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565 rader
14 KiB
565 rader
14 KiB
/**
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* lodash (Custom Build) <https://lodash.com/>
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* Build: `lodash modularize exports="npm" -o ./`
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* Copyright jQuery Foundation and other contributors <https://jquery.org/>
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* Released under MIT license <https://lodash.com/license>
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* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
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* Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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*/
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/** Used as references for various `Number` constants. */
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var MAX_SAFE_INTEGER = 9007199254740991;
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/** `Object#toString` result references. */
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var argsTag = '[object Arguments]',
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funcTag = '[object Function]',
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genTag = '[object GeneratorFunction]';
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/** Used to detect unsigned integer values. */
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var reIsUint = /^(?:0|[1-9]\d*)$/;
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/**
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* A specialized version of `_.forEach` for arrays without support for
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* iteratee shorthands.
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*
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* @private
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* @param {Array} [array] The array to iterate over.
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* @param {Function} iteratee The function invoked per iteration.
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* @returns {Array} Returns `array`.
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*/
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function arrayEach(array, iteratee) {
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var index = -1,
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length = array ? array.length : 0;
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while (++index < length) {
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if (iteratee(array[index], index, array) === false) {
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break;
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}
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}
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return array;
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}
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/**
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* The base implementation of `_.times` without support for iteratee shorthands
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* or max array length checks.
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*
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* @private
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* @param {number} n The number of times to invoke `iteratee`.
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* @param {Function} iteratee The function invoked per iteration.
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* @returns {Array} Returns the array of results.
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*/
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function baseTimes(n, iteratee) {
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var index = -1,
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result = Array(n);
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while (++index < n) {
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result[index] = iteratee(index);
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}
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return result;
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}
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/**
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* Creates a unary function that invokes `func` with its argument transformed.
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*
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* @private
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* @param {Function} func The function to wrap.
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* @param {Function} transform The argument transform.
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* @returns {Function} Returns the new function.
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*/
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function overArg(func, transform) {
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return function(arg) {
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return func(transform(arg));
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};
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}
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/** Used for built-in method references. */
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var objectProto = Object.prototype;
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/** Used to check objects for own properties. */
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var hasOwnProperty = objectProto.hasOwnProperty;
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/**
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* Used to resolve the
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* [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
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* of values.
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*/
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var objectToString = objectProto.toString;
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/** Built-in value references. */
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var propertyIsEnumerable = objectProto.propertyIsEnumerable;
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/* Built-in method references for those with the same name as other `lodash` methods. */
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var nativeKeys = overArg(Object.keys, Object);
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/**
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* Creates an array of the enumerable property names of the array-like `value`.
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*
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* @private
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* @param {*} value The value to query.
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* @param {boolean} inherited Specify returning inherited property names.
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* @returns {Array} Returns the array of property names.
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*/
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function arrayLikeKeys(value, inherited) {
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// Safari 8.1 makes `arguments.callee` enumerable in strict mode.
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// Safari 9 makes `arguments.length` enumerable in strict mode.
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var result = (isArray(value) || isArguments(value))
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? baseTimes(value.length, String)
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: [];
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var length = result.length,
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skipIndexes = !!length;
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for (var key in value) {
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if ((inherited || hasOwnProperty.call(value, key)) &&
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!(skipIndexes && (key == 'length' || isIndex(key, length)))) {
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result.push(key);
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}
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}
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return result;
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}
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/**
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* The base implementation of `_.forEach` without support for iteratee shorthands.
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*
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* @private
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* @param {Array|Object} collection The collection to iterate over.
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* @param {Function} iteratee The function invoked per iteration.
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* @returns {Array|Object} Returns `collection`.
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*/
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var baseEach = createBaseEach(baseForOwn);
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/**
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* The base implementation of `baseForOwn` which iterates over `object`
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* properties returned by `keysFunc` and invokes `iteratee` for each property.
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* Iteratee functions may exit iteration early by explicitly returning `false`.
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*
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* @private
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* @param {Object} object The object to iterate over.
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* @param {Function} iteratee The function invoked per iteration.
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* @param {Function} keysFunc The function to get the keys of `object`.
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* @returns {Object} Returns `object`.
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*/
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var baseFor = createBaseFor();
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/**
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* The base implementation of `_.forOwn` without support for iteratee shorthands.
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*
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* @private
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* @param {Object} object The object to iterate over.
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* @param {Function} iteratee The function invoked per iteration.
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* @returns {Object} Returns `object`.
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*/
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function baseForOwn(object, iteratee) {
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return object && baseFor(object, iteratee, keys);
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}
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/**
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* The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
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*
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* @private
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* @param {Object} object The object to query.
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* @returns {Array} Returns the array of property names.
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*/
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function baseKeys(object) {
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if (!isPrototype(object)) {
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return nativeKeys(object);
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}
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var result = [];
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for (var key in Object(object)) {
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if (hasOwnProperty.call(object, key) && key != 'constructor') {
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result.push(key);
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}
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}
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return result;
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}
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/**
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* Creates a `baseEach` or `baseEachRight` function.
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*
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* @private
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* @param {Function} eachFunc The function to iterate over a collection.
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* @param {boolean} [fromRight] Specify iterating from right to left.
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* @returns {Function} Returns the new base function.
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*/
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function createBaseEach(eachFunc, fromRight) {
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return function(collection, iteratee) {
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if (collection == null) {
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return collection;
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}
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if (!isArrayLike(collection)) {
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return eachFunc(collection, iteratee);
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}
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var length = collection.length,
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index = fromRight ? length : -1,
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iterable = Object(collection);
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while ((fromRight ? index-- : ++index < length)) {
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if (iteratee(iterable[index], index, iterable) === false) {
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break;
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}
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}
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return collection;
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};
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}
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/**
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* Creates a base function for methods like `_.forIn` and `_.forOwn`.
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*
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* @private
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* @param {boolean} [fromRight] Specify iterating from right to left.
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* @returns {Function} Returns the new base function.
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*/
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function createBaseFor(fromRight) {
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return function(object, iteratee, keysFunc) {
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var index = -1,
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iterable = Object(object),
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props = keysFunc(object),
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length = props.length;
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while (length--) {
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var key = props[fromRight ? length : ++index];
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if (iteratee(iterable[key], key, iterable) === false) {
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break;
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}
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}
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return object;
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};
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}
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/**
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* Checks if `value` is a valid array-like index.
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*
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* @private
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* @param {*} value The value to check.
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* @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
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* @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
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*/
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function isIndex(value, length) {
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length = length == null ? MAX_SAFE_INTEGER : length;
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return !!length &&
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(typeof value == 'number' || reIsUint.test(value)) &&
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(value > -1 && value % 1 == 0 && value < length);
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}
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/**
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* Checks if `value` is likely a prototype object.
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*
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* @private
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
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*/
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function isPrototype(value) {
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var Ctor = value && value.constructor,
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proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
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return value === proto;
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}
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/**
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* Iterates over elements of `collection` and invokes `iteratee` for each element.
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* The iteratee is invoked with three arguments: (value, index|key, collection).
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* Iteratee functions may exit iteration early by explicitly returning `false`.
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*
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* **Note:** As with other "Collections" methods, objects with a "length"
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* property are iterated like arrays. To avoid this behavior use `_.forIn`
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* or `_.forOwn` for object iteration.
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*
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* @static
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* @memberOf _
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* @since 0.1.0
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* @alias each
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* @category Collection
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* @param {Array|Object} collection The collection to iterate over.
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* @param {Function} [iteratee=_.identity] The function invoked per iteration.
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* @returns {Array|Object} Returns `collection`.
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* @see _.forEachRight
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* @example
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*
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* _([1, 2]).forEach(function(value) {
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* console.log(value);
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* });
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* // => Logs `1` then `2`.
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*
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* _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
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* console.log(key);
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* });
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* // => Logs 'a' then 'b' (iteration order is not guaranteed).
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*/
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function forEach(collection, iteratee) {
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var func = isArray(collection) ? arrayEach : baseEach;
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return func(collection, typeof iteratee == 'function' ? iteratee : identity);
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}
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/**
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* Checks if `value` is likely an `arguments` object.
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*
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* @static
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* @memberOf _
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* @since 0.1.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is an `arguments` object,
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* else `false`.
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* @example
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*
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* _.isArguments(function() { return arguments; }());
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* // => true
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*
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* _.isArguments([1, 2, 3]);
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* // => false
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*/
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function isArguments(value) {
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// Safari 8.1 makes `arguments.callee` enumerable in strict mode.
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return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
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(!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
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}
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/**
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* Checks if `value` is classified as an `Array` object.
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*
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* @static
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* @memberOf _
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* @since 0.1.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is an array, else `false`.
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* @example
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*
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* _.isArray([1, 2, 3]);
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* // => true
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*
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* _.isArray(document.body.children);
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* // => false
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*
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* _.isArray('abc');
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* // => false
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*
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* _.isArray(_.noop);
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* // => false
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*/
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var isArray = Array.isArray;
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/**
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* Checks if `value` is array-like. A value is considered array-like if it's
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* not a function and has a `value.length` that's an integer greater than or
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* equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
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*
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* @static
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* @memberOf _
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* @since 4.0.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is array-like, else `false`.
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* @example
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*
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* _.isArrayLike([1, 2, 3]);
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* // => true
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*
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* _.isArrayLike(document.body.children);
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* // => true
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*
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* _.isArrayLike('abc');
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* // => true
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*
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* _.isArrayLike(_.noop);
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* // => false
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*/
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function isArrayLike(value) {
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return value != null && isLength(value.length) && !isFunction(value);
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}
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/**
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* This method is like `_.isArrayLike` except that it also checks if `value`
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* is an object.
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*
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* @static
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* @memberOf _
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* @since 4.0.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is an array-like object,
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* else `false`.
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* @example
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*
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* _.isArrayLikeObject([1, 2, 3]);
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* // => true
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*
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* _.isArrayLikeObject(document.body.children);
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* // => true
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*
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* _.isArrayLikeObject('abc');
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* // => false
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*
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* _.isArrayLikeObject(_.noop);
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* // => false
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*/
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function isArrayLikeObject(value) {
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return isObjectLike(value) && isArrayLike(value);
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}
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/**
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* Checks if `value` is classified as a `Function` object.
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*
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* @static
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* @memberOf _
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* @since 0.1.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is a function, else `false`.
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* @example
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*
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* _.isFunction(_);
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* // => true
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*
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* _.isFunction(/abc/);
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* // => false
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*/
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function isFunction(value) {
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// The use of `Object#toString` avoids issues with the `typeof` operator
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// in Safari 8-9 which returns 'object' for typed array and other constructors.
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var tag = isObject(value) ? objectToString.call(value) : '';
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return tag == funcTag || tag == genTag;
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}
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/**
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* Checks if `value` is a valid array-like length.
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*
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* **Note:** This method is loosely based on
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* [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
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*
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* @static
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* @memberOf _
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* @since 4.0.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
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* @example
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*
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* _.isLength(3);
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* // => true
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*
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* _.isLength(Number.MIN_VALUE);
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* // => false
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*
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* _.isLength(Infinity);
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* // => false
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*
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* _.isLength('3');
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* // => false
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*/
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function isLength(value) {
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return typeof value == 'number' &&
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value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
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}
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/**
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* Checks if `value` is the
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* [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
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* of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
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*
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* @static
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* @memberOf _
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* @since 0.1.0
|
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is an object, else `false`.
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* @example
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*
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* _.isObject({});
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* // => true
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*
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* _.isObject([1, 2, 3]);
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* // => true
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*
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* _.isObject(_.noop);
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* // => true
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*
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* _.isObject(null);
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* // => false
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*/
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function isObject(value) {
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var type = typeof value;
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return !!value && (type == 'object' || type == 'function');
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}
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|
|
/**
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* Checks if `value` is object-like. A value is object-like if it's not `null`
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* and has a `typeof` result of "object".
|
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*
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* @static
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* @memberOf _
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* @since 4.0.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is object-like, else `false`.
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* @example
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*
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* _.isObjectLike({});
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* // => true
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*
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* _.isObjectLike([1, 2, 3]);
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* // => true
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*
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* _.isObjectLike(_.noop);
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* // => false
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*
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* _.isObjectLike(null);
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* // => false
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*/
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function isObjectLike(value) {
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return !!value && typeof value == 'object';
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}
|
|
|
|
/**
|
|
* Creates an array of the own enumerable property names of `object`.
|
|
*
|
|
* **Note:** Non-object values are coerced to objects. See the
|
|
* [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
|
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* for more details.
|
|
*
|
|
* @static
|
|
* @since 0.1.0
|
|
* @memberOf _
|
|
* @category Object
|
|
* @param {Object} object The object to query.
|
|
* @returns {Array} Returns the array of property names.
|
|
* @example
|
|
*
|
|
* function Foo() {
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* this.a = 1;
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* this.b = 2;
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* }
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|
*
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* Foo.prototype.c = 3;
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*
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* _.keys(new Foo);
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* // => ['a', 'b'] (iteration order is not guaranteed)
|
|
*
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|
* _.keys('hi');
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* // => ['0', '1']
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*/
|
|
function keys(object) {
|
|
return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
|
|
}
|
|
|
|
/**
|
|
* This method returns the first argument it receives.
|
|
*
|
|
* @static
|
|
* @since 0.1.0
|
|
* @memberOf _
|
|
* @category Util
|
|
* @param {*} value Any value.
|
|
* @returns {*} Returns `value`.
|
|
* @example
|
|
*
|
|
* var object = { 'a': 1 };
|
|
*
|
|
* console.log(_.identity(object) === object);
|
|
* // => true
|
|
*/
|
|
function identity(value) {
|
|
return value;
|
|
}
|
|
|
|
module.exports = forEach;
|