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38 lignes
1.1 KiB
38 lignes
1.1 KiB
var baseToNumber = require('./_baseToNumber'),
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baseToString = require('./_baseToString');
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/**
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* Creates a function that performs a mathematical operation on two values.
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*
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* @private
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* @param {Function} operator The function to perform the operation.
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* @param {number} [defaultValue] The value used for `undefined` arguments.
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* @returns {Function} Returns the new mathematical operation function.
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*/
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function createMathOperation(operator, defaultValue) {
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return function(value, other) {
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var result;
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if (value === undefined && other === undefined) {
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return defaultValue;
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}
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if (value !== undefined) {
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result = value;
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}
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if (other !== undefined) {
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if (result === undefined) {
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return other;
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}
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if (typeof value == 'string' || typeof other == 'string') {
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value = baseToString(value);
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other = baseToString(other);
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} else {
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value = baseToNumber(value);
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other = baseToNumber(other);
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}
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result = operator(value, other);
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}
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return result;
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};
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}
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module.exports = createMathOperation;
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