From 2055189b70e8b72500d43c0f0232b4d41a1b0a7e Mon Sep 17 00:00:00 2001
From: Wu Mianzhi <10215501411@stu.ecnu.edu.cn>
Date: Mon, 12 Sep 2022 11:06:24 +0800
Subject: [PATCH] Add Homework Lab1

---
 lab1/10215501411.sh | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 lab1/10215501411.sh

diff --git a/lab1/10215501411.sh b/lab1/10215501411.sh
new file mode 100644
index 0000000..c78f8f0
--- /dev/null
+++ b/lab1/10215501411.sh
@@ -0,0 +1,57 @@
+SAMESTR="ThisIsTheSameString" #Same String for uniq 
+readonly SAMESTR
+
+##
+# Get random integar between 1 and 100
+##
+function getRandomName(){
+    rnd=`expr $RANDOM % 64 + 1`
+    return $rnd
+}
+
+##
+# Get random string, first parametar is length
+##
+function getRandomString(){
+    openssl rand -base64 $1
+}
+
+function generate(){
+    size=500
+    i=0
+    while(( $i < $size ))
+    do
+        getRandomName
+        length=$?
+        #echo "START"
+        if [[ $length -ge 1  && $length -le 25 ]] 
+        then
+            echo $SAMESTR
+        else
+            echo `getRandomString $length`
+        fi
+        let "i++"
+    done
+}
+
+function sortByASCII(){
+    generate | sort | uniq -u
+}
+
+function sortByNumeric(){
+    generate | sort --numeric-sort | uniq -u
+}
+
+echo "Overwrite lines:" > resultASCII #this line should not appear in output file
+sortByASCII > resultASCII
+echo "Append lines:" >> resultASCII #this line should appear in output file
+sortByASCII >> resultASCII
+
+echo "Overwrite lines:" > resultNumeric #this line should not appear in output file
+sortByNumeric > resultNumeric
+echo "Append lines:" >> resultNumeric #this line should appear in output file
+sortByNumeric >> resultNumeric
+
+echo "Number of same string in file:"
+generate > randomLines
+grep --only-matching $SAMESTR < randomLines | wc --lines
\ No newline at end of file