/bin/bash # 假设文件名为 input.txt file="input.txt" array=($(cat "$file")) # 输出数组内容 for item in "${array[@]}"; do echo "$item" done 基础概念 IFS (Internal Field Separator): 是 Bash 中的一个内部变量,用于指定字段分隔符。默认情况下,IFS 包含空格、制表符和换行符。
array=("apple" "banana" "orange") for fruit in "${array[@]}" do echo "水果:$fruit" done 复制代码 遍历文件列表: for file in /path/to/directory/* do echo "文件名:$file" done 复制代码 遍历命令输出: for item in $(ls) do echo "项目:$item" done 复制代码 使用C风格的循环: ...
for 循环一般格式为: for var in item1 item2 ... itemN do command1 command2 ... commandN done while 语句 while 循环用于不断执行一系列命令,也用于从输入文件中读取数据;命令通常为测试条件。其格式为: while condition do command done 无限循环 无限循环语法格式: while : do command done 或者 whil...
function containsElement() { local value=$1shiftforitemin"${@:1}";do[["$item"=="$value"]] &&return0donereturn5} A=("one""two""three four")ifcontainsElement"three four""${A[@]}"; then echoinfi
for var in item1 item2 ... itemN; do command1; command2… done; C风格的形式: for (( EXP1; EXP2; EXP3 )) do command1 command2 command3 done 4.2、while循环 格式: while condition do command done 特殊用法:遍历文件的每一行
each element in the array. The"${array[@]}"syntax is used to access all elements in the array. For each iteration, the current element’s value is stored in theivariable, which we then print out using theechocommand. This results in each item in the array being printed on a new ...
Standard Bash For Loop Here is an example of how the Bash For Loop takes the form: for item in [LIST] do [COMMANDS] done In the above expression, the list can be a series of things that are parted by anything from a range of numbers to an array. Over Strings Now let's look at...
The Bash array variables come in two flavors, the one-dimensional indexed arrays, and the associative arrays. The indexed arrays are sometimes called lists and the associative arrays are sometimes called dictionaries or hash tables. The support for Bash Arrays simplifies heavily how you can write ...
for...of & for...in两者都可以用于遍历,不过for in遍历的是数组的索引(index),而for of遍历的是数组元素值(value),对此做了几组实验关于数组测试数据:const menu = ['tomato', 'egg', 'rice']直接遍历数组:for...in获取的是数组的索引值,for...of获取的是数组的属性值for(const item in m ...
for item in "${my_array[@]}"; do stuff with "$item" doneWhy would string interpolation syntax ever be used to iterate over items in an array? I have some theories, but they are only that. I could tell you, but it wouldn't make this syntax any less awful. If you're not too ...