Alternatively, use arrays if your string contains whitespace. In addition to allowing the bash loop to read space-separated items, they are easier to iterate and expand. Here’s the syntax: array=("First item" "
“STRING” 将会阻止(解释)STRING 中大部分特殊的字符。后面的实验会详细说明。 单引号(’) ‘STRING’ 将会阻止 STRING 中所有特殊字符的解释,这是一种比使用"更强烈的形式。后面的实验会详细说明。 反引号(`) 命令替换 反引号中的命令会优先执行,如: cp `mkdir back` test.sh back ls 先创建了 back 目录...
每个分支内部的构建函数必须遵循构建函数的规则,并创建一个或多个组件。...break; } default: { console.log('非法输入'); break; } }循环迭代当一个对象实现了...Symbol.iterator属性时,我们认为它是可迭代的。...一些内置的类型如Array,Map,Set,String,Int32Array,Uint32Array等都具有可迭代性。 6100 您...
在上述示例中,通过my_array+=($i)将变量$i添加到数组my_array中。 使用字符串拼接:可以定义一个空字符串,然后在循环中通过字符串拼接的方式添加元素。示例代码如下: 代码语言:txt 复制 #!/bin/bash # 定义一个空字符串 my_string="" # 循环添加元素到字符串中 for ((i=1; i<=5; i++)) do my_s...
8.1. Declare simple bash array #!/bin/bash #Declare array with 4 elements ARRAY=( 'Debian Linux' 'Redhat Linux' Ubuntu Linux ) # get number of elements in the array ELEMENTS=${#ARRAY[@]} # echo each element in array # for loop ...
In this example, we first added “Australia” to ourcountriesarray using+=. We then removed the second element (“UK”) usingunset. The updated array is then printed out, showing the changes. Looping Through Arrays You can iterate through the elements of a Bash array using aforloop. Here...
It uses a for loop to iterate over each element (name) in the array. Inside the loop, it prints a greeting message for each name using "echo". The '$name' variable holds the value of each name in each iteration of the loop.Bash...
for loopin 1 2 3 4 5 do echo "The value is: $loop" done 输出结果: The value is: 1 The value is: 2 The value is: 3 The value is: 4 The value is: 5 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: ...
Bash while Loop Iterate through an Array An array stores multiple elements of the same data type. Loop structures serve as a fundamental tool for iterating through arrays and performing operations on each of their elements. For example, let’s create a Bash script that has an array of 5 ele...
for n in a b c d e do while true do if [ $RANDOM -gt 20000 ] then printf . break 2 ## break out of both while and for loops elif [ $RANDOM -lt 10000 ] then printf '"' break ## break out of the while loop fi done done echo 继续 在循环内部, continue命令通过传递任何剩余...