return $result }push_func( ) { dirname=$1 #如果dirname为null,退出funcuntion,如cd dirname成功,push the directory ,否则显示still in $PWD,cd使用function的cd函数,其优先级别高于已在内核编译了的cd if cd ${dirname:?"missing directory name."} then ...
如何没有最后的reture,例如后面的push_func,exit status就是最后执行的command的exit status return $result } push_func( ) { dirname=$1 #如果dirname为null,退出funcuntion,如cd dirname成功,push the directory ,否则显示still in $PWD,cd使用function的cd函数,其优先级别高于已在内核编译了的cd if cd ${d...
取决于函数中执行的最后一条语句 自定义:return N 函数可以接受参数: 在函数体可以使用类似脚本调用位置参数一样的参数 $1, $2, ... $# $*, $@ #!/bin/bash # function ShowUserInfo { [ $# -lt 1 ] && return 6 grep "^$1\>" /etc/passwd | cut -d: -f3,7 } function main { while t...
# Function to test if a variable is set to"true" _if () { ["${1}" =="true" ] && return 0 ["${1}" =="True" ] && return 0 ["${1}" =="Yes" ] && return 0 return 1 } 例1 1234567 my_boolean=true _if ${my_boolean} && { echo"True Is True" } || { echo"False...
function istxt($txt) { $content = @file_get_contents($txt); if ($conten... 5.3K30 PHP 检测变量是否为空 PHP 中以下值得计算结果为 false: 关键字 boolean false 整型 integer 0 浮点型 double 0.0 字符串 string "" 字符串 string "0" 数组 array...array() 对象 object 空对象 php<5 null...
/** *判断是否为空文件夹* chen * @param unknown $dir * @return boolean */function dir_is_empty($dir){ if($handle = opendir($dir)) { while($item = readdir($handle)){ if ($item != "." php 原创 chen2009277025 2014-12-02 17:41:01 ...
/bin/sh # http://code.google.com/p/mooon # 通用的停止指定名的进程 # 特色: # 1. 只会停止当前用户名下的进程 # 2...可以指定命令行参数,可执行精准停止 # 检查参数 # 参数1:需要停止的进程名或它的完整命令行或部分命令行 if test $# -ne 1; t...
$RANDOM is a bash function (not a constant) that returns a random signed 16-bit integer (from 0 through 32767). The let command is a built-in Bash command to evaluate arithmetic expressions. Using the following command creates a sufficiently unique value for most purposes. Azure CLI Copy Cl...
An if statement always tests for a boolean condition to evaluate to true or false. The then, else if (elif), and else are clauses to the if statement. What is the syntax of a Bash If Statement? In Bash, the if statement is part of the conditional constructs of the programming ...
节点generateData.js〉db.json在Visual Studio代码的终端上运行：猛击如果您在Windows中使用GitBash在./...