简洁性:Bash 提供了简单直观的字符串比较语法。 集成性:作为 shell 脚本语言,Bash 的字符串比较可以直接嵌入到命令行操作中,便于快速编写脚本。 兼容性:Bash 是广泛使用的 shell,其字符串比较功能在各种 Unix-like 系统中都得到支持。 类型 Bash 中的字符串比较运算符主要分为两类: 相等性比较:=或==和!=。 顺...
In this quick tutorial, I’ll show you how to compare strings in Bash shell scripts. Bash string comparison syntax Here is how you compare strings in Bash. if [ "$string1" == "$string2" ] You can also use a string directly instead of using a variable. ...
In this article, we will explain string comparison in Bash using if statement. The shell program that runs in Linux and provides a command line interface for users to execute different commands is called Bash shell. It is also used as the default shell in many Linux distributions and is call...
if [ $string1 ] # 这次$string1 变成"裸体"的了,相当于[ -n $string1 ] 27 then 28 echo "String \"string1\" is not null." 29 else 30 echo "String \"string1\" is null." 31 fi 32 33 string1=initialized 34 if [ $string1 ] # 再来 35 then 36 echo "String \"string1\" is...
@ 12431234123412341234123` {echo invalid && false; ``比`(echo invalid && false)`更有效,因为它避免支付不必要的子shell. (4认同) @gniourf_gniourf,没问题,请使用`["$ X"=="有效"] || (echo invalid && false)&& echo"valid"`. (3认同) Gur*_*uru 71 a="abc" b="def" # Equality...
shell bash中的字符串比较不起作用注意空格和单个=。[实际上是一个程序，其余的都是参数！
shell bash中的字符串比较不起作用注意空格和单个=。[实际上是一个程序，其余的都是参数！
public static boolean equals(String str1, String str2) Compares two Strings, returning true if they are equal. nulls are handled without exceptions. Two null references are considered to be equal. The comparison is case sensitive. StringUtils.equals(null, null) = true ...
string.sh #! /bin/bash word=a if [[ $word == "b" ]] then echo "condition b is true" elif [[ $word == "a" ]] then echo "condition a is true" else echo "condition is false" fi bash Shell Useful tools for Programmers ...
Bash (Bourne Again SHell) is a command-line interpreter, or shell, for the Linux operating system. A bash script is a file containing a series of commands that the bash shell can execute. These scripts can automate tasks, perform file manipulations, and much more. ...