概念:bash提供了多个字符串替换函数,如replace()、substr()等,可以根据不同的需求选择合适的函数来替换字符串内容。 优势:提供了更多灵活的字符串替换方式。 应用场景:根据具体需求选择合适的字符串替换函数。 示例代码: 示例代码: 以上是在bash中用自己的内容替换字符串的几种方法。根据具体的需求
# echo `expr "$stringZ" : '\(...\)'` # abcABC1 # echo `expr match "$stringZ" '.*\([A-C][A-C][A-C][a-c]*\)'` # ABCabc # echo `expr "$stringZ" : '.*\(...\)'` # ABCabc expr的match和":"操作是等同的。 五、子串删除 删除子串分为最短删除和最长删除两种。删除...
5. Find and Replace String Values inside Bash Shell Script Replace only first match ${string/pattern/replacement} It matches the pattern in the variable $string, and replace only the first match of the pattern with the replacement. $catfirstmatch.sh#! /bin/bash filename="bash.string.txt"ech...
echo${string/r/_} OUTPUT 1 2 3 Wo_dsWorld This replaces first occurrence ofrwith_. ${string/r/_}: The syntax follows this pattern:{variable//pattern/replacement}. In this specific case: //r/_tells Bash to replace first occurrence ofrwith_in the value of string. ...
str1 下标从 0 开始 string="test test hello world" echo "${string/test/replace}" # output: replace test hello world string="text testhello world" echo "${string/test/replace}" # output: text replacehello world string="test test hello world" echo "${string/test}" # output: test hell...
Bash has some built-in methods for string manipulation. If you want to replace part of a string with another, this is how you do it: ${main_string/search_term/replace_term} Create a string variable consisting of the line: “I am writing a line today” without the quotes and then repl...
Vue-cli中的跳转一.页面中跳转指定网页写法一: 这里的name是在VUE路由里面的写法二: 注意:router-link中链接如果是'/'开始就是从根路由开始,如果开始不带'/',则从当前路由开始。...二.js中跳转 push与replace用法一样,都是跳转到指定网页区别: push会history栈中添加一个记录,点击后退会返回到上一个页面 rep...
${string:$pos:$len} 💡 Like arrays, positioning in strings also start at 0. Here's an example: Even if you specify the substring length greater than the string length, it will only go till the end of the string. Replace substring in bash ...
In this example we declare simple bash variable and print it on the screen ( stdout ) with echo command. #!/bin/bash STRING="HELLO WORLD!!!" echo $STRING 1. 2. 3. Your backup script and variables: #!/bin/bash OF=myhome_directory_$(date +%Y%m%d).tar.gz ...
substring=${string_variable_name:starting_position:length}。 10. 字符串替换 alpha="This is a test string in which the word \"test\" is replaced." beta="${alpha/test/replace}" beta="${alpha//test/replace}" 1. 2. 3. 解释:用"replace"替换”test“。如果想替换字符串里所有的”test“,...