mirror of
https://github.com/dunwu/linux-tutorial.git
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56 lines
1.4 KiB
Bash
56 lines
1.4 KiB
Bash
#!/usr/bin/env bash
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################### 单引号和双引号 ###################
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################### 拼接字符串 ###################
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# 使用单引号拼接
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name1='white'
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str1='hello, '${name1}''
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str2='hello, ${name1}'
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echo ${str1}_${str2}
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# Output:
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# hello, white_hello, ${name1}
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# 使用双引号拼接
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name2="black"
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str3="hello, "${name2}""
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str4="hello, ${name2}"
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echo ${str3}_${str4}
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# Output:
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# hello, black_hello, black
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################### 获取字符串长度 ###################
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text="12345"
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echo "${text} length is: ${#text}"
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# Output:
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# 12345 length is: 5
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################### 获取字符串长度 ###################
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text="12345"
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echo ${text:2:2}
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# Output:
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# 34
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################### 查找子字符串 ###################
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text="hello"
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echo `expr index "${text}" ll`
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# Output:
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# 3
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################### 截取关键字左边内容 ###################
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full_branch="feature/1.0.0"
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branch=`echo ${full_branch#feature/}`
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echo "branch is ${branch}"
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################### 截取关键字右边内容 ###################
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full_version="0.0.1-SNAPSHOT"
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version=`echo ${full_version%-SNAPSHOT}`
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echo "version is ${version}"
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################### 判断字符串中是否包含子字符串 ###################
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result=$(echo "${str}" | grep "feature/")
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if [[ "$result" != "" ]] ; then
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echo "feature/ 是 ${str} 的子字符串"
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else
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echo "feature/ 不是 ${str} 的子字符串"
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fi
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