本文介绍了从字符串中提取模式的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
在bash脚本中,从字符串中提取文本模式的简单方法是什么?
In bash script, what is the easy way to extract a text pattern from a string?
例如,我要提取X
,然后在字符串末尾提取2位数字吗?
For example, I want to extract X
followed by 2 digits in the end of the string?
推荐答案
使用双方括号.捕获的组在$BASH_REMATCH
数组中可用.
There's a nifty =~
regex operator when you use double square brackets. Captured groups are made available in the $BASH_REMATCH
array.
if [[ $STRING =~ (X[0-9]{2})$ ]]; then
echo "matched part is ${BASH_REMATCH[1]}"
fi
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