正则表达式完全匹配 [英] Regexp exact word match
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问题描述
我需要匹配行中的单词.例如:
I need to match words from lines. For example:
The blue bird is dancing.
Yellow card is drawn
The day is perfect rainy
blue bird is eating
这四行在文本文件 l2 中.
我想匹配蓝鸟，黄牌，日期，并且每次打印一行时，都在该行之前打印匹配的单词.
I want to match the blue bird, yellow card, day and every time a line is printed that matched word is printed before the line.
y=regexp(l2,('^(?=.*blue bird)|(?=.*day)|(?=.*Yellow card)$'));
这是如何工作的?我无法得到结果.
Is this how it works? I can't get the result.
sprintf('[%s]',y,l2);
推荐答案
MATLAB's regex engine doesn't use \b as word boundary anchors but \< and \>.
所以你的正则表达式会变成
So your regex would become
y = regexp(l2, '^(?=.*\<(?:blue bird|day|Yellow card)\>).*', 'lineanchors');
假设 l2 是多行字符串.
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