/ Published in: Groovy
Example of working with regexp sub-matches via Groovy way
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str = "<img width=20 height=20 src='./img/but-small.jpg'/>" str2 = str.replaceAll(/width=(\d+) height=(\d+) src='(.+)-small\.jpg'/) {ma, wi, he, nm -> "width=${new Integer(wi) * 2} height=${he.toInteger() * 2} src='$nm-large.jpg'" }