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(Quick Reference)



Uses the Groovy JDK grep method to iterate over each element of the specified object that match the specified "filter" attribute. The filter can be different instances such as classes, regex patterns etc.


Stephen King's non-fiction Books:
<g:grep in="${books}" filter="NonFictionBooks.class">
     <p>Title: ${it.title}</p>

<g:grep in="${books.title}" filter="~/.*Groovy.*/">
     <p>Title: ${it}</p>



  • in - The object to iterative over

  • filter - The filter instance such as a class, regular expression or anything that implements isCase