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

    <g:grep in="${books.title}" filter="~/.*Groovy.*/">
         <p>Title: ${it}</p>
    </g:grep>
### Description Attributes `in` - The object to iterative over `filter` - The filter instance such as a class, regular expression or anything that implements `isCase` | Quick Reference (hide)