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Is there any method to getting out of the forEach() like any break loop method?
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Nope. You can add an if condition in the a!forEach() and where you want to add a break, you can start putting null instead. And in the end, you can reject all the null values. -UPDATE-Adding the code block below.
reject( a!isNullOrEmpty(_), a!forEach( items: enumerate(10), expression: if(fv!item < 5, fv!item, null) ) )
instead of null, have it output empty set ({}). These will disappear from the output array (unless all results are an empty set - if this corner case is possible just wrap the a!forEach() in a!flatten() and the list of empty sets will be collapsed to an empty set).
Wow. Didn't know that. Thanks, Mike!