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Simple question that I haven't been able to find a simple answer for on the googles: what is the difference between Groovy's each and forEach loops?
I made a simple example and the syntax and behavior seem identical:
[1, 2].each { println it } [1, 2].forEach { println it } Both print:
1 2 The only example I see of both in the Groovy Language Documentation seems to touch on the difference between lambdas and closures, but I can't relate that to the examples I've tried.
Thank you
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each differs for the arguments passed to the callback. If you use _. forEach , the first argument passed to the callback is the value, not the key. So if you don't bother at all about the key you should use _.
groovy Ways of Iteration in Groovy Each and EachWithIndex each and eachWithIndex are methods to iterate over collections. each have it (default iterator) and eachWithIndex have it , index (default iterator, default index). We can also change the default iterator/index.
The first distinction between each() and forEach() is that each() is provided by Groovy's GDK, while forEach() is provided by Java 8 (so it is not available in prior versions of Java.
Another difference is that each() accepts a Groovy closure while forEach() accepts a Consumer. From Groovy, this difference is not noticeable because Groovy transparently coerces the closure to a Consumer.
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