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From "Winnebeck, Jason" <>
Subject RE: Looping through a hashmap & removing elements
Date Thu, 02 Jun 2016 18:27:43 GMT
If you want to actually edit the original map:

def uidMap = [
  a: 123,
  b: 456,
  c: 789

uidMap.entrySet().removeAll { it.key.startsWith('a') }

If you want a new map, emmanuel’s solution using findAll is best.


From: Guy Matz []
Sent: Thursday, June 02, 2016 2:18 PM
Subject: Looping through a hashmap & removing elements

Hi!  I want to loop through a hashmap and delete some elements based on some criteria . .
.  I thought there would be some slick groovy method - in the spirit of findAll, etc. - to
do this, but couldn't find it . . .  my java developer workmate suggested:

iter = uidMap.entrySet().iterator()
while (iter.hasNext()) {
    entry =
    key = entry.key
    value = entry.value

    if (bla, blah, blah) {



Is there a groovier way?



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