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  1. def x = [ [a:1, b:2], [a:1, b:3], [a:2, b:4] ] 
  2. def result = x.collect{it.a}
  3. println result
Success #stdin #stdout 2.39s 138288KB
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[1, 1, 2]
https://ideone.com/jYdxwI
language:
Groovy (groovy 2.5.6)
created:
17 hours ago
visibility:
public

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