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dmahapatro/DeepMergeMap.groovy

Last active January 7, 2016 13:37
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Deep Merge Groovy Map
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DeepMergeMap.groovy
Map.metaClass.merge = { Map rhs ->
def lhs = delegate // or delegate.clone() to make delegate immutable
rhs.each { k, v -> lhs[k] = lhs[k] in Map ? lhs[k].merge(v) : (lhs[k] != null ? lhs[k] && v : v) }
lhs
}
def a = [ foo: [ foo: true, bar: true ] ]
def b = [ foo: [ bar: false, baz: true ] ]
assert a.merge(b) == [ foo: [ foo: true, bar: false, baz: true ] ]
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