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  4. Groovy Goodness: Swapping Elements in a Collection

Groovy Goodness: Swapping Elements in a Collection

Hubert Klein Ikkink user avatar by
Hubert Klein Ikkink
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Apr. 18, 15 · Interview
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Groovy already has so many extra methods for working with collections. If we have to need to swap two elements in a collection we can use the swap method. We provide the two index values of the elements we want to swap and Groovy swaps the elements.

In the following sample we have a simple list and swap all elements by invoking the swap method two times:

def saying = ['Groovy', 'is', 'great']

def yodaSays = saying.swap(2, 1).swap(0, 1)

assert yodaSays.join(' ') == 'great Groovy is'

Written with Groovy 2.4.1.

Element Groovy (programming language)

Published at DZone with permission of Hubert Klein Ikkink, DZone MVB. See the original article here.

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