Since Groovy 2.4 we can use the indices property on a Collection to get the indices of the elements in the collection. We get an IntRange object as a result.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | def list = [3, 20, 10, 2, 1]assert list.indices == 0..4// Combine letters in alphabet// with position (zero-based).def alphabet = 'a'..'z'def alphabetIndices = [alphabet, alphabet.indices].transpose()// alphabetIndices = [['a', 0], ['b', 1], ...]// Find position of each letter// from 'groovy' in alphabet.def positionInAlphabet = 'groovy'.inject([]) { result, value -> result << alphabetIndices.find { it[0] == value }[1] + 1 result}assert positionInAlphabet == [7, 18, 15, 15, 22, 25] |
Code written with Groovy 2.4.
