Groovy: List: lastIndexOf: Return the index of an element from the end of list

Groovy provides ‘lastIndexof’ method, it returns the index of an element in the list from the end. If no element found, then lastIndexOf method return -1.

HelloWorld.groovy

chars = ['a', 'e', 'i', 'o', 'u', 'u', 'o', 'i', 'e', 'a']

int index1 = chars.indexOf('i')
int index2 = chars.lastIndexOf('i')

println "Index of 'i' is $index1"
println "Index of 'i' from the end of list is $index2"

Output

Index of 'i' is 2

Index of 'i' from the end of list is 7

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