Groovy: List: indexOf: Return the index of an element in the list

Groovy provides ‘indexof’ method, it returns the index of an element in the list. If no element found, then indexOf method return -1.

HelloWorld.groovy

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

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

println "Index of 'i' is $index1"
println "Index of 'z' is $index2"

Output

Index of 'i' is 2

Index of 'z' is -1

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