Introduction :
Kotlin String class provides one method called slice to get one sub-string containing the characters defined by the method argument. It has two variants. In this post, I will show you how to use this method with examples :
public fun String.slice(indices: IntRange): String :
It takes one IntRange argument and returns one string containing the characters at the specified positions defined by the indices.
For example :
fun main() {
val str = "The quick brown fox jumps over the lazy dog"
println(str.slice(1..14))
println(str.slice(20 downTo 1))
}
It will print :
he quick brown
j xof nworb kciuq eh
If the range is in reverse order, the final string is also reversed.
public inline fun String.slice(indices: Iterable): String :
This is another variant of slice that takes one Iterable. For example :
fun main() {
val str = "The quick brown fox jumps over the lazy dog"
println(str.slice(listOf(0,2,4,6,8,10)))
}
It will print :
Teqikb
The slice in this example creates one subarray by taking the characters at even indices from 0 to 10. We can create one list of indices and slice will return us one string by picking the characters at these indices.
Combining all examples :
fun main() {
val str = "The quick brown fox jumps over the lazy dog"
println(str.slice(1..14))
println(str.slice(20 downTo 1))
println(str.slice(listOf(0,2,4,6,8,10)))
}
Output :
he quick brown
j xof nworb kciuq eh
Teqikb
