Kotlin replace multiple words in string

Question

How to replace many parts of a string with something else in Kotlin using .replace()

For example, we can do it only by replacing one word

fun main(args: Array<String>) {

    var w_text = "welcome his name is John"

    println("${w_text.replace("his","here")}")
}

and the result will be " welcome here name is John " .

finally we need the result be " welcome here name is alles "

by replacing his to here and john to alles using .replace()

Answer 1

For the ones interested in replacing a map of values in a text:

private fun replaceText(text: String, keys: Map<String, String>): String =
    val replaced = map.entries.fold(text) { acc, (key, value) -> acc.replace(key, value) }

Answer 2

Here is a one liner:

fun String.replace(vararg pairs: Pair<String, String>): String =
    pairs.fold(this) { acc, (old, new) -> acc.replace(old, new, ignoreCase = true) }

Test:

@Test fun rep() {

    val input = "welcome his name is John"

    val output = input.replace("his" to "her", "john" to "alles")

    println(output)

    output shouldBeEqualTo "welcome her name is alles"

}