JAVASCRIPT

Deleting all white spaces in a string

.replaceAll(/s/g,'')

remove white spaces

//Extenion function
fun String.removeWhitespaces() = replace(" ", "")

// Uses
var str = "This is an example text".removeWhitespaces()

println(str)

remove all white spaces and different characters globally

str = text.toLowerCase().replace(/[^A-Za-z0-9]/g,'');