JAVASCRIPT

Deleting all white spaces in a string

.replaceAll(/s/g,'')

Remove whitespace from str

name = name.strip()

remove white spaces

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

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

println(str)

Remove White Space At Sides

$x = "  abc  ";
print(trim($x));

There are three versions of trim().
trim(): trims white space on both ends
rtrim(): trims white space on the right end
ltrim(): trims white space on the left end

Note that trim() does not remove white space in the middle of the string.