How to remove whitespace from a string

[Paul Backus]

On Thursday, 16 January 2020 at 13:36:10 UTC, Namal wrote:
> Hello, what is the way to remove whitespace from a string (not 
> only at the beginning and end)..

import std.algorithm: filter;
import std.uni: isWhite;
import std.stdio: writeln;

void main()
{
     string s = " hello world ! ";
     writeln(s.filter!(c => !c.isWhite));
     // prints: helloworld!
}