Idiom #147 Remove all non-ASCII characters

Create string t from string s, keeping only ASCII characters

string t = Regex.Replace(s, @"[^\u0000-\u007F]+", string.Empty);

import std.array;
import std.algorithm.iteration;
import std.ascii;

auto t = s.filter!(a => a.isASCII).array;

import "regexp"

re := regexp.MustCompile("[[:^ascii:]]")
t := re.ReplaceAllLiteralString(s, "")

var
  i: integer;
begin
  t := '';
  for i := 1 to length(s) do
    if s[i] < #128 then t := t + s[i];
end.

uses RegExpr;

var
  s,t: string;
begin
  t := ReplaceRegExpr('[^\u0000-\u007F]+', s, '', False);
end.

import re

t = re.sub('[^\u0000-\u007f]', '',  s)

t = s.gsub(/[^[:ascii:]]/, "")

t = s.gsub(/[[:^ascii:]]/, "")

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