Add Remove All Whitespace in Dart (TheRenegadeCoder#4979)

Author: gangaasoonu

archive/d/dart/remove-all-whitespace.dart

@@ -0,0 +1,12 @@
+// Issue 4973
+void main(List<String> argv){
+  const String error_message = "Usage: please provide a string";
+  if (argv.isEmpty || argv[0].isEmpty){
+    print(error_message);
+    return;
+  }
+  //Do not convert \r, \n and \t explicitly into carriage return, newline and tab, as per Jeremy inputs
+  // Use Regular Expressin to replace carriage return, newline and tab with empty string
+  String sentence_no_spaces = argv[0].replaceAll(RegExp(r'[\t\r\n ]'), '');
+  print(sentence_no_spaces);
+}