How to strip whitespace in string in TCL?

Question

I need to strip leading and trailing whitespace from a string in TCL. How?

Maletta

Answer 1

Try this -

      string trim string ?chars?

Returns a value equal to string except that any leading or trailing characters from the set given by chars are removed. If chars is not specified then white space is removed (spaces, tabs, newlines, and carriage returns).

Original Source :- http://wiki.tcl.tk/10174

Statolith

There's also string trimleft and string trimright when you only want to trim one end. – Scaremonger

Here's an example how the chars argument works: trim (english) vowels from the left and right of a string: set str "each patio"; puts [string trim $str "aeiou"] outputs ch pat – Timehonored

Answer 2

try this. this will remove all the withe spaces

[string map {" " ""} $a];

a is your string

Cattier

He only wants to strip leading and tailing whitespace. Also you don't remove other types of whitespace, like tabulator, newline... – Hobbism