Javascript String.replace(): undocumented feature

[Michael_Rosenstein]

ESTK object model viewer describes string.replace() function as following:

String.replace (what: any, with: string):

string Core JavaScript Classes

what: Data Type: any

with: Data Type: string

But as you probably know, this function doesn't replace all occurences in a string.

var s = 'old old old';
var ss = s.replace('old', 'new');
$.writeln(ss);

Result: new old old

Therefore I have always used a regular expression with 'g' flag as 1st argument to replace all occurences in a string:

var s = 'old old old';
var sss = s.replace(/old/g, 'new');
$.writeln(sss);

Result: new new new

But as I discovered recently, we can still use the default syntax if we use regular expression flag(s) as third argument:

var s = 'old old old';
var ssss = s.replace('old', 'new', 'g');
$.writeln(ssss);

Result: new new new

Maybe someone will find it useful 🙂

[michaels72175479]

very useful, thank you!

[Robert at ID-Tasker]

Found only this:

http://www.thespanner.co.uk/2010/09/27/string-replace-javascript-bad-design/