Given a string describing a Javascript function. convert it to a Javascript function
- by brainjam
Say I've got a Javascript string like the following
var fnStr = "function(){blah1;blah2;blah3; }" ;
(This may be from an expression the user has typed in, duly sanitized, or it may be the result of some symbolic computation. It really doesn't matter).
I want to define fn as if the following line was in my code:
var fn = function(){blah1;blah2;blah3; } ;
How do I do that?
The best I've come up with is the following:
var fn = eval("var f = function(){ return "+fnStr+";}; f() ;") ;
This seems to do the trick, even though it uses the dreaded eval(), and uses a slightly convoluted argument. Can I do better? I.e. either not use eval(), or supply it with a simpler argument?
