Errors in Javascript can be irritating sometimes, so I thought I’d start posting when I ran across one that didn’t show up when I googled for it. Here’s my first one, it’s a simple error thrown by dojo.forEach.
I got this very descriptive error message in my console: “Error: No match found”.
Firebug Error for Dojo.forEach
I stared at it and then my code for a while before realizing that I had a reference to “this” inside my forEach loop, without giving the scope. I’d written:
1 2 3 | dojo.forEach(array, function(entry){ this.something; }); |
When what I should have written was:
1 2 3 | dojo.forEach(array, function(entry){ this.something; }, this); |
The third parameter here, “this”, gave the scope forEach needed to be able to access the scope in the loop.