JS strangeness

[Aaron Gray]

Aaron Gray meinte:


Dunno...

line 6:
var isIE = /*@cc_on!@*/false;

I guess it does that because shortly afterward it does:

var pushAll = function (set1, set2) {
for (var j=0, jL=set2.length; j<jL; j++) {
set1.push(set2[j]);
}
return set1;
};
if (isIE) {
pushAll = function (set1, set2) {
if (set2.slice) {
return set1.concat(set2);
}
for (var i=0, iL=set2.length; i<iL; i++) {
set1[set1.length] = set2;
}
return set1;
};
}

[...]

And why would one want to do something like that:

Because the author(s) do no know how to implement effective feature
detection?

How about:

var HTMLArray = function () {
// Constructor
};

...

if (isIE) {
HTMLArray = Array;
}
HTMLArray.prototype = [];
HTMLArray.prototype.each = function (functionCall) {


Which extends Array.prototype in IE with an each method, but in other
browsers extends a generic array object.

Yeah, there are bits of cruft in the code.

Aaron