I am trying to find the index of an object in an array in jquery. I cannot use jQuery.inArray because i want to match objects on a certain property. I am using:
jQuery.inObjectArray = function(arr, func)
{
for(var i=0;i<arr.length;i++)
if(func(arr[i]))
return i;
return -1;
}
and then calling:
jQuery.inObjectArray([{Foo:"Bar"}], function(item){return item.Foo == "Bar"})
Is there a built in way?
Not sure why each() doesn't work for you:
BROKEN -- SEE FIX BELOW
function check(arr, closure)
{
$.each(arr,function(idx, val){
// Note, two options are presented below. You only need one.
// Return idx instead of val (in either case) if you want the index
// instead of the value.
// option 1. Just check it inline.
if (val['Foo'] == 'Bar') return val;
// option 2. Run the closure:
if (closure(val)) return val;
});
return -1;
}
Additional example for Op comments.
Array.prototype.UContains = function(closure)
{
var i, pLen = this.length;
for (i = 0; i < pLen; i++)
{
if (closure(this[i])) { return i; }
}
return -1;
}
// usage:
// var closure = function(itm) { return itm.Foo == 'bar'; };
// var index = [{'Foo':'Bar'}].UContains(closure);
Ok, my first example IS HORKED. Pointed out to me after some 6 months and multiple upvotes. : )
Properly, check() should look like this:
function check(arr, closure)
{
var retVal = false; // Set up return value.
$.each(arr,function(idx, val){
// Note, two options are presented below. You only need one.
// Return idx instead of val (in either case) if you want the index
// instead of the value.
// option 1. Just check it inline.
if (val['Foo'] == 'Bar') retVal = true; // Override parent scoped return value.
// option 2. Run the closure:
if (closure(val)) retVal = true;
});
return retVal;
}
The reason here is pretty simple... the scoping of the return was just wrong.
At least the prototype object version (the one I actually checked) worked.
Thanks Crashalot. My bad.
$(arr).each()
