say I have an array
var test = [{a: 26, b:14, c:null},{d:67, e: 8}];
say I want the value of c, I don't know what value c will have or which array will have c;
I was thinking of using $.grep but it does seem like I could use it in that way
So how do I go about getting the value of c?
EDIT
Just test as per my comment you can do
$.grep(test,function(e){return e.hasOwnProperty('c')})
This will return the array that has the object/objects of the property you want
You'll want to make use of hasOwnProperty here:
for (var i = 0; i < test.length; i++) {
if (test[i].hasOwnProperty('c')) {
alert(test[i].c); // do something with test[i].c
break; // assuming there is only ever 1 item called c, once we find it we can break out of the whole loop.
}
}
As you suggested, $.grep would work too:
var objectsThatHaveC = $.grep(test, function(obj) {
return obj.hasOwnProperty('c');
});
if (objectsThatHaveC.length) {
alert(objectsThatHaveC[0].c); // assuming there's only 1 object with a 'c', otherwise you'd still have to loop here
}
) for if. Other than that, this works good.
var objThatHasC = $.grep(test, function(obj) { return obj.hasOwnProperty('c') }); alert(objThatHasC.c);. Your right, maybe that would be easier than the loop ;-) adding it to my answer.$.grep would return an array, so you'd then need to do objectsThatHaveC[0].c. See updated answer.
test.filter(function(x){return "c" in x}).map(function(x){return x.c}).forEach(alert)- or, with jQuery,$.each($.map($.grep(test, function(x){return "c" in x}), function(x){return x.c}), alert)