Question

I have an array object in javascript. I would to select a particular field from all the rows of the object.

I have an object like

var sample = {
[Name:"a",Age:1],
[Name:"b",Age:2],
[Name:"c",Age:3]
}

I would like to get an output of only Names as ["a","b","c"] without looping over sample object.

How can I select one or two fields using jlinq? or any other plugin?

Thanks a lot.

Answer 1

You’ve got your definition the wrong way round. Instead of having an object containing 3 arrays, you want an array of objects.

like this:

var sample = [{Name:"a",Age:1},
   {Name:"b",Age:2},
   {Name:"c",Age:3}];

Then you can do:

var name0 = sample[0].Name;
var age0 = sample[0].Age;

or to get all your names as per your example:

var names = [sample[0].Name,sample[1].Name,sample[2].Name];

But, without looping im not sure how you would get any number of values…. why no looping?

Just say you do loop, here’s how you would do it:

var names = []
for(x in sample)
   names.push(sample[x].Name);

or with jQuery (which is still looping)

sample= jQuery.map(sample, function(n, i){
  return n.Name;
});