Find multiple object values in array

Question

This is my object:

function Plane (x,z) {  
    this.x = x;
    this.z = z;
}

var plane = new Plane(0,50000);

I have an array with these objects:

planesArray.push(plane);

I have a point object:

function Point (x,z) {  
    this.x = x;
    this.z = z;
}

var point = new Point(0,-50000);

I need to check if in planesArray exist an object with the specific point, so to check if the values x and y of the point are equal to any of the planes in the array and, if NOT, to perform an action.

I am still a novice, I apologize if this question sounds dumb.

Now, is there a nice way do do the same but with 6 (or more) points, without repeating? — killingzoe
– killingzoe, Commented Feb 9, 2013 at 17:07

David G · Accepted Answer · 2013-02-11 18:05:48Z

2

Loop through the array and return a boolean indicating whether or not there was found a Point object with those attributes. This example uses the .some method to perform this operation.

var found = planesArray.some(function(plane) {
    return plane.x === x && plane.y === y;
});

if (found) {

}

Update: Here is the same code as a function.

function found(list, x, y) {
    return list.some(function(plane) {
        return plane.x === x && plane.y === y;
    });
}

edited Feb 11, 2013 at 18:05

answered Feb 9, 2013 at 16:48

David G

97.6k41 gold badges173 silver badges258 bronze badges

Sign up to request clarification or add additional context in comments.

10 Comments

pimvdb Over a year ago

For existence, .some is enough. Also, you need ===.

David G Over a year ago

@pimvdb Thanks. I will incorporate that into my answer.

osahyoun Over a year ago

Just keep in mind, Array.prototype.some is not compatible with IE8 and under - kangax.github.com/es5-compat-table

wxactly Over a year ago

The only answer given that didn't actually work across all browsers, and it was the answer that was accepted. Um...

David G Over a year ago

@wxactly Have you read the About page: Accepting doesn't mean it's the best answer, it just means that it worked for the person who asked. I realize this isn't cross browser, but if it's a viable and helpful solution to the OP then I see no reason to withhold my answer.

|

wxactly · Accepted Answer · 2013-02-09 16:48:19Z

0

var point = new Point(0,-50000);
for(var i = 0; i < planesArray.length; i++) {
    var plane = planesArray[i];
    if(plane.x != point.x || plane.z != point.z) {
        //perform action
        //break; //optional, depending on whether you want to perform the action for all planes, or just one
    }
}

answered Feb 9, 2013 at 16:48

wxactly

2,4801 gold badge28 silver badges44 bronze badges

Collectives™ on Stack Overflow

Find multiple object values in array

2 Answers 2

10 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

10 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related