CODEWITHSUNDEEP
javascriptarrays
Mr.Smithyyy
Mr.Smithyyy

Reputation: 1329

Join two object arrays with google map coordinates

I have two object arrays that have similar values but I cannot figure out how to merge them.

var Cars = [{
    lat: 42,
    lng: -72
}, {
    lat: 40.7127837,
    lng: -74.0059413
}, {
    lat: 40.735657,
    lng: -74.1723667
}];

var Trucks = [{
    lat: 43,
    lng: -72.5
}, {
    lat: 40.612837,
    lng: -74.1239413
}, {
    lat: 40.564657,
    lng: -74.1803667
}];

I have tried the code below but all I get in the console is a bunch of objects no values.

var Vehicles = Cars.concat(Trucks);

for (var i = 0; i < Vehicles.length; i++)
{
    console.log(Vehicles[i]);
}

Upvotes: 0

Views: 81

Answers (1)

Gian Marco Toso
Gian Marco Toso

Reputation: 12136

Array.prototype.push.apply(Cars, Trucks)

EDIT: Explanation

Both Cars and Trucks are arrays. The push function on the Array prototype receives as many parameters as you want and pushes each of them into an array. For example:

var a = [1,2];
a.push(3,4,5);
console.log(a); // => [1,2,3,4,5]

When calling apply on any function, you specify two things: the value of the this variable within the function, and an array containing the list of parameters being passed on the function. Therefore calling 

Array.prototype.push.apply(a, [3,4,5])

will call the push function on the a array, by passing it three parameters: 3, 4 and 5.

EDIT 2: Please note that doing this will overwrite the original array (the one being pass as the first parameter to the apply function call).

Upvotes: 1

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