CODEWITHSUNDEEP
javascriptjqueryperformance
Darkagelink
Darkagelink

Reputation: 645

merging array into one

I'm creating an array using "push"

so the result is [Object, Object]

in there the code looks like:

[Object, Object]
    0: Object
        type: Array[6]
    1: Object
       type: Array[4]

I would like to combine both object and get a result like this:

["Mike", "Matt", "Nancy", "Adam", "Jenny", "Carl", "Jim", "Issac", "Lee", "Won"]

I have no idea to get this to work, any suggestion?

code sample:

    dropdown: function(data) {
        var arr = [];

        $.each(data, function(key, value) {
            arr.push({
                type: value.type
            });
        });
    }

Upvotes: 1

Views: 61

Answers (4)

Adam Rackis
Adam Rackis

Reputation: 83358

You can concatenate one array onto another with concat. 

arr = arr.concat(otherArr);

Note that concat creates a new array, leaving the original unchanged, which is why you have to re-assign it.

Note - for three arrays, you can just keep passing them in.

var arr1 = [0,1];
var arr2 = [2,3];
var arr3 = [4,5];

arr1 = arr1.concat(arr2, arr3);

console.log(arr1);

Fiddle

EDIT

You mentioned having dynamic arrays. I'm not sure what you mean by that, but I'll note that if you have an arbitrary array of arrays, and you want them all concated, you can do this

var arr1 = [0,1];
var arr2 = [2,3];
var arr3 = [4,5];

var otherArrays = [arr2, arr3];

arr1 = Array.prototype.concat.apply(arr1, otherArrays);

console.log(arr1);

FIDDLE

Upvotes: 4

Barmar
Barmar

Reputation: 780798

A simple loop:

var result = [];
for (var i = 0; i < objects.length; i++) {
    $.merge(result, object[i].type);
}

Upvotes: 0

scrblnrd3
scrblnrd3

Reputation: 7416

Use concat, like this

arr1=["apple","orange","pineapple","pomegranate"];
arr2=["pizza","candy","chocolate","tasty"];
arr3=["food","drink"];
concatted=arr1.concat(arr2).concat(arr3);

You can keep chaining together arrays like that for as long as you want, until you run out of memory

Alternatively, you can just do this

concatted=arr1.concat(arr2,arr3);

If you want to remove duplicates, you can use this

Array.prototype.removeDuplicates=function(){
    var newArray=[];
    for(var i=0;i<this.length;i++){
        if(newArray.indexOf(this[i])==-1){
            newArray.push(this[i]);
        }
    }
    return newArray;
}

Upvotes: 1

Palpatim
Palpatim

Reputation: 9262

Since you specified that you can use jquery, check out the merge() function: http://api.jquery.com/jquery.merge/

Upvotes: 0

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