CODEWITHSUNDEEP
javascriptjquery
user1476585
user1476585

Reputation: 81

Combining 2 arrays in javascript

I have 2 arrays in javascript. 

            var A = ['c++', 'java', 'c', 'c#', ...];
            var B = [12, 3, 4, 25, ...];

Now from these 2 arrays i want to create another array like :

  [['c++',12], ['java',3], ['c',4], ['c#', 25] ...];

Both A and B arrays are variable length in my case so how can i do this?

Upvotes: 1

Views: 178

Answers (4)

jjordan
jjordan

Reputation: 183

I think that using a hashMap instead of 2 arrays could be a good solution for you.

In example, you could do something like the following:

var h = new Object(); // or just {}
h['c++'] = 12;
h['java'] = 3;
h['c'] = 4;

Take a look at:

http://www.mojavelinux.com/articles/javascript_hashes.html

Upvotes: 0

amd
amd

Reputation: 21442

function Merge(A,B){
    var length = Math.min(A.length,B.length);
    var result = [];
    for(var i=0;i<length;i++){
     result.push([ A[i], B[i] ]) 
    }

    return result;
}

Upvotes: 1

Florent
Florent

Reputation: 12420

You can use this snippet if you don't to use any third party library:

var i = 0
  , n = A.length
  , C = [];

for (; i < n; i++) {
    C.push([A[i], B[i]]);
}

Upvotes: 3

Otto Allmendinger
Otto Allmendinger

Reputation: 28268

Underscore.js is good at that:

_.zip(*arrays)

Merges together the values of each of the arrays with the values at the corresponding position. Useful when you have separate data sources that are coordinated through matching array indexes. If you're working with a matrix of nested arrays, zip.apply can transpose the matrix in a similar fashion.

_.zip(['moe', 'larry', 'curly'], [30, 40, 50], [true, false, false]);
=> [["moe", 30, true], ["larry", 40, false], ["curly", 50, false]]

Upvotes: 3

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