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Combining 2 arrays in JavaScript or Lodash

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Combining 2 arrays in JavaScript or Lodash

Anele Ngqandu

5yAsked Oct 6, 2021, 6:40 AM1k

Hi All

I have 2 arrays that I need to join them to make 1 array in this form below

array1=[1, 3, 4]

array2=[a, b, c]

NewArray=[a, 1], [b, 3],[c, 3]

4 Replies

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Satya Karki5y ago
Accepted answer
Hi,

Try this
var array1 = [1,2,3];

var array2 = [a,b,c];
let merged = [];

for(let i=0; i
  merged.push({array1[i],array2[i]});
}
+2
Sachin Singh5y ago
use this, this will give the cartesian product of any number of arrays not just 2.
function cartesianProduct(arr) {
    return arr.reduce(function(a,b){
        return a.map(function(x){
            return b.map(function(y){
                return x.concat([y]);
            })
        }).reduce(function(a,b){ return a.concat(b) },[])
    }, [[]])
}

var a = cartesianProduct([[1, 2,3], [a,b,c], [7, 8], [9,10]]);
console.log(JSON.stringify(a));
+3
Anele Ngqandu5y ago
Hi Satya

I get Uncaught SyntaxError: Unexpected token '[' there by line 7
+1
Rijwan Ansari5y ago
Hi
You can do in this way as well.
let arr1 = [1,2,3];

let arr2 = [a,b,c];

let arr3 = arr1.map((item, i) => Object.assign({}, item, arr2[i]));

console.log(arr3);
+2