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Alternatively merging two arrays - JavaScript
We are required to write a JavaScript function that takes in two arrays and merges the arrays taking elements alternatively from the arrays.
For example −
If the two arrays are −
const arr1 = [4, 3, 2, 5, 6, 8, 9]; const arr2 = [2, 1, 6, 8, 9, 4, 3];
Then the output should be −
const output = [4, 2, 3, 1, 2, 6, 5, 8, 6, 9, 8, 4, 9, 3];
Example
Following is the code −
const arr1 = [4, 3, 2, 5, 6, 8, 9]; const arr2 = [2, 1, 6, 8, 9, 4, 3]; const mergeAlernatively = (arr1, arr2) => { const res = []; for(let i = 0; i < arr1.length + arr2.length; i++){ if(i % 2 === 0){ res.push(arr1[i/2]); }else{ res.push(arr2[(i-1)/2]); }; }; return res; }; console.log(mergeAlernatively(arr1, arr2));
Output
This will produce the following output in console −
[ 4, 2, 3, 1, 2, 6, 5, 8, 6, 9, 8, 4, 9, 3 ]
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