Answers for "javascript add array to array at index"

2

javascript add item by index

// Be careful!

const arr = [ 1, 2, 3, 4 ];
arr[5] = 'Hello, world!';

console.log(arr); // [ 1, 2, 3, 4, <1 empty item>, 'Hello, world!' ]
console.log(arr.length); // 6
Posted by: Guest on May-31-2021
0

javascript add array to array at index

a1.splice(2, 0, ...a2);
Posted by: Guest on November-26-2020

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