I have two array one contains length of 20 & second is in length of 10
I want to add 2 objects from the second array after every 5 object from first: in example
const array = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]
const secondArray = [a,b,c,d,e,f,g,h,i.j]
So expected output should be: [1,2,3,4,5,a,b,6,7,8,9,10,c,d...etc]
Loop from 5 to the length of array, with steps of 5.
Then use splice() to insert the first 2 items from secondArray at the current iterator
const array = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]
const secondArray = ['a','b','c','d','e','f','g','h','i','j'];
const result = [ ...array ];
for (let i = 5; i < array.length; i += 5) {
result.splice(i, 2, ...secondArray.splice(0, 2))
}
console.log(result)[
1,
2,
3,
4,
5,
"a",
"b",
8,
9,
10,
"c",
"d",
13,
14,
15,
"e",
"f",
18,
19,
20
]
const arr = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]
const secondArray = ['a','b','c','d','e','f','g','h','i','j'];
const NR_CHUNK = 5;
const CHAR_CHUNK = 2;
const r = [];
for (let i = NR_CHUNK; i <= arr.length; i += NR_CHUNK) {
r.push(...arr.slice(i - NR_CHUNK, i), ...secondArray.slice(((i/NR_CHUNK) * CHAR_CHUNK) - CHAR_CHUNK, ((i / NR_CHUNK) * CHAR_CHUNK)));
}
console.log(r);
Output:
[
1, 2, 3, 4, 5, 'a', 'b', 6,
7, 8, 9, 10, 'c', 'd', 11, 12,
13, 14, 15, 'e', 'f', 16, 17, 18,
19, 20, 'g', 'h'
]
This doesn't change your original arrays.
