I have something like this, an array of arrays where each array has a 7 values
const arrays = [[1,2,3,4,5,6,7],[8,9,10,11,12,13,14]]
What's the most efficient way to split this into array of arrays where each array will have a 2 values and last array of arrays will hold the remaining 1 element, like this
[[1,2], [8,9]] [[3,4], [10,11]] [[5,6], [12,13]] [[7], [14]]
You can use array#reduce and array#forEach to split your array based on size.
const arr = [[1,2,3,4,5,6,7],[8,9,10,11,12,13,14]],
size = 2,
result = arr.reduce((r, a, i) => {
a.forEach((v,j) => {
const idx = Math.floor(j/size);
r[idx] = r[idx] || [];
r[idx][i] = r[idx][i] || [];
r[idx][i].push(v);
});
return r;
},[]);
console.log(result);.as-console-wrapper { max-height: 100% !important; top: 0; }It doesn't look that efficient, but it works.
const arrays = [[1,2,3,4,5,6,7],[8,9,10,11,12,13,14]];
// number of sub arrays
var numsubarr = Math.ceil(arrays[0].length / 2);
// parring up the vaules
var arr1 = arrays.map(arr => Array.from(Array(numsubarr).keys()).map(i => arr.slice(i*2, i*2+2)));
// combining the two arrays
var arr2 = Array.from(Array(numsubarr).keys()).map(i => [arr1[0][i],arr1[1][i]]);
console.log(arr2);