I have a situation where I get the data in an array and I have to convert that to multiple arrays... Like Matrix.
const array = [1,2,3,4,5,6,7,8,9]
the output should be:
[[1,3],[2,4],[5,7],[6,8],[9]]
this is what I have so far:
let i = 0;
const add = [];
while (i < list.length) {
add.push([list[i], list[i + 2]]);
i = i + 1;
}
return add;
Maybe try this one?
let i = 0;
const list = [1,2,3,4,5,6,7,8,9]
const add = [];
let newarr =[]
while (i < list.length) {
add.push([list[i], list[i + 2]]);
add.push([list[i+1],list[i+3]])
i +=4;
}
//remove undefined item from the array
newarr = add.map(arr=>arr.filter(item =>item != undefined)).filter(item=>item!="")
console.log(newarr)const array = [1,2,3,4,5,6,7,8,9];
const visitedIndex = [];
const newArray = [];
array.forEach((element, i) => {
if (!visitedIndex.includes(i)) {
if (array[i+2]) {
newArray.push([array[i], array[i+2]])
} else {
newArray.push([array[i]])
}
visitedIndex.push(i);
visitedIndex.push(i+2);
};
});
Lodash chunk if you don't mind.
Or you can use recursive approach in vanila js.
const array = [1,2,3,4,5,6,7,8,9];
const chunk = (arr, n) => arr.length ? [arr.slice(0, n), ...chunk(arr.slice(n), n)] : [];
console.log(chunk(array, 2));.as-console-wrapper{min-height: 100%!important; top: 0}