2677. Chunk Array

https://leetcode.com/problems/chunk-array/

Javascript

var chunk = function(arr, size) {
    const result = []
    arr.reduce((accu, value, index) => {
        let  current
        if (index % size === 0) {
            current = []
            accu.push(current)
        } else {
            current = accu[accu.length-1]
        }

        current.push(value)
        return accu
    }, result)
    return result
}

Typescript

function chunk(arr: any[], size: number): any[][] {
    const result = []
    arr.reduce((accu, value, index) => {
        let current: any[]
        if (index % size === 0) {
            current = []
            accu.push(current)
        } else {
            current = accu[accu.length-1]
        }

        current.push(value)
        return accu
    }, result)
    return result
};