JAVASCRIPT

javascript array split chunk

const chunk = (arr, size) => arr.reduce((acc, e, i) => (i % size ? acc[acc.length - 1].push(e) : acc.push([e]), acc), []);

// Examples
chunk([1, 2, 3, 4, 5, 6, 7, 8], 3);     // [[1, 2, 3], [4, 5, 6], [7, 8]]
chunk([1, 2, 3, 4, 5, 6, 7, 8], 4);     // [[1, 2, 3, 4], [5, 6, 7, 8]]

split array into chunks javascript

Array.prototype.chunk = function(size) {
    let result = [];
    
    while(this.length) {
        result.push(this.splice(0, size));
    }
        
    return result;
}

const arr = [1, 2, 3, 4, 5, 6, 7, 8, 9];
console.log(arr.chunk(2));

split array into chunks javascript

const splitArray=(arr, chunk)=>{
    const elementInEachSubArray = Math.floor(arr.length / chunk)
    const remainingElement = arr.length - (elementInEachSubArray * chunk)
    let splitArray = Array.from({length: chunk}, ()=>[])
    splitArray = splitArray.map(
        (array, i)=>{
            return arr.slice(i*elementInEachSubArray, elementInEachSubArray * (i + 1))
}
    ).map((array, i)=>[...array, arr[arr.length - remainingElement + i]].filter(Boolean))
    console.log(splitArray)
    
}