javascript convert array to matrix
function listToMatrix(list, elementsPerSubArray) { var matrix = [], i, k; for (i = 0, k = -1; i < list.length; i++) { if (i % elementsPerSubArray === 0) { k++; matrix[k] = []; } matrix[k].push(list[i]); } return matrix; }
Turn array items to matrix javascript
myArr.reduce((rows, key, index) => (index % 3 == 0 ? rows.push([key]) : rows[rows.length-1].push(key)) && rows, []);
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