underscore.js 可以把一个一维数组拆分成二维数组吗？

Question

比如arr1 = [1,2,3,4,5,6,7,8,9,10];按每三个一组拆分想得到arr2 = [[1,2,3],[4,5,6],[7,8,9],[10]];

Answer 1

var arr =[1,2,3,4,5,6,7,8,9,10];

var result = _.toArray(_.groupBy(arr, function(num, index){ return Math.floor(index/3);}));