utils/array.js

   1 export const ArrayFun = {
   2
   3   // Double array intialization
   4   init: function(size1, size2, initElem) {
   5     return [...Array(size1)].map(() => Array(size2).fill(initElem));
   6   },
   7
   8   range: function(min, max) {
   9     if (!max) {
  10       max = min;
  11       min = 0;
  12     }
  13     return [...Array(max - min).keys()].map(k => k + min);
  14   },
  15
  16   toObject: function(keys, values) {
  17     if (!Array.isArray(values))
  18       // Second argument is a scalar
  19       values = Array(keys.length).fill(values);
  20     return (
  21       ArrayFun.range(keys.length)
  22       .reduce((acc, curr) => (acc[keys[curr]] = values[curr], acc), {})
  23     );
  24   }
  25
  26 };