mathsteps/lib/util/Util.js

Step by step math solutions

/*
  Various utility functions used in the math stepper
 */
const Util = {};

// Adds `value` to a list in `dict`, creating a new list if the key isn't in
// the dictionary yet. Returns the updated dictionary.
Util.appendToArrayInObject = function(dict, key, value) {
  if (dict[key]) {
    dict[key].push(value);
  }
  else {
    dict[key] = [value];
  }
  return dict;
};

module.exports = Util;