MemoryFn

[wangweida]

import _ from 'lodash'

export const memoryFn = (fn) => {
  let cachedArg;
  let cachedRes;
  return function(arg) {
    if (_.isEqual(arg, cachedArg)) return cachedRes
    cachedArg = arg
    cachedRes = fn.apply(this, arg)
    return cachedRes
  }
}