multipleCacheMemoize

multipleCacheMemoize.js

/* eslint-disable */
import { createSelectorCreator } from 'reselect';

function execFunc(func, ...args) {
  return func(...args);
}

function multipleCacheMemoize(func) {
  const argsArray = [];
  const resultArray = [];

  function matchArgs(args) {
    let targetIndex = -1;
    const argsArrayLen = argsArray.length;
    const argsLen = args.length;
    for(let index = 0; index < argsArrayLen; index++) {
      const values = argsArray[index];
      if (values.length === argsLen) {
        let match = true;

        for(let i = 0; i < argsLen; i++) {
          if (args[i] !== values[i]) {
            match = false;
            break;
          }
        }
        if (match) {
          targetIndex = index;
          break;
        }
      }
    }
    return targetIndex;
  }

  return (...args) => {
    const list = [...args];
    let index = matchArgs(list);
    if (index < 0) {
      const result = execFunc(func, ...args);
      argsArray.push(list);
      resultArray.push(result);
      index = argsArray.length - 1;
    }
    return resultArray[index];
  };
}


export const multipleCacheSelectorCreator = createSelectorCreator(multipleCacheMemoize);