@mrtujiawei/utils

@mrtujiawei/utils

Table of Contents

• Installing
• Usage
  • note: Brower usage
  • note: CommonJS usage
  • note: ESModule usage
• Example
  • Stack
  • Queue
  • Lock
  • DateTimeTool

Installing

Using npm:

$ npm install @mrtujiawei/utils

Using yarn:

$ yarn add @mrtujiawei/utils

Using unpkg CDN:

<script src="https://unpkg.com/@mrtujiawei/utils/dist/utils.js"></script>

Usage

note: Brower usage

const { Stack } = utils.Stack;

note: CommonJS usage

const { Stack } = require('@mrtujiawei/utils');

or

const utils = require('@mrtujiawei/utils');
const Stack = utils.Stack;

note: ESModule usage

import { Stack } from '@mrtujiawei/utils';

or

import utils from '@mrtujiawei/utils';
const Stack = utils.Stack;

Example

使用示例

Stack

import { Stack } from '@mrtujiawei/utils';

const stack = new Stack();

stack.size;         // 0
stack.isEmpty();    // true

stack.push(1);      // [1]
stack.push(2, 3);   // [1, 2, 3]
stack.size;         // 3
stack.isEmpty();    // false

stack.pop();        // 3
stack.peak();       // 2
stack.pop();        // 2
stack.peak();       // 1
stack.pop();        // 1
stack.peak();       // throw Error: StackEmptyError
stack.pop();        // throw Error: StackEmptyError

Queue

import { Queue } from '@mrtujiawei/utils';

const queue = new Queue();

queue.size;         // 0
queue.isEmpty();    // true

queue.enqueue(1);   // [1]
queue.enqueue(2);   // [1, 2]
queue.dequeue();    // 1

queue.enqueue(3);   // [2, 3]

queue.size;         // 2
queue.isEmpty();    // false
queue.dequeue();    // 2
queue.dequeue();    // 3
queue.dequeue();    // throw Error: QueueEmptyError

Lock

异步流程加锁

import { Lock, sleep }  from '@/mrtujiawei/utils';

const lock = new Lock(1);

/**
 * 异步任务只有等上次任务结束后才会开始执行下一个异步任务
 */
const run = async (value, timeout) => {
  try {
    await lock.lock();
    // 异步任务
    await sleep(timeout);
    console.log(value);
  } finally {
    lock.unLock();
  }
};

run(0, 1000);
run(1, 100);
run(2, 0);

output: 0 1 2

DateTimeTool

日期时间处理类
解析时间太复杂，没做

import { DateTimeTool }  from '@/mrtujiawei/utils';

DateTimeTool.timeFormat(new Date(), ':');       // hh:mm:ss
DateTimeTool.dateFormat(new Date(), '-');       // yyyy-mm-dd