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sas

v3.0.4

Published

The Callback Hell Terminator

Downloads

2,180

Readme

English Sas 3.0.3Sas 3.0.4

Sas 3

Sas是javascript的一个简单的可递归的异步控制库,它使用Array代表串行,使用Object代表并行,使用Function代表任务。串行和并行可无限嵌套,它将会递归执行,无论多深,都能返回你想要的结果。它很小,源代码在包含很多注释和空格的情况下,仍不到200行。

安装npm install sas

Demo: 使用sas寻找磁盘最深处

var fs = require('fs');
var sas = require('sas');
var rootDir = '/', depth = 0, deepestPath;

function readdir(cb, i) {
  var indexs = i.indexs(), path = rootDir + indexs.join('/');
  if (indexs.length > depth) { //record
    depth = indexs.length;
    deepestPath = path;
  }
  fs.readdir(path, function(err, files) {
    if (err || !files.length) return cb();
    var tasks = {}, i = 0, len = files.length;
    for (; i < len; i++) {
      tasks[files[i]] = path + '/' + files[i];
    }
    cb('$reload', tasks);
  });
}

function stat(path) { //iterator
  return function(cb) {
    fs.lstat(path, function(err, stat) {
      if (err || stat.isSymbolicLink()) return cb();
      if (stat.isDirectory()) {
        return cb('$reload', readdir);
      }
      cb();
    });
  }
}

console.log('Exploring disk\'s deepest depth...');
console.time('time cost');

sas(readdir ,stat, function() {
  console.log('Deepest depth:',  depth);
  console.log('Deepest path:', deepestPath);
  console.timeEnd('time cost');
});

这个demo会异步的浏览你硬盘上所有文件/文件夹,找出最深的那个。最后结束,并把结果告诉你。 如果你想知道sas是怎么做到的,请访问: sas 2 文档

sas 3 中文文档

sas 3 English docs

前端直接src

在本项目根目录下./dist有打包好的文件供前端使用,支持amd加载。如果没有amd的话,会暴露到全局一个变量:sas

浏览器支持

不支持8及更早版本的IE浏览器。