zhanhongtao

  grunt.registerMultiTask('delete', function(when, task) {
    var path = require( 'path' ), fs = require( 'fs' );
    var queue = function( list, fn, callback, index, ret ) {
      "use strict";
      index = index || 0;
      ret = ret || [];
      var next = function ( value, stop, returnCurrentValue ) {
        ret[ ret.length ] = value;
        if ( stop ) {
          return callback.apply( null, returnCurrentValue ? [value] : ret );

zhanhongtao

function f1() {
  var count = 1;
  var last = Date.now();
  var ret = [];
  setTimeout(function() {
    ret.push( Date.now() - last );
    var i = 0, c;
    while ( i++ < 100000 ) {
      c = document.getElementsByTagName( 'a' );
    }

zhanhongtao

var a = {
  x: 'x',
  y: 'y',
  z: ['x','y','z']
};
a.z1 = a.z; // 共享数据
a.a1 = a; // 环

console.log( a );

zhanhongtao

var a = Math.random() * 6 + 2;
var b = typeof a === 'number' && a > 5 && a - 5 || 'redky';
console.log( a, b );

zhanhongtao

var a = [ 1, 2, 3 ];

function change( a, i, j) {
   var t = a[i];
   a[i] = a[j];
   a[j] = t;
}

function permgen( a, n ) {
   n = n == null ? a.length : n;

zhanhongtao

var f;
f = function ( n ) {
    if ( n === 0 ) return 0;
    else 
        return n + f(n-1);
};

var a = f(3);
console.log( 'a: ', a );

zhanhongtao

var type = function(s) {
    return Object.prototype.toString.call(s).slice(8,-1).toLowerCase();
};

var log = function() {
  var color = 'background: #000;color: yellow;padding: 0 3px';
  var string = '%c';//'%c';
  for ( var i = 0, l = arguments.length; i < l; i++ ) {
      var t = type(arguments[i]);
      switch(t) {

zhanhongtao

    function removeDomByClass( classname ) {
      var boxes = document.getElementsByClassName( classname );
      for ( var i = 0, l = boxes.length; i < l; i++ ) {
        var box = boxes[0];
        if ( box && box.parentNode ) {
          box.parentNode.removeChild( box );
        }
      }
    }

zhanhongtao

/*
  @return {object}
  {
    on: 开权限
    off: 取消权限
    done: 有权限时, 执行操作
  }
*/
function create( func, check, time ) {
  var flag = false;

zhanhongtao

var result = 80;
var MAX_VALUE = 50;
var MIN_VALUE = 0;

// result 值不能小于 0
result = Math.max.call( Math, MIN_VALUE, result );

result = Math.min.apply( Math, [ MAX_VALUE, result ] );

console.log( result );