(javascript)自己的代码积累

js求时间差

//求多个时间段的分钟差function Calc(timesArray){var time=0;for(var i=0;i<timesArray.length;i++){var minutes=CalcMinutes(timesArray[i]);time+=minutes;} return time;}function CalcMinutes(times) {    var bTimeNum = new Date('1111/01/01 ' + times[0]).getTime();    var enTimeNum = new Date('1111/01/01 ' + times[1]).getTime();    var minutes=(enTimeNum-bTimeNum) /(60*1000)     return minutes;  }  //js 求时间差function DateDiff(beginTime,endTime){var diff=new Date(endTime).getTime()-new Date(beginTime).getTime();var days=Math.floor(diff/(24*3600*1000));var diff1=diff%(24*3600*1000);var hours=Math.floor(diff1/(3600*1000));var diff2=diff1%(3600*1000);var minutes=Math.floor(diff2/(60*1000));var diff3=diff2%((60*1000));var seconds=Math.round(diff3/1000);alert(" 相差 "+days+"天 "+hours+"小时 "+minutes+" 分钟"+seconds+" 秒");}

jquery判断数组是否含有某个元素

// jquery判断数组是否含有某个元素var arr = [ "xml", "html", "css", "js" ];  $.inArray("js", arr);  //返回 3,如果不包含在数组中,则返回 -1;

js生成两个数组的不同数组

function diffArray(arr1, arr2) {  var tmp = arr1.concat(arr2);   var arr3=[]; //临时数组  for(var s in arr1){    for(var x in arr2){        if(arr1[s]===arr2[x]){            arr3.push(arr1[s]);        }    }  }  tmp=tmp.filter(function(tmp){    if(arr3.indexOf(tmp)==-1){      return tmp    }  })  return tmp}   

//方法二 function diff(arr1, arr2) {  var newArr = arr1.concat(arr2);  function check(item) {    if (arr1.indexOf(item) === -1 || arr2.indexOf(item) === -1) {      return item;    }  }  return newArr.filter(check);}

js数组去重

//方法一Array.prototype.arrRdu= function(){this.sort();var re=[this[0]];for(var i = 1; i < this.length; i++){if( this[i] !== re[re.length-1]){re.push(this[i]);}}return re;}//方法二Array.prototype.arrRdu= function(){    var n = {}, r = [], len = this.length, val, type;      for (var i = 0; i < this.length; i++) {          val = this[i];          type = typeof val;          if (!n[val]) {              n[val] = [type];              r.push(val);          } else if (n[val].indexOf(type) < 0) {              n[val].push(type);              r.push(val);          }      }      return r;  }