ExtJS Array使用详细介绍

/**

 * extjs Array使用详细介绍

 */

(function() {

 Ext.onReady(function() {

  // 1

  var myArray = [1, 2, 3, 4, -3, -4];

  Ext.Array.every(myArray, function(item) {

     if (item > 0) {

      return true;

     } else {

      // alert(item);

      return false;

     }

    }, this);

  // 2

  var newArray = Ext.Array.filter(myArray, function(item) {

     if (item > 0) {

      return true;

     } else {

      return false;

     }

    }, this);

  // alert(newArray.join("\n"));

  // 3

  Object.prototype.get = function(key, defv) {

   if (this[key]) {

    return this[key];

   } else {

    if (defv) {

     return defv;

    }

   }

  }

  var person = {

   name : 'uspcat',

   age : 26

  }

   // alert(person['age']);

   // alert(person.get('name'))

  });

 // 4 Concatenating two or three arrays

 var alpha = ["a", "b", "c"];

 var numeric = [1, 2, 3];

 var num3 = [7, 8, 9];

 var alnum = alpha.concat(numeric);

 // alert(alnum)

 var alnu3 = alpha.concat(numeric, num3);

 // alert(alnu3);

 // 5 Concatenating values to an array

 var alphas = ['a', 'b', 'c'];

 var alnumeric = alphas.concat(1, [2, 3]);

 // alert(alnumeric);

 // 6 用一个字符串连接一个数组中所有元素

 var a = new Array("wind", "Rain", "Fire");

 var myVar1 = a.join();

 // alert(myVar1);

 var myVar2 = a.join(",");

 // alert(myVar2);

 var myVar3 = a.join("+");

 // alert(myVar3);

 // 7 The pop method removes the last element from an array and returns that

 // value to the caller.

 var myFish = ["angel", "clown", "mandarin", "surgeon"];

 var popped = myFish.pop();

 // alert(popped); //返回结果 surgeon

 // 8 Adds one or more elements to the end of an array and returns the new

 // length of the array.

 var sports = ["soccer", "baseBall"];

 var arrlen = sports.push("football", "swimming")

 // alert(arrlen);// 返回长度 ４

 // 9数组元素翻转(顺序倒置)

 var myArray = ["one", "two", "three"];

 myArray.reverse();

 // alert(myArray);// 结果three,two,one

 // 10 移除第一个元素从一个数组，并返回那移除的那个元素

 var myFishs = ["angel", "clown", "mandarin", "surgeon"];

 // console.log("before: " + myFishs);

 var shifted = myFishs.shift();

 // console.log("after: " + myFishs);

 // console.log("the removed element: " + shifted);

 // 11数组元素的排序(从小到大)

 /*

  * function compareNumbers(a,b){ return a-b;

  */

 var numbers = [4, 2, 5, 3, 6, 0];

 numbers.sort(function(a, b) {

    return a - b;

   });

 // console.log(numbers);

 // 12 数组转字符串(Returns a string representing the array and its elements.

 // Overrides the Object.prototype.toString method.)

 var monthNames = new Array("Jan", "Feb", "Mar", "Apr");

 monthNames.toString();

// console.log(monthNames);

 // 13 Adds one or more elements to the front of an array and returns the new

 // length of the array.

 var myFishh = ["angel", "clown"];

 console.log("before:"+myFishh);

 var unshiftedd = myFishh.unshift("drum", "lion");

 console.log("after:"+myFishh);

 console.log("New length of array:"+unshiftedd);

})();