1 var colors = new Array(3);      //创建一个包含3项的数组2 var names = new Array("Greg");  //创建一个包含1项，即字符串“Greg”的数组

1 var colors = ["red", "blue", "green"];    //创建一个包含3个字符串的数组2 alert(colors.toString());    //red,blue,green3 alert(colors.valueOf());     //red,blue,green4 alert(colors);               //red,blue,green

1 var colors = ["red", "green", "blue"];2 alert(colors.join(","));      //red,green,blue3 alert(colors.join("||"));     //red||green||blue

1 var colors = ["red", "blue"];2 colors.push("brown");              //添加另一项3 colors[3] = "black";               //添加一项4 alert(colors.length);  //45         6 var item = colors.pop();           //取得最后一项7 alert(item);  //"black"

1 var colors = new Array();                      //创建一个数组2 var count = colors.push("red", "green");       //推入两项3 alert(count);  //24         5 count = colors.push("black");                  //推入另一项6 alert(count);  //37         8 var item = colors.shift();                     //取得第一项9 alert(colors.length);  //2

1 var values = [1, 2, 3, 4, 5];2 values.reverse();3 alert(values);       //5,4,3,2,1

 1 function compare(value1, value2) { 2     if (value1 < value2) { 3         return 1; 4     } else if (value1 > value2) { 5         return -1; 6     } else { 7         return 0; 8     } 9 }10 11 var values = [0, 1, 5, 10, 15];12 values.sort(compare);13 alert(values);    //15,10,5,1,0

1 var colors = ["red", "green", "blue"];2 var colors2 = colors.concat("yellow", ["black", "brown"]);3 4 alert(colors);     //red,green,blue        5 alert(colors2);    //red,green,blue,yellow,black,brown

1 var colors = ["red", "green", "blue", "yellow", "purple"];2 var colors2 = colors.slice(1);3 var colors3 = colors.slice(1,4);4         5 alert(colors2);   //green,blue,yellow,purple6 alert(colors3);   //green,blue,yellow

 1 var colors = ["red", "green", "blue"]; 2 var removed = colors.splice(0,1);              //删除第一项 3 alert(colors);     //green,blue 4 alert(removed);    //red，返回的数组中只包含一项 5          6 removed = colors.splice(1, 0, "yellow", "orange");  //从位置1开始插入两项 7 alert(colors);     //green,yellow,orange,blue 8 alert(removed);    //返回的是一个空数组 9 10 removed = colors.splice(1, 1, "red", "purple");    //插入两项，删除一项11 alert(colors);     //green,red,purple,orange,blue12 alert(removed);    //yellow，返回的数组中只包含 一项

 1 var numbers = [1,2,3,4,5,4,3,2,1]; 2  3 alert(numbers.indexOf(4));        //3 4 alert(numbers.lastIndexOf(4));    //5 5  6 alert(numbers.indexOf(4, 4));     //5 7 alert(numbers.lastIndexOf(4, 4)); //3    8 var person = { name: "Nicholas" }; 9 var people = [{ name: "Nicholas" }];10 var morePeople = [person];11 12 alert(people.indexOf(person));     //-113 alert(morePeople.indexOf(person)); //0

 1 var numbers = [1,2,3,4,5,4,3,2,1]; 2          3 var everyResult = numbers.every(function(item, index, array){ 4     return (item > 2); 5     }); 6          7     alert(everyResult);       //false 8          9 var someResult = numbers.some(function(item, index, array){10     return (item > 2);11     });12         13      alert(someResult);       //true

1 var numbers = [1,2,3,4,5,4,3,2,1];2         3 var filterResult = numbers.filter(function(item, index, array){4     return (item > 2);5     });6         7     alert(filterResult);   //[3,4,5,4,3]

1         var numbers = [1,2,3,4,5,4,3,2,1];2         3         var mapResult = numbers.map(function(item, index, array){4             return item * 2;5         });6         7         alert(mapResult);   //[2,4,6,8,10,8,6,4,2]