JavaScript数组及常见操作方法小结 - javascript

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//¶ÔÏóµÄÊµÀý´´½¨
var aList = new Array(1,2,3);
//Ö±½ÓÁ¿´´½¨
var aList2 = [1,2,3,'asd'];

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1¡¢»ñÈ¡Êý×éµÄ³¤¶È£ºaList.length;

var aList = [1,2,3,4];
alert(aList.length); // µ¯³ö4

2¡¢ÓÃÏÂ±ê²Ù×÷Êý×éµÄÄ³¸öÊý¾Ý£ºaList[0];

var aList = [1,2,3,4];
alert(aList[0]); // µ¯³ö1

3¡¢join() ½«Êý×é³ÉÔ±Í¨¹ýÒ»¸ö·Ö¸ô·ûºÏ²¢³É×Ö·û´®

var aList = [1,2,3,4];
alert(aList.join('-')); // µ¯³ö 1-2-3-4

4¡¢push() ºÍ pop() ´ÓÊý×é×îºóÔö¼Ó³ÉÔ±»òÉ¾³ý³ÉÔ±

var aList = [1,2,3,4];
aList.push(5);
alert(aList); //µ¯³ö1,2,3,4,5
aList.pop();
alert(aList); // µ¯³ö1,2,3,4

5¡¢unshift()ºÍ shift() ´ÓÊý×éÇ°ÃæÔö¼Ó³ÉÔ±»òÉ¾³ý³ÉÔ±

var aList = [1,2,3,4];
aList.unshift(5);
alert(aList); //µ¯³ö5,1,2,3,4
aList.shift();
alert(aList); // µ¯³ö1,2,3,4

6¡¢reverse() ½«Êý×é·´×ª

var aList = [1,2,3,4];
aList.reverse();
alert(aList); // µ¯³ö4,3,2,1

7¡¢indexOf() ·µ»ØÊý×éÖÐÔªËØµÚÒ»´Î³öÏÖµÄË÷ÒýÖµ

var aList = [1,2,3,4,1,3,4];
alert(aList.indexOf(1));

8¡¢splice() ÔÚÊý×éÖÐÔö¼Ó»òÉ¾³ý³ÉÔ±

var aList = [1,2,3,4];
aList.splice(2,1,7,8,9); //´ÓµÚ2¸öÔªËØ¿ªÊ¼£¬É¾³ý1¸öÔªËØ£¬È»ºóÔÚ´ËÎ»ÖÃÔö¼Ó'7,8,9'Èý¸öÔªËØ
alert(aList); //µ¯³ö 1,2,7,8,9,4

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var aList = [[1,2,3],['a','b','c']];

alert(aList[0][1]); //µ¯³ö2;

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