{"id":731,"date":"2011-06-01T13:17:13","date_gmt":"2011-06-01T13:17:13","guid":{"rendered":"http:\/\/fdream.net\/blog\/?p=731"},"modified":"2011-06-01T13:17:13","modified_gmt":"2011-06-01T13:17:13","slug":"%e4%b9%9f%e8%b0%88javascript%e4%bb%a3%e7%a0%81%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96","status":"publish","type":"post","link":"https:\/\/fdream.net\/blog\/article\/731","title":{"rendered":"\u4e5f\u8c08JavaScript\u4ee3\u7801\u6027\u80fd\u4f18\u5316"},"content":{"rendered":"

\u5dee\u4e0d\u591a\u4e24\u5e74\u524d\u5199\u4e86\u4e2a\u9009\u62e9\u5668whiz<\/a>\uff0c\u9664\u5728DOM\u67e5\u627e\u65b9\u9762\u505a\u4e86\u8bb8\u591a\u4f18\u5316\u5de5\u4f5c\u4e4b\u5916\uff0c\u8fd8\u5728\u4ee3\u7801\u4f18\u5316\u4e0a\u505a\u4e86\u5f88\u591a\u5de5\u4f5c\uff0c\u4e00\u76f4\u6ca1\u6709\u5206\u4eab\u3002\u62bd\u7a7a\u603b\u7ed3\u4e00\u4e0b\uff0c\u57fa\u672c\u4e0a\u5728jQuery\u3001Mootools\u548cYUI\u7684\u6e90\u7801\u91cc\u9762\u90fd\u53ef\u4ee5\u770b\u5230\u8fd9\u4e9b\u5199\u6cd5\u3002\u6709\u4e9b\u662f\u5df2\u7ecf\u5728\u7f51\u4e0a\u5206\u4eab\u5f88\u591a\u904d\u4e86\uff0c\u4f17\u6240\u5468\u77e5\u7684\uff0c\u4e5f\u6709\u4e00\u4e9b\u53ef\u80fd\u5199\u4e86\u591a\u5e74\u7684JavaScript\u7684\u5f00\u53d1\u4eba\u5458\u4e5f\u4e0d\u4e00\u5b9a\u60f3\u5f97\u5230\u7684\u3002\u5982\u679c\u6709\u8bf4\u5f97\u4e0d\u6b63\u786e\u7684\u5730\u65b9\uff0c\u8fd8\u8bf7\u5927\u5bb6\u6307\u51fa\u3002\u8fd8\u6709\u7279\u522b\u8bf4\u660e\u7684\u662f\uff0c\u5176\u4e2d\u67d0\u4e9b\u5199\u6cd5\u4e0d\u662f\u5f88\u63a8\u8350\uff0c\u867d\u7136\u4ee3\u7801\u7b80\u6d01\u4e86\uff0c\u4f46\u662f\u6709\u53ef\u80fd\u9020\u6210\u9605\u8bfb\u56f0\u96be\u3002<\/p>\n

1.\u5c3d\u91cf\u4f7f\u7528\u6e90\u751f\u65b9\u6cd5\uff08Native Method\uff09<\/h3>\n

js\u662f\u89e3\u91ca\u6027\u8bed\u8a00\uff0c\u76f8\u6bd4\u7f16\u8bd1\u6027\u8bed\u8a00\u6267\u884c\u901f\u5ea6\u8981\u6162\u3002\u5982\u679c\u6d4f\u89c8\u5668\u5df2\u7ecf\u5b9e\u73b0\u4e86\u8be5\u65b9\u6cd5\uff0c\u5c31\u4e0d\u8981\u518d\u7528js\u518d\u53bb\u5b9e\u73b0\u4e00\u904d\u4e86\u3002\u53e6\u5916\uff0c\u7edd\u5927\u90e8\u5206\u60c5\u51b5\u4e0b\uff0c\u6d4f\u89c8\u5668\u5df2\u7ecf\u5b9e\u73b0\u7684\u65b9\u6cd5\u5df2\u7ecf\u5728\u7b97\u6cd5\u65b9\u9762\u505a\u4e86\u5f88\u591a\u4f18\u5316\uff0c\u518d\u91cd\u590d\u5b9e\u73b0\u4e00\u904d\u53ea\u662f\u6d6a\u8d39\u65f6\u95f4\u548c\u7cbe\u529b\u8fd8\u6709\u5e26\u5bbd\u3002\u5f53\u7136\uff0c\u5982\u679c\u4f60\u53ea\u662f\u4e3a\u4e86\u7ec3\u4e60\u7b97\u6cd5\uff0c\u90a3\u53e6\u5f53\u522b\u8bba\u3002<\/p>\n

2.\u5c3d\u53ef\u80fd\u51cf\u5c11\u5faa\u73af\u6b21\u6570<\/h3>\n

\u4ee3\u7801\u7684\u74f6\u9888\u5927\u591a\u5728\u5faa\u73af\uff0c\u5c11\u4e00\u5c42\u5faa\u73af\uff0c\u5c31\u80fd\u6570\u500d\u5730\u63d0\u9ad8\u6027\u80fd\u3002\u5982\u679c\u8981\u5bf9\u4e00\u4e2a\u6570\u7ec4\u7684\u6bcf\u4e2a\u5143\u7d20\u8fdb\u884c\u591a\u6b21\u64cd\u4f5c\uff0c\u5c3d\u53ef\u80fd\u4f7f\u7528\u4e00\u6b21\u5faa\u73af\uff0c\u591a\u6b21\u64cd\u4f5c\uff0c\u800c\u4e0d\u662f\u591a\u6b21\u5faa\u73af\uff0c\u6bcf\u6b21\u5faa\u73af\u6267\u884c\u4e00\u6b21\u64cd\u4f5c\u3002\u5c24\u5176\u662f\u5728\u8fdb\u884c\u591a\u4e2a\u6b63\u5219\u5339\u914d\u7684\u65f6\u5019\uff0c\u5c3d\u53ef\u80fd\u5408\u5e76\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u5728\u4e00\u6b21\u904d\u5386\u4e2d\u5c3d\u53ef\u80fd\u627e\u5230\u76f8\u5e94\u7684\u5339\u914d\u3002<\/p>\n

3.\u5faa\u73af\u7684\u53e6\u5916\u4e00\u79cd\u5199\u6cd5<\/h3>\n

\u901a\u5e38\u5faa\u73af\u7684\u5199\u6cd5\uff1a<\/p>\n

var objs = [obj1, obj2, obj3], i = 0; len = objs.length;\r\nfor(i = 0; i < len; i++){\r\n    dosth(obj);\r\n}<\/pre>\n
\u5f53\u5faa\u73af\u904d\u5386\u7684\u5bf9\u8c61\u662fobject\u65f6\uff0c\u53ef\u4ee5\u91c7\u7528\u4e0b\u9762\u7684\u65b9\u5f0f\u6765\u5199\uff1a<\/p>\n
var objs = [obj1, obj2, obj3], obj, i = 0;\r\nwhile(obj = objs[i++]){\r\n    dosth(obj);\r\n}<\/pre>\n
\u7279\u522b\u6ce8\u610f\uff0c\u5982\u679c\u4f60\u7684\u6570\u7ec4\u91cc\u9762\u6709\u53ef\u80fd\u51fa\u73b00, false, null\u7b49\u7b49\u5728\u6761\u4ef6\u5224\u65ad\u4e3afalse\u7684\u503c\uff0c\u8fd9\u79cd\u5199\u6cd5\u662f\u4e0d\u6b63\u786e\u7684\u3002<\/p>\n
4.\u67d0\u4e9b\u60c5\u51b5\u4e0bswitch\u7684\u53e6\u5916\u4e00\u79cd\u5199\u6cd5<\/h3>\n
\u901a\u5e38\u7684switch\u5199\u6cd5\uff1a<\/p>\n
function fun_a(){}\r\nfunction fun_b(){}\r\nfunction fun_c(){}\r\nswitch(con){\r\n    case 'a':\r\n        fun_a();\r\n        break;\r\n    case 'b':\r\n        fun_b();\r\n        break;\r\n    case 'c':\r\n        fun_c();\r\n        break;\r\n}<\/pre>\n
\u53e6\u5916\u4e00\u79cd\u5199\u6cd5\uff1a<\/p>\n
function fun_a(){}\r\nfunction fun_b(){}\r\nfunction fun_c(){}\r\nvar funs = {\r\n        'a': fun_a,\r\n        'b': fun_b,\r\n        'c': fun_c\r\n    };\r\nfuns[con]();<\/pre>\n
\u53d6\u503c\u6216\u8005\u51fd\u6570\u8c03\u7528\u90fd\u53ef\u4ee5\u7528\u7c7b\u4f3c\u7684\u65b9\u5f0f\u6765\u505a\u3002<\/p>\n
5.\u6761\u4ef6\u5224\u65ad\u7684\u53e6\u5916\u4e00\u79cd\u5199\u6cd5<\/h3>\n
\u901a\u5e38\u60c5\u51b5\u4e0b\uff1a<\/p>\n
if(a){\r\n  dosth();\r\n}<\/pre>\n
\u53ef\u4ee5\u8fd9\u6837\u5199\uff1a<\/p>\n
a && dosth();<\/pre>\n
6.\u521b\u5efa\u5bf9\u8c61\u7684\u53e6\u5916\u4e00\u4e2a\u529e\u6cd5\uff0c\u4e0d\u4f7f\u7528new<\/h3>\n
\u5f88\u591a\u65f6\u5019\uff0c\u6211\u4eec\u8981\u8fde\u7eed\u521b\u5efa\u4e00\u4e9b\u7b80\u5355\u7684object\u5bf9\u8c61\uff0c\u5e76\u4e14\u62e5\u6709\u9ed8\u8ba4\u7684\u5c5e\u6027\uff0c\u5f88\u591a\u4eba\u4f1a\u8fd9\u4e48\u5199\uff1a<\/p>\n
function Klass(){\r\n    this.prop_a = '';\r\n    this.prop_b = [];\r\n    this.prop_c = 0;\r\n}\r\nvar objs = [], i = 0, obj;\r\nwhile(i<100){\r\n    obj = new Klass();\r\n    obj.prop_c = i;\r\n    objs.push(obj);\r\n}<\/pre>\n
\u6362\u79cd\u5199\u6cd5\u770b\u770b\uff1a<\/p>\n
function create(){\r\n    return {\r\n        prop_a : '',\r\n        prop_b : [],\r\n        prop_c : 0\r\n    };\r\n}\r\nvar objs = [], i = 0, obj;\r\nwhile(i<100){\r\n    obj = create();\r\n    obj.prop_c = i;\r\n    objs.push(obj);\r\n}<\/pre>\n
\u5f53\u7136\u8fd8\u6709\u76f4\u63a5\u58f0\u660e\u7684\u65b9\u5f0f\uff0c\u4f46\u662f\u590d\u7528\u6027\u4f1a\u5dee\u4e00\u4e9b\u3002<\/p>\n
7.\u7528\u6765\u505a\u6807\u8bb0\u7684\u53d8\u91cf\u5c3d\u53ef\u80fd\u4f7f\u7528\u5e03\u5c14\u7c7b\u578b<\/h3>\n
\u76f4\u63a5\u7528true\u548cfalse\u505a\u6807\u8bb0\uff0c\u4e0d\u8981\u4f7f\u7528\u6570\u5b57\u6216\u8005\u5b57\u7b26\u4e32\u76841\u548c0\u6765\u505a\u6807\u8bb0\uff0c\u76f4\u63a5\u4e5f\u9ad8\u6548\u3002<\/p>\n
\u5176\u4ed6\u7684\u4f18\u5316\u65b9\u6cd5\u5df2\u7ecf\u6709\u5f88\u591a\u5206\u4eab\u4e86\uff0c\u5927\u5bb6\u53ef\u4ee5Google\u4e00\u4e0b<\/a>\uff0c\u53e6\u5916\u300ajavascript\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u300b\u4e00\u4e66\u4e2d\u4e5f\u5bf9JavaScript\u6027\u80fd\u4f18\u5316\u505a\u4e86\u8f83\u4e3a\u8be6\u7ec6\u7684\u9610\u8ff0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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