JavaScriptÖеÄJSON
JavaScriptÖеÄJSON
JavaScriptÊÇΪÍø¾°ä¯ÀÀÆ÷×öÒ³Ãæ½Å±¾ÓïÑÔ¶øʵÏÖµÄÒ»ÖÖ±à³ÌÓïÑÔ¡£ËüÏÖÔÚ»¹±»ºÜ¶àÈËÎó½âÊÇjavaµÄ×Ó¼¯¡£ËüÊÇÒ»ÖÖ¾ßÓÐÀàCÓï·¨ºÍÈõ¶ÔÏóµÄģʽÓïÑÔ¡£JavaScriptÍêÈ«×ñÊØECMAScriptÓïÑÔ˵Ã÷ÊéµÚÈý°æ¡£
JSONÊÇJavaScript¶ÔÏóÎÄ×ּǺŵÄ×Ó¼¯¡£ÓÉÓÚJSONÊÇJavaSriptµÄ×Ó¼¯£¬ËùÒÔÔÚJavaScriptÀ¿ÉÒÔ·½±ãµÄÓ¦¸ÃJSON¡£
var myJSONObject = {"bindings": [
{"ircEvent": "PRIVMSG", "method": "newURI", "regex": "^http://.*"},
{"ircEvent": "PRIVMSG", "method": "deleteURI", "regex": "^delete.*"},
{"ircEvent": "PRIVMSG", "method": "randomURI", "regex": "^random.*"}
]
};
ÔÚÕâ¸öÀý×ÓÀïÃ棬´´½¨Ò»¸öµ¥¶ÀµÄ³ÉÔ±——“bindings”£¬Õâ¸ö³ÉÔ±Àï°üº¬Ò»¸öÓÐÈý¸ö¶ÔÏó——“ircEvent”, “method”ºÍ“regex”µÄ¶ÔÏóÊý×é¡£
Êý¾Ý¿ÉÒÔÓöººÅ£¨£¬£©»òÕßϱê·û£¬Àý£º
myJSONObject.bindings[0].method // "newURI"
Äú¿ÉÐÄÓÃeval()°ÑJSONÖеÄÊý¾Ýת»¯Îª¶ÔÏó¡£ Eval()¿ÉÒÔµ÷ÓÃjavascript±àÒëÆ÷¡£ÓÉÓÚJSONÊÇJavaScriptµÄ×Ó¼¯£¬±àÒëÆ÷¿ÉÒÔÕýÈ·µÄ°ÑÎı¾×ª»¯Îª¶ÔÏó½á¹¹¡£Õâ¸ö×ֶαØÐëÊÇ°üÔÚ¸¸µÄÓï·¨Öеģ¬±ÜÃâÔÚJavaScriptµÄÓ﷨ϲúÉú¶þÒâÐÔ¡£
var myObject = eval('(' + myJSONtext + ')');
Õâ¾ßevalº¯ÊýÔËÐзdz£¿ì£¬µ«ËüÄܱàÒëºÍÔËÐÐÈκÎJavaScript³ÌÐò£¬Òò´ËÓÐÒ»¶¨µÄ°²È«Òþ»¼¡£µ±Ô´´úÂëÊÇ¿ÉÐÅÈβ¢ÇÒºÏÊʵÄʱºò£¬evalµÄÓ÷¨ÊÇÍêÈ«¿ÉÒԵġ£EÓÃJSONÆÊÎöÆ÷¸ü¼Ó°²È«¡£ÔÚXMLHttpRequestµÄÍøÒ³Ó¦ÓóÌÐòÖУ¬Ö»ÓÐÏàͬµÄÔ´³ÌÐòÌṩҳÃæ±»ÔÊÐí£¬Òò´ËËüÊÇ¿ÉÐŵġ£µ«ËüÒ²Óв»¿ÉÒÔµÄʱºò£ºÈç¹û·þÎñÆ÷ÔÚJSON±àÂëÉϲ»ÑÏÃÜ»òÕßËüûÓÐÈ«²¿Ö¤ÊµËüµÄËùÓÐÊäÈëµÄ»°£¬Ëü¿ÉÄÜ·¢ËÍ´øÓÐΣÏսű¾µÄ²»ºÏ·¨JSONÎı¾¡£¶øevalº¯ÊýÄÜÔËÐÐÕâ¸ö½Å±¾£¬ÊͷųöΣÏÕ¡£
ÓÃJSON½âÎöÆ÷¾ÍÄÜ·ÀÖ¹ÕâÖÖÊÂÇ飬JSON½âÎöÆ÷Ö»ÈÏJSONÄÚÈÝ£¬²»ÈÏ×÷±£½Å±¾¡£ÔÚÖ§³ÖJSONµÄä¯ÀÀÆ÷ÖУ¬JSON½âÎöÆ÷±Èeval¿ì¶àÁË£¬ÆÚÍûÔÚECMAScript±ê×¼µÄÏÂÒ»¸ö°æ±¾Öлá°üº¬¶Ô±¾µØJSONµÄÖ§³Ö¡£
var myObject = JSON.parse(myJSONtex
Ïà¹ØÎĵµ£º
/**
* JavaScript ÊÇÃæÏò¶ÔÏóµÄÓïÑÔ£¬µ«ÊÇËûµÄÃæÏò¶ÔÏó²»ÊÇ»ùÓÚÀàµÄ£¬ÊÇ»ùÓÚÔÐ͵Ä;
* µ«ÊÇËûµÄһЩÌØÐÔ(º¯ÊýÊÇÊý¾Ý)£¬Ê¹µÃËü¿ÉÒÔÄ£Äâ»ùÓÚÀàµÄÃæÏò¶ÔÏ󣬵«ÊÇ JavaScript ²¢²»Ö§³ÖºÍ Java Ò»ÑùµÄÀ࣬
* Òò´Ë JavaScript ÖеÄ"Àà"¿ÉÒÔ³Æ×÷"αÀà"
*/
//
/**
* ¹¹Ô캯Êý: js ÖÐÓÃÀ´ºÍ new ÔËËã·ûÒ»ÆðʹÓõĺ¯Êý³Æ× ......
ÔÚJSÖУ¬´´½¨¶ÔÏó£¨Create Object£©²¢²»ÍêÈ«ÊÇÎÒÃÇʱ³£ËµµÄ´´½¨Àà¶ÔÏó£¬JSÖеĶÔÏóÇ¿µ÷µÄÊÇÒ»ÖÖ¸´ºÏÀàÐÍ£¬JSÖд´½¨¶ÔÏó¼°¶Ô¶ÔÏóµÄ·ÃÎÊÊǼ«ÆäÁé»îµÄ¡£
JS¶ÔÏóÊÇÒ»ÖÖ¸´ºÏÀàÐÍ£¬ËüÔÊÐíÄãͨ¹ý±äÁ¿Ãû´æ´¢ºÍ·ÃÎÊ£¬»»Ò»ÖÖ˼·£¬¶ÔÏóÊÇÒ»¸öÎÞÐòµÄÊôÐÔ¼¯ºÏ£¬¼¯ºÏÖеÄÿһÏÓÉÃû³ÆºÍÖµ×é³É£¨ÌýÆðÀ´ÊDz»ÊǺÜÏñÎÒÃdz£Ìý˵µÄHASH±í¡¢× ......
calcu() ----º¯ÊýʵÏÖÁ½¸öÊýÏà³Ë
document.write(); ---´òÓ¡
document.calc.ÔªËØÃû.value; --»ñµÃ±íµ¥µÄÖµ
document.±íµ¥Ãû¡£±íµ¥ÔªËØÃû¡£value Ϊ±íµ¥¸³Öµ
¶¨Ò庯Êý£º
function Ãû×Ö()
{
//javaScriptÔ¤Óï¾ä
}
onClick="º¯ÊýÃû";  ......
µÚ¶þÕ Data Access Êý¾Ý·ÃÎÊ
One of the classic computer science problems is determining where data should be stored for optimal reading and writing. Where data is stored is related to how quickly it can be retrieved during code execution. This problem in JavaScri ......
¼ÙÈçä¯ÀÀÆ÷À뿪ÁËJavaScript
¼ÙÈçä¯ÀÀÆ÷À뿪ÁË JavaScript£¬ÄÇô»¥ÁªÍøÉϾø´ó¶àÊýÍøÒ³¾ÍÎÞ·¨Õ¹Ê¾¡£µ«ÊǼ¤½øµÄÖ÷ÕŲ¢·ÇÒ»ÎÞÊÇ´¦£¬ÖÁÉÙËüÄÜ·ñ´Ù½øÎÒÃǶÔÊìÊÓÎ޶õÄÊÂÎ»»Ò»¸ö½Ç¶È×ö½øÒ»²½Ë¼¿¼¡£¼ÙÈçÓÃJavaÌæ»»JavaScript£¬»áÓÐʲôºÃ´¦£¿ºÃ´¦»òÐíÓÐÈý¸ö²ãÃ棬¶ÔÓÚÊÖ»úÓ¦ÓöøÑÔ£¬ÕâЩÓŵãÓÈÆä¿É¹ó¡£
1. Ô¤ÏȱàÒ룬ʼþÏì ......