variable === undefined vs. typeof variable === “un
-
与风俱净
发布于
- 收藏
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: ThejQueryCoreStyleGuidelinessuggesttwodifferentwaystocheckwhetheravariableisdefined. GlobalVariables:typeofvariable===\undefined\ LocalVariable...
Detecting arrow key presses in JavaScript
-
与风俱净
发布于
- 收藏
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: HowdoIdetectwhenoneofthearrowkeysarepressed?Iusedthistofindout: functioncheckKey(e){ varevent=window.event?window.event:e; console.log(event.key...
How do I add indices to MySQL tables?
-
与风俱净
发布于
- 收藏
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: I\'vegotaverylargeMySQLtablewithabout150,000rowsofdata.Currently,whenItryandrun SELECT*FROMtableWHEREid=\'1\'; thecoderunsfineastheIDfieldisth...
Full path from file input using jQuery
-
与风俱净
发布于
- 收藏
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: WhenIcallval()onaninputwithtype=\file\Ionlygetfilenameratherthanfullpath.HowcanIgetfullpath? 回答1: Youcan\'t:It\'sasecurityfeatureinallmodernbrow...
Send File Attachment from Form Using phpMailer and
-
与风俱净
发布于
- 收藏
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):问题: Ihaveaformonexample.com/contact-us.phpthatlookslikethis(simplified): <formmethod=\post\action=\process.php\enctype=\multipart/form-data\> ...