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Strangest language feature

... Fun with auto boxing and the integer cache in Java: Integer foo = 1000; Integer bar = 1000; foo <= bar; // true foo >= bar; // true foo == bar; // false //However, if the values of foo and bar are between 127 and -12...
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How can I remove a character from a string using Javascript?

...g = mystring.replace(/\/r/g, '/'); EDIT: Since everyone's having so much fun here and user1293504 doesn't seem to be coming back any time soon to answer clarifying questions, here's a method to remove the Nth character from a string: String.prototype.removeCharAt = function (i) { var tmp = th...
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Reorder levels of a factor without changing order of values

... some more, just for the record ## reorder is a base function df$letters <- reorder(df$letters, new.order=letters[4:1]) library(gdata) df$letters <- reorder.factor(df$letters, letters[4:1]) You may also find useful Relevel and combine_factor. ...
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Which equals operator (== vs ===) should be used in JavaScript comparisons?

... var1 == var2 When using == for JavaScript equality testing, some funky conversions take place. Moral of the story: Use === unless you fully understand the conversions that take place with ==. share ...
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xunsearch主键重复、搜索结果重复 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...升级最新版本。 如何确认已升级成功,请参考:https://fun123.cn/?q=%E5%A6%82%E4%BD%95%E6%9F%A5%E7%9C%8B+xunsearch+%E7%89%88%E6%9C%AC&x=0&y=0xunsearch 主键重复
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安裝 APP Inventor 模拟器 aiStarter - App Inventor 2 中文网 - 清泛IT论坛,有思想、有深度

...内置AI伴侣已升级最新。 免费高速下载地址:https://www.fun123.cn/reference/creative/ai2_starter.html
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App Inventor 2 连接调试器的几种方式的比较 - App Inventor 2 中文网 - 清...

...2Starter模拟器。 Q:商业模拟器如何使用? https://bbs.tsingfun.com/thread-1741-1-1.html Q:模拟器有什么不足吗?A:使用模拟器无法完成与真实手机相同的所有操作,例如,无法摇动它、无法拨打或接听电话等。 ---------------------视频...
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使用照相机时老是弹出 error 201 : the camera d id not return an image ...

...版本过旧,不包含官方bug修复,请使用我们最新的平台 fun123.cn 试试。 引用: 参考资料: https://community.appinventor.mi ... android-8-0/6024/14 https://github.com/mit-cml/appinventor-sources/issues/2140
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App Inventor 2 连接打印机(Printer),自定义打印的实现 - App Inventor ...

...程(难度系数:★★) 教程入口:App Inventor 2 中文网(fun123.cn) -> 登陆 -> “项目指南” -> 连接打印机"开始学习"。 App功能描述 实现App Inventor 2连接打印机并打印我们设定内容的功能。 通过研究,除非打印机驱动层面...
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App Inventor 2 手机蓝牙及语音控制 - App Inventor 2 中文网 - 清泛IT论坛,有思想、有深度

...音控制软件。 蓝牙硬件通用教程请看这里: https://www.fun123.cn/reference/iot/ble.html