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App Inventor 2开发简单计算器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
...度和高度属性皆设置为“充满”。如图2-2所示。各组件的命名及属性设置见表2-1。图2-2 计算器的用户界面设计表2-1 组件的命名及属性设置 第三节 代码编写——实现常规操作这个应用最麻烦的地方就是用户操作的不确定性，他...
Postfix发信的频率控制几个参数 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...址错误或不可到达的邮件，则默认情况下它会无限次数的重试，结果就导致磁盘被重试邮件日志占满，网络流量也会被浪费，更严重这会被认为是网络攻击而导致服务器或IP被封。因此需要通过一些参数配置解决，重试一定次数...
Why does isNaN(“ ”) (string with spaces) equal false?
...s a 0", why does parseInt("") return NaN?
– Jean-François Beauchamp
Apr 9 '15 at 15:29
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@Jean-F...
Error in plot.new() : figure margins too large in R
... This is really the best answer. Thanks.
– merve bıçakçı
Apr 5 '16 at 9:21
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JavaScript REST client Library [closed]
...nswered Mar 10 '15 at 14:38
François ZaninottoFrançois Zaninotto
4,2252727 silver badges4444 bronze badges
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Fastest way to flatten / un-flatten nested JSON objects
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3 ½ Years later...
For my own project I wanted to flatten JSON objects in mongoDB dot notation and came up with a simple solution:
/**
* Recursively flattens a JSON object using dot notation.
*
* NOTE: input must be an ob...
Hibernate error - QuerySyntaxException: users is not mapped [from users]
I'm trying to get a list of all the users from "users" table and I get the following error:
18 Answers
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How to disable Django's CSRF validation?
...nswered Dec 22 '17 at 13:07
François ConstantFrançois Constant
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Git On Custom SSH Port
My VPS provider recommends that I leave my SSH port to the custom port number they assign it by default (not 22). The thing is the while I know I can give the port number when create a remote config, it seems like I can't do the same when doing a git clone. I am using gitolite so I clone commands ...
CSS Child vs Descendant selectors
I am a bit confused between these 2 selectors.
8 Answers
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