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Check if database exists in PostgreSQL using shell
...-f1 | grep -qxF "$DB_NAME"
The -t and -A options make sure the output is raw and not "tabular" or whitespace-padded output. Columns are separated by the pipe character |, so either the cut or the grep has to recognize this. The first column contains the database name.
EDIT: grep with -x to preven...
How to tell a Mockito mock object to return something different the next time it is called?
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EProgrammerNotFound exception in Delphi?
In Delphi 2009, SysUtils.pas contains this in line 425:
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How to hide elements without having them take space on the page?
I'm using visibility:hidden to hide certain elements, but they still take up space on the page while hidden.
12 Answers
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Turn off auto formatting in Visual Studio
I'm a code purist, preferring my own style of code formatting as opposed to Visual Studio's default settings. I've turned off auto-formatting options in Tools/options. In most cases it works.
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Static method in a generic class?
...erics anyway, you might as well use them all the way --- namely not to use raw types like Comparable. Try <T extends Comparable<? super T>> instead.
– easoncxz
Jul 10 '15 at 13:05
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How to reposition Chrome Developer Tools
The tools are opened on the bottom of the chrome window per default. This is a rather bad choice for a wide screen display since there is plenty of empty space to the right but not much vertical space to spare. Unfortunately, I have found no way to reposition the tools. I would like to have them on ...
Start thread with member function
...of class (it's not visible for programmer), so when passing this method as raw function you will always encounter a problem during compilation and declaration mismatch.
– zoska
Oct 10 '13 at 11:56
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Perform commands over ssh with Python
...s used by passing in shell_type=spur.ssh.ShellTypes.minimal, then only the raw command is sent. Implementing background tasks directly feels a bit out of scope for Spur, but you should be able to run the command you've described by invoking a shell e.g. shell.run(["sh", "-c", "nohup ./bin/rpmbuildpa...
MQTT物联网协议完全实践指南 · App Inventor 2 中文网
...入门教程》
下载资源
MQTT扩展下载：
de.ullisroboterseite.ursai2pahomqtt.aix
完整示例项目：
mqtt_demo.aia
MQTT协议深度解析
1. 协议架构与通信模式
MQTT采用客户端-服务器架构，基于...