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LINGO使用指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...题，利用LINGO高效的求解器可快速求解并分析结果。
§1 LINGO快速入门
当你在windows下开始运行LINGO系统时，会得到类似下面的一个窗口：
外层是主框架窗口，包含了所有菜单命令和工具条，其它所有的窗口将被包含在主窗...
How to get full path of a file?
Is there an easy way I can print the full path of file.txt ?
32 Answers
32
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What is the difference between ${var}, “$var”, and “${var}” in the Bash shell?
What the title says: what does it mean to encapsulate a variable in {} , "" , or "{} "? I haven't been able to find any explanations online about this - I haven't been able to refer to them except for using the symbols, which doesn't yield anything.
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In PyCharm, how to go back to last location?
edit: my system had global key map which had overridden pycharm.
Here's the original question:
11 Answers
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How to create custom exceptions in Java? [closed]
How do we create custom exceptions in Java?
3 Answers
3
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django templates: include and extends
I would like to provide the same content inside 2 different base files.
7 Answers
7
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Defining custom attrs
I need to implement my own attributes like in com.android.R.attr
5 Answers
5
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How do you run a crontab in Cygwin on Windows?
Some cygwin commands are .exe files, so you can run them with the standard Windows Scheduler, but others don't have an .exe extension so can't be run from DOS (it seems like).
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install / uninstall APKs programmatically (PackageManager vs Intents)
My application installs other applications, and it needs to keep track of what applications it has installed. Of course, this could be achieved by simply keeping a list of installed applications. But this should not be necessary! It should be the responsibility of the PackageManager to maintain the ...
Unable to Cast from Parent Class to Child Class
I am trying to cast from a parent class to a child class but I get an InvalidCastException. The child class only has one property of type int. Does anyone know what I need to do?
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