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What's the best practice for primary keys in tables?
...rust the personnel officer. People leave, new ones come and have different ideas. Provide them with access to the identifier they think is unique/ they want to use, but internally for the db, dba should be making their own decision
– Dave Pile
Apr 17 '17 at 7:0...
What is the difference between List (of T) and Collection(of T)?
... looks for IList, IList<T>, List<T> etc. In short, you have no idea whether it will be called. Polymorphism fixes this.
– Marc Gravell♦
Mar 11 '11 at 18:29
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How do I provide a username and password when running “git clone git@remote.git”?
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never a good idea to type your password in command line. Did you know your system may store command line history in a file? (Ex: Linux has an hidden file named .bash_history)
– augusto
Feb 6 '19 at 2...
How to send POST request?
...wer say "If you really want to handle with HTTP using Python"? is it a bad idea to handle HTTP requests? if so, why? can anyone explain please?
– Jan Pisl
Oct 29 '19 at 17:02
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What does a tilde do when it precedes an expression?
...edit — actually it's the second ~ that is applied first, but you get the idea.)
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Creating a config file in PHP
...ass? I read in security article that creating global variables isnt a good idea so what do you suggest?
– Kevlwig
Feb 11 '18 at 1:14
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Is the list of Python reserved words and builtins available in a library?
...essly unavailable in safe scenarios. Sure, assigning set = 1 is a terrible idea, but a class with a method or attribute named set (so it's always referenced with instance.set, not as plain set) isn't necessarily awful. There are perfectly legitimate cases for naming a method set; if set was a keywor...
Hibernate Annotations - Which is better, field or property access?
...really address your questions, as that is what encapsulation is all about. Ideally all of your fields should be private, and if possible they should have no getters or setters - that is the best level of encapsulation you can hope for. Consider a password checker. 2 private fields passwordHash an...
How do I generate a constructor from class fields using Visual Studio (and/or ReSharper)?
... accustomed to many of the Java IDEs ( Eclipse , NetBeans , and IntelliJ IDEA ) providing you with a command to generate a default constructor for a class based on the fields in the class.
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Shell脚本编程30分钟入门 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...荐给所有变量加上花括号，这是个好的编程习惯。IntelliJ IDEA编写shell script时，IDE就会提示加花括号。
重定义变量
已定义的变量，可以被重新定义，如：
your_name="qinjx"
echo $your_name
your_name="alibaba"
echo $your_name
这样写是合...