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Decimal number regular expression, where digit after decimal is optional
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Use the following:
/^\d*\.?\d*$/
^ - Beginning of the line;
\d* - 0 or more digits;
\.? - An optional dot (escaped, because in regex, . is a special character);
\d* - 0 or more digits (the decimal part);
$ - End of the line.
This allows for .5 decimal rather than requiring the leading zero,...
Why Qt is misusing model/view terminology?
...opinion however, the problem is not Qt's alone, but is shared by all frameworks that allow us to adhere to the principle of separation of concerns when implementing our UIs. When someone comes up with such a framework, and finds a good way to keep "things" separated, they always feel obliged to have...
Which are more performant, CTE or temporary tables?
Which are more performant, CTE or Temporary Tables ?
12 Answers
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Would you, at present date, use JBoss or Glassfish (or another) as Java EE server for a new project?
...ask myself a few questions first. One thing that I would not question anymore is that I would flat refuse to use JSPs unless I was tortured until I cried for my mommy.
Do I have to be compatible/deploy to a specific product because of someone's mandate? Is there no way to ignore them or convince ...
How do I resolve git saying “Commit your changes or stash them before you can merge”?
I made some updates on my local machine, pushed them to a remote repository, and now I'm trying to pull the changes to the server and I get the message;
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Does using “new” on a struct allocate it on the heap or stack?
When you create an instance of a class with the new operator, memory gets allocated on the heap. When you create an instance of a struct with the new operator where does the memory get allocated, on the heap or on the stack ?
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Best practices for exception management in Java or C# [closed]
...It seems odd to me that you want to catch exceptions and turn them into error codes. Why do you think the caller would prefer error codes over exceptions when the latter is the default in both Java and C#?
As for your questions:
You should only catch exceptions that you can actually handle. Just...
How do I convert a pandas Series or index to a Numpy array? [duplicate]
Do you know how to get the index or column of a DataFrame as a NumPy array or python list?
8 Answers
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Should I return EXIT_SUCCESS or 0 from main()?
...g conflicting answers: should the main routine of a C++ program return 0 or EXIT_SUCCESS ?
8 Answers
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Non-static variable cannot be referenced from a static context
...et, you know immediately that it's a car even if you can't see which model or type. This is because you compare what you see with the class "car". The class contains which is similar to all cars. Think of it as a template or an idea.
At the same time, the car you see is an instance of the class "ca...