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Match two strings in one line with grep
... tried the following but this matches lines that contain either string1 or string2 which not what I want.
21 Answers
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Undefined behavior and sequence points
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C++98 and C++03
This answer is for the older versions of the C++ standard. The C++11 and C++14 versions of the standard do not formally contain 'sequence points'; operations are 'sequenced before' or 'unsequenced' or 'indeterminately sequenced' instead. T...
Why do I get AttributeError: 'NoneType' object has no attribute 'something'?
I keep getting an error that says
10 Answers
10
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What do we mean by Byte array? [closed]
...ay is an array of bytes (tautology FTW!).
You could use a byte array to store a collection of binary data, for example, the contents of a file. The downside to this is that the entire file contents must be loaded into memory.
For large amounts of binary data, it would be better to use a streaming ...
How to verify an XPath expression in Chrome Developers tool or Firefox's Firebug?
...s can be achieved by three different approaches (see my blog article here for more details):
Search in Elements panel like below
Execute $x() and $$() in Console panel, as shown in Lawrence's answer
Third party extensions (not really necessary in most of the cases, could be an overkill)
Here is ...
Check if a path represents a file or a folder
I need a valid method to check if a String represents a path for file or a directory. What are valid directory names in Android? As it comes out, folder names can contain '.' chars, so how does system understand whether there's a file or a folder?
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In C#, should I use string.Empty or String.Empty or “” to intitialize a string?
...rue - due to string interning, it will be created either once per assembly or once per AppDomain (or possibly once for the whole process - not sure on that front). This difference is negligible - massively, massively insignificant.
Which you find more readable is a different matter, however. It's s...
Can I use a binary literal in C or C++?
I need to work with a binary number.
19 Answers
19
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Why does string::compare return an int?
...y does string::compare return an int instead of a smaller type like short or char ? My understanding is that this method only returns -1, 0 or 1.
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Should services always return DTOs, or can they also return domain models?
...ervice layer)
Makes you feel like you are pulling the guts out right? According to Martin Fowler: the Service Layer defines the application's boundery, it encapsulates the domain. In other words it protects the domain.
Sometimes service needs to return data object that wasn't defined in the do...