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Why .NET String is immutable? [duplicate]
...nute's extra start-up to save a massive amount of memory was a performance win in the case in question). With mutable objects that can't be done.
No side-effects can come from passing an immutable type as a method to a parameter unless it is out or ref (since that changes the reference, not the obje...
Calling C++ class methods via a function pointer
...myfunction (arg);.
This kind of thing is fairly common when using the old Win32 APIs, which were originally designed for C rather than C++. Of course in that case, the parameter is normally LPARAM or similar rather than a pointer, and some casting is needed.
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What are the downsides to using Dependency Injection? [closed]
...oing to increase complexity. It's all about balance, which begins with knowing the upsides and downsides. When people say, 'there are no downsides,' it's a sure indicator that they haven't fully understood the thing yet.
– Don Branson
Mar 9 '10 at 18:37
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NSObject +load and +initialize - What do they do?
...ories define the same method on the same class, one of the methods will “win” and be used, and the other method will never be called.
The initialize Method
The runtime calls the initialize method on a class object just before sending the first message (other than load or initialize) to the cla...
How to start two threads at “exactly” the same time
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@Santa - The Win32 API for example offers different primitives. One useful type is the manual reset event returned when you call CreateEvent. msdn.microsoft.com/en-us/library/ms686364%28VS.85%29.aspx
– ChaosPandion
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Is there a way to get rid of accents and convert a whole string to regular letters?
...ut if you need to do this with a lot of text, pre-compiling the regex is a win.
– David Conrad
Mar 3 '13 at 21:49
3
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How to echo with different colors in the Windows command line
...know that the color bf command sets the colors of the whole command line window but I wanted to to print one single line in a different color.
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What's the best way to check if a String represents an integer in Java?
I normally use the following idiom to check if a String can be converted to an integer.
38 Answers
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Retrieving the last record in each group - MySQL
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MySQL 8.0 now supports windowing functions, like almost all popular SQL implementations. With this standard syntax, we can write greatest-n-per-group queries:
WITH ranked_messages AS (
SELECT m.*, ROW_NUMBER() OVER (PARTITION BY name ORDER BY id...
How do I set a cookie on HttpClient's HttpRequestMessage
...oded");
httpRequestMessage.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36");
httpRequestMessage.Headers.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,imag...