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Why is string concatenation faster than array join?
Today, I read this thread about the speed of string concatenation.
9 Answers
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Why shouldn't I use PyPy over CPython if PyPy is 6.3 times faster?
I've been hearing a lot about the PyPy project. They claim it is 6.3 times faster than the CPython interpreter on their site .
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In STL maps, is it better to use map::insert than []?
A while ago, I had a discussion with a colleague about how to insert values in STL maps . I preferred map[key] = value; because it feels natural and is clear to read whereas he preferred map.insert(std::make_pair(key, value)) .
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How to debug a single thread in Visual Studio?
...g in the breakpoints window has no "filter" command... and how do you find out the current thread Id anyway? -- Are you going to the immediate window and typing System.Threading.Thread.CurrentThread.ManagedThreadId or something?
– BrainSlugs83
Dec 10 '15 at 1:0...
What must I know to use GNU Screen properly? [closed]
... and they're having a hard time getting used to it. That makes me think about the essential things he needs to know about the excellent Screen utility, the same things that you'd think worthwhile to teach someone, a beginner, from the ground up. What are some analogies and handy tips for remember...
How can I use a DLL file from Python?
...s). Each tuple in hllApiParams has a parameter "direction" (1 = input, 2 = output and so on), a parameter name and a default value - see the ctypes doco for details
Once you have the prototype and parameter information, you can create a Python "callable" hllApi with which to call the function. You ...
Object reference not set to an instance of an object.Why doesn't .NET show which object is `null`?
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(For information about the new exception helper in Visual Studio 2017 see the end of this answer)
Consider this code:
String s = null;
Console.WriteLine(s.Length);
This will throw a NullReferenceException in the second line and you want t...
How to quit android application programmatically
...ent type it understands) and the user has used the up navigation to switch out of the current task and into its own task. In this case, if the user has navigated down into any other activities of the second application, all of those should be removed from the original task as part of the task switch...
Refactoring in Vim
... are some hacks that can perform really well, probably better than any IDE out there, but for an out-of-the-box solution I'd say an actual IDE would perform better for most users. I'd be thinking on a 80-20% kind of situation (even more, with the balance in favor of the IDE).
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What is the difference between inversedBy and mappedBy?
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Oddly the Doctrine documenter decided to leave out the yaml example of a many-to-one bidirectional mapping, probably the most commonly used!
– Peter Wooster
Jan 21 '13 at 21:46
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