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Finding duplicate values in MySQL
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Do a SELECT with a GROUP BY clause. Let's say name is the column you want to find duplicates in:
SELECT name, COUNT(*) c FROM table GROUP BY name HAVING c > 1;
This will return a result with the name value in the first column, and a count of ho...
Dealing with commas in a CSV file
...ggestions on how to handle a csv file that is being created, then uploaded by our customers, and that may have a comma in a value, like a company name.
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When using a Settings.settings file in .NET, where is the config actually stored?
...ings (i.e. settings.settings) use PerUserRoamingAndLocal for user settings by default (as I remembered).
Update: Strange but there are too many incorrect answers here. If you are looking for you user scoped settings file (user.config) it will be located in the following folder (for Windows XP):
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When to use in vs ref vs out
...efer to the 'comments (Community Additions)' section in the link mentioned by you. It is an error which is corrected in VS 2008 documentation.
– Bharat Ram V
Aug 12 '13 at 8:07
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C pointers : pointing to an array of fixed size
...time constant), the only proper way to pass such an array to a function is by using a pointer-to-array parameter
void foo(char (*p)[10]);
(in C++ language this is also done with references
void foo(char (&p)[10]);
).
This will enable language-level type checking, which will make sure that...
Why are const parameters not allowed in C#?
...also other C++ specific reasons, like passing const ref in order to pass by ref and be sure that state will not be changed. But why can't we mark as method parameters const in C#?
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The remote end hung up unexpectedly while git cloning
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Quick solution:
With this kind of error, I usually start by raising the postBuffer size by:
git config --global http.postBuffer 524288000
(some comments below report having to double the value):
git config --global http.postBuffer 1048576000
More information:
From the git co...
What is Ember RunLoop and how does it work?
...e run loop. This guarantees that whatever changes made to bound properties by the captured (mouse/keyboard/timer/etc) event are fully propagated throughout Ember's data-binding system before returning control back to the system. So, moving your mouse, pressing a key, clicking a button, etc., all lau...
Inversion of Control vs Dependency Injection
According to the paper written by Martin Fowler , inversion of control is the principle where the control flow of a program is inverted: instead of the programmer controlling the flow of a program, the external sources (framework, services, other components) take control of it. It's like we plug so...
Stack, Static, and Heap in C++
...you will always need and you know that you don't ever want to deallocate. (By the way, embedded environments may be thought of as having only static memory... the stack and heap are part of a known address space shared by a third memory type: the program code. Programs will often do dynamic allocati...