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What does void* mean and how to use it?
...d *func(void* i); , what does this void* mean here for the function name and for the variable type, respectively?
10 Ans...
Remove .php extension with .htaccess
Yes, I've read the Apache manual and searched here. For some reason I simply cannot get this to work. The closest I've come is having it remove the extension, but it points back to the root directory. I want this to just work in the directory that contains the .htaccess file.
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++someVariable vs. someVariable++ in JavaScript
... the value of the expression is the original value"
Now when used as a standalone statement, they mean the same thing:
x++;
++x;
The difference comes when you use the value of the expression elsewhere. For example:
x = 0;
y = array[x++]; // This will get array[0]
x = 0;
y = array[++x]; // Thi...
How do I append one string to another in Python?
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If you only have one reference to a string and you concatenate another string to the end, CPython now special cases this and tries to extend the string in place.
The end result is that the operation is amortized O(n).
e.g.
s = ""
for i in range(n):
s+=str(i)
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Lambda function in list comprehensions
...output of the following two list comprehensions different, even though f and the lambda function are the same?
6 Answer...
HttpSecurity, WebSecurity and AuthenticationManagerBuilder
...plain when to override configure(HttpSecurity) , configure(WebSecurity) and configure(AuthenticationManagerBuilder) ?
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Postgres: INSERT if does not exist already
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Postgres 9.5 (released since 2016-01-07) offers an "upsert" command, also known as an ON CONFLICT clause to INSERT:
INSERT ... ON CONFLICT DO NOTHING/UPDATE
It solves many of the subtle problems you can run into when using concurrent operation, which some other answers propose.
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How can I get a view's current width and height when using autolayout constraints?
...tion, or in response to an event). Is there a way to get its current width and height?
5 Answers
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DLL and LIB files - what and why?
I know very little about DLL's and LIB's other than that they contain vital code required for a program to run properly - libraries. But why do compilers generate them at all? Wouldn't it be easier to just include all the code in a single executable? And what's the difference between DLL's and LIB's...
jquery.validate.unobtrusive not working with dynamic injected elements
... with the latest MVC RC? or they just fixed that?
– xandy
Jan 24 '11 at 10:03
1
When using the co...