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Most efficient way to remove special characters from string
...Regular expression: 294.4 ms.
Edit 2:
I added the distinction between A-Z and a-z in the code above. (I reran the performance test, and there is no noticable difference.)
Edit 3:
I tested the lookup+char[] solution, and it runs in about 13 ms.
The price to pay is, of course, the initialization of...
Does R have an assert statement as in python?
a statement that checks if something is true and if not prints a given error message and exits
3 Answers
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How to make div background color transparent in CSS
...that allows you to do that.
Just create a new image, delete the background and put a semi-transparent color in it, then save it in png.)
As said by René, the best thing to do would be to mix both, with the rgba first and the 1px by 1px image as a fallback if the browser doesn't support alpha :
ba...
How to convert a string with comma-delimited items to a list in Python?
... This is not an array, it is a list, Arrays represent basic values and behave very much like lists, except the type of objects stored in them is constrained.
– joaquin
Mar 22 '11 at 6:32
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How to avoid annoying error “declared and not used”
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That error is here to force you to write better code, and be sure to use everything you declare or import. It makes it easier to read code written by other people (you are always sure that all declared variables will be used), and avoid some possible dead code.
But, if you real...
Get original URL referer with PHP?
...t the referer Url. It works as expected until the user clicks another page and the referer changes to the last page.
5 Answ...
TypeScript type signatures for functions with variable argument counts
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@AlexanderMills func is the name of the function.
– Bob Vale
Jul 30 '17 at 21:49
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differences between 2 JUnit Assert classes
...t framework contains 2 Assert classes (in different packages, obviously) and the methods on each appear to be very similar. Can anybody explain why this is?
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What does the constant 0.0039215689 represent?
...was the multiply-by-reciprocal optimization. So I checked in my calculator and sure enough - I guessed right.
– Mysticial
Mar 24 '14 at 22:08
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What does && mean in void *p = &&abc;
... defined in the current function.
void *p = &&abc is illegal in standard C99 and C++.
This compiles with g++.
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