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How to remove line breaks (no characters!) from the string?
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You can also use PHP trim
This function returns a string with whitespace stripped from the beginning and end of str. Without the second parameter, trim() will strip these characters:
" " (ASCII 32 (0x20)), an ordinary space.
"\t...
How to assign colors to categorical variables in ggplot2 that have stable mapping?
...maintain consistent color schemes across multiple data frames that are not all obtained by subsetting a single large data frame. Managing the factors levels in multiple data frames can become tedious if they are being pulled from separate files and not all factor levels appear in each file.
One way...
Is there a difference between foo(void) and foo() in C++ or C?
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Can you give me an example of C C90 and later where using void foo() instead of void foo(void) will produce a functional difference? I.e. I have been using the version without the void for many years and havent seen any problem, am I missing some...
Why do people use __(double underscore) so much in C++
...specific, and are slightly more detailed than some others have suggested.
All identifiers that contain a double underscore or start with an underscore followed by an uppercase letter are reserved for the use of the implementation at all scopes, i.e. they might be used for macros.
In addition, all ...
How do I add a path to PYTHONPATH in virtualenv
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You can usually avoid having to do anything with PYTHONPATH by using .pth files. Just put a file with a .pth extension (any basename works) in your virtualenv's site-packages folder, e.g. lib\python2.7\site-packages, with the absolute p...
JavaScript global event mechanism
...ndow.onerror = function(msg, url, line, col, error) {
// Note that col & error are new to the HTML 5 spec and may not be
// supported in every browser. It worked for me in Chrome.
var extra = !col ? '' : '\ncolumn: ' + col;
extra += !error ? '' : '\nerror: ' + error;
// You can...
Get a CSS value with JavaScript
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If you want to change background color of a div for example, be careful to NOT USE "backgroundColor" instead of "backgroung-color" ;)
– baptx
May 20 '12 at 17:24
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What does {0} mean when initializing an object?
...ch member not
explicitly initialized shall be
default-initialized.
Example:
struct S { int a; char* b; int c; };
S ss = { 1, "asdf" };
initializes ss.a with 1, ss.b with
"asdf", and ss.c with the value of an
expression of the form int(), that is,
0.
You can find the complete spe...
RESTful web service - how to authenticate requests from other services?
...This token will live in specific time (lets say in one day).
Here is an example from to generate authentication token:
(day * 10) + (month * 100) + (year (last 2 digits) * 1000)
for example:
3 June 2011
(3 * 10) + (6 * 100) + (11 * 1000) =
30 + 600 + 11000 = 11630
then concatenate with user...
How do I use a Boolean in Python?
...define "checker" before testing it. While OP defines it earlier, in your example checker = None is absolutely necessary or you will get a UnboundLocalError
– dprogramz
Jan 13 '14 at 18:04
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