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How do I determine the size of my array in C?
...;
size_t n = sizeof(a) / sizeof(a[0]);
Another advantage is that you can now easily parameterize
the array name in a macro and get:
#define NELEMS(x) (sizeof(x) / sizeof((x)[0]))
int a[17];
size_t n = NELEMS(a);
share
...
How to update Python?
...
UPDATE: 2018-07-06
This post is now nearly 5 years old! Python-2.7 will stop receiving official updates from python.org in 2020. Also, Python-3.7 has been released. Check out Python-Future on how to make your Python-2 code compatible with Python-3. For upda...
Pushing an existing Git repository to SVN
...ository, using dcommit. That's all.
Keeping repositories in sync
You can now synchronise from SVN to Git, using the following commands:
git svn fetch
git rebase trunk
And to synchronise from Git to SVN, use:
git svn dcommit
Final note
You might want to try this out on a local copy, before a...
Python group by
...AT'), ('5594916', 'ETH'), ('1550003', 'ETH')]
input.sort(key=sortkeyfn)
Now input looks like:
[('5238761', 'ETH'), ('5349618', 'ETH'), ('962142', 'ETH'), ('7795297', 'ETH'),
('7341464', 'ETH'), ('5594916', 'ETH'), ('1550003', 'ETH'), ('11013331', 'KAT'),
('9843236', 'KAT'), ('9085267', 'NOT'),...
How can I easily fixup a past commit?
... --interactive --autosquash. So the simplest way to fixup a past commit is now:
$ git add ... # Stage a fix
$ git commit --fixup=a0b1c2d3 # Perform the commit to fix broken a0b1c2d3
$ git rebase -i --autosquash a0b1c2d3~1 # Now merge fixup commit into broken comm...
Scala equivalent of Java java.lang.Class Object
...ding the return type of getClass.
(James Moore reports that the ticket is "now", ie Nov. 2011, two years later, fixed.
In 2.9.1, getClass now does:
scala> "foo".getClass
res0: java.lang.Class[_ <: java.lang.String] = class java.lang.String
)
Back in 2009:
It would be useful if Scala ...
What is a patch in git version control?
...TS)
See also Contributing to Rails with Git as another concrete example.
Nowadays, the GitHub pull request makes it really easy to apply patches on GitHub repos, which is useful when you aren't a direct contributor (ie you have no right to directly push to a repo).
Actually, fairly recently GitHub...
Converting timestamp to time ago in PHP e.g 1 day ago, 2 days ago…
...
Function :
function time_elapsed_string($datetime, $full = false) {
$now = new DateTime;
$ago = new DateTime($datetime);
$diff = $now->diff($ago);
$diff->w = floor($diff->d / 7);
$diff->d -= $diff->w * 7;
$string = array(
'y' => 'year',
'...
Why did Rails4 drop support for “assets” group in the Gemfile
...ion) like coffee-rails if you are using coffee templates
and the fact that now assets are not precompiled on demand in production anymore.
(not precompiled on demand in production) Means that if you have that gems in production environment in 3.2.x and forget to precompile, Rails will do exactly wha...
What is the difference between gsub and sub methods for Ruby Strings
...
Yeah. I understand now. In my defense, I don't think this was very obvious... Until now, that is.
– Ryanmt
Jul 20 '11 at 22:50
...