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What is the purpose of .PHONY in a Makefile?
...y're not associated with files, e.g.:
.PHONY: clean
clean:
rm -rf *.o
Now make clean will run as expected even if you do have a file named clean.
In terms of Make, a phony target is simply a target that is always out-of-date, so whenever you ask make <phony_target>, it will run, independ...
How to get the current time in Python
...
Use:
>>> import datetime
>>> datetime.datetime.now()
datetime.datetime(2009, 1, 6, 15, 8, 24, 78915)
>>> print(datetime.datetime.now())
2009-01-06 15:08:24.789150
And just the time:
>>> datetime.datetime.now().time()
datetime.time(15, 8, 24, 78915)
...
PHP calculate age
...:createFromFormat('d/m/Y', '12/02/1973', $tz)
->diff(new DateTime('now', $tz))
->y;
As of PHP 5.3.0 you can use the handy DateTime::createFromFormat to ensure that your date does not get mistaken for m/d/Y format and the DateInterval class (via DateTime::diff) to get the number of ...
Explain ExtJS 4 event handling
...k event handler.
Let's retrieve Element:
var el = Ext.get('test_node');
Now let's check docs for click event. It's handler may have three parameters:
click( Ext.EventObject e, HTMLElement t, Object eOpts )
Knowing all this stuff we can assign handler:
// event name event handler...
Datetime - Get next tuesday
...versatile, as you can specify the day of week, but it's your call :) (I've now edited mine to give a more generalized version.)
– Jon Skeet
Jun 14 '11 at 15:48
...
Memoization in Haskell?
...u can check the work so far by verifying that toList nats gives you [0..]
Now,
f_tree :: Tree Int
f_tree = fmap (f fastest_f) nats
fastest_f :: Int -> Int
fastest_f = index f_tree
works just like with list above, but instead of taking linear time to find each node, can chase it down in loga...
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...
how do i do an insert with DATETIME now inside of SQL server mgmt studio
...manual inserts but I wasn't sure how do pass in the equivalent of DateTime.Now in C#.
2 Answers
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What's a good rate limiting algorithm?
... = 8.0; // unit: seconds
allowance = rate; // unit: messages
last_check = now(); // floating-point, e.g. usec accuracy. Unit: seconds
when (message_received):
current = now();
time_passed = current - last_check;
last_check = current;
allowance += time_passed * (rate / per);
if (allowance...
What is memory fragmentation?
...---
| |
----------------------------------
Now, allocate some of it (5 allocations):
----------------------------------
|aaaabbccccccddeeee |
----------------------------------
Now, free the first four allocations but not the fifth:
---------------------...