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What are the most-used vim commands/keypresses?
...obal
:%s/foo/bar/g substitute all occurrences of "foo" to "bar"
% is a range that indicates every line in the file
/g is a flag that changes all occurrences on a line instead of just the first one
Searching
/ search forward; ? search backward
* search forward for word under cursor; # search...
How to save a BufferedImage as a File
... term plug-in is used since Image I/O is extensible and can support a wide range of formats.
But the following standard image format plugins : JPEG, PNG, GIF, BMP and WBMP are always be present.
For most applications it is sufficient to use one of these standard plugins. They have the advantage of b...
Is there any way to kill a Thread?
...id))
def main():
stop_threads = False
workers = []
for id in range(0,3):
tmp = threading.Thread(target=do_work, args=(id, lambda: stop_threads))
workers.append(tmp)
tmp.start()
time.sleep(3)
print('main: done sleeping; time to stop the threads.')
sto...
Difference between Select and ConvertAll in C#
...e ConvertAll will loop through the underlying array without extra calls or range checks.
3) Select will create an extra IEnumerable<T> object.
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Why doesn't Haskell's Prelude.read return a Maybe?
... an instance of Show and Read) and that show . read is the identity on the range of show (i.e. show . read . show == show)
Having a Maybe in the type of read breaks the symmetry with show :: a -> String.
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How to add a new row to an empty numpy array
... during the loop:
In [210]: %%timeit
.....: l = []
.....: for i in xrange(1000):
.....: l.append([3*i+1,3*i+2,3*i+3])
.....: l = np.asarray(l)
.....:
1000 loops, best of 3: 1.18 ms per loop
In [211]: %%timeit
.....: a = np.empty((0,3), int)
.....: for i in xrange(1000):
...
IllegalArgumentException or NullPointerException for a null parameter? [closed]
...her than IllegalArgumentException. Similarly, if a caller passes an out-of-range value in a parameter representing an index into a sequence, IndexOutOfBoundsException should be thrown rather than IllegalArgumentException."
– Gili
Dec 29 '10 at 20:15
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Checking for empty arrays: count vs empty
...otime(true)-$time, 6) . "\n";
}
$iterations = 1000000;
$x = array();
$y = range(0, 10000000);
$actions = array(
"Empty empty()" => function() use($x){
empty($x);
},
"Empty count()" => function() use($x){
count($x);
},
"Full empty()" => function() use($y)...
On localhost, how do I pick a free port number?
...The main thing if you have a variable number of listeners is to allocate a range to your app - say 20000-21000, and CATCH EXCEPTIONS. That is how you will know if a port is unusable (used by another process, in other words) on your computer.
However, in your case, you shouldn't have a problem us...
Why doesn't Java Map extend Collection?
...ars in the bag).
This structure would allow intersection, union etc. of a range of "collections". Hence, the hierarchy should be:
Set
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Relation
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