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How to empty a list?
...explanation of del, I'd refer to the docs: docs.python.org/reference/simple_stmts.html#the-del-statement
– fortran
Sep 9 '09 at 16:28
14
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Android : difference between invisible and gone?
...Visibility=Gone then you have to initialize the component..like
eg Button _mButton = new Button(this);
_mButton = (Button)findViewByid(R.id.mButton);
so it will take more time as compared to Visibility = invisible.
share
...
Count number of occurrences of a pattern in a file (even on same line)
...color tags it prints out:
echo -e "a\nb b b\nc\ndef\nb e brb\nr" \
| GREP_COLOR="033" grep --color=always b \
| perl -e 'undef $/; $_=<>; s/\n//g; s/\x1b\x5b\x30\x33\x33/\n/g; print $_' \
| wc -l
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|
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UITapGestureRecognizer - single tap and double tap
...UITapGestureRecognizer(target: self, action:#selector(self.singleTapAction(_:)))
singleTap.numberOfTapsRequired = 1
view.addGestureRecognizer(singleTap)
let doubleTap = UITapGestureRecognizer(target: self, action:#selector(self.doubleTapAction(_:)))
doubleTap.numberOfTapsRequired = 2
view.addGestur...
Convert to binary and keep leading zeros in Python
...n using format():
>>> import timeit
>>> timeit.timeit("f_(v, '#010b')", "v = 14; f_ = format") # use a local for performance
0.40298633499332936
>>> timeit.timeit("f'{v:#010b}'", "v = 14")
0.2850222919951193
But I'd use that only if performance in a tight loop matters,...
What is WEB-INF used for in a Java EE web application?
...e following structure :
ApplicationName
|
|--META-INF
|--WEB-INF
|_web.xml <-- Here is the configuration file of your web app(where you define servlets, filters, listeners...)
|_classes <--Here goes all the classes of your webapp, following the package structure you ...
Java Serializable Object to Byte Array
... answered May 15 '18 at 7:06
gzg_55gzg_55
4122 bronze badges
...
adding multiple entries to a HashMap at once in one statement
... 2016) as follow:
Map<String, Integer> cities = Map.of("Brussels", 1_139000, "Cardiff", 341_000);
The var-args case for Map is a little bit harder, you need to have both keys and values, but in Java, methods can’t have two var-args parameters. So the general case is handled by taking a va...
Named placeholders in string formatting
...make one single pass through the format string.
– 200_success
May 15 '18 at 14:24
@200_success Yes good point talking ...
Using Regular Expressions to Extract a Value in Java
... edited Jan 28 '17 at 23:29
Miha_x64
3,92511 gold badge2828 silver badges5454 bronze badges
answered Oct 25 '08 at 21:47
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