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Is there a standard sign function (signum, sgn) in C/C++?
...
Surprised no one has posted the type-safe C++ version yet:
template <typename T> int sgn(T val) {
return (T(0) < val) - (val < T(0));
}
Benefits:
Actually implements signum (-1, 0, or 1). Implementations here using co...
Using the “animated circle” in an ImageView while loading stuff
I am currently using in my application a listview that need maybe one second to be displayed.
6 Answers
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Postgresql: Scripting psql execution with password
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Yep, it's deprecated (and so noted in one of the links). Since it's come up, it's probably also worth noting that the deprecation is hotly contested because it's extremely useful for many people yet can be used in some circumstances without serious security conc...
Getting rid of \n when using .readlines() [duplicate]
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One situation where this could hurt would be right-stripping a tab-separated value file in which some rows had multiple empty values in their right-most cells. Those rows would have length shorter than the others if one were ...
How to add elements to an empty array in PHP?
...array();
$cart[] = 13;
$cart[] = 14;
// etc
//Above is correct. but below one is for further understanding
$cart = array();
for($i=0;$i<=5;$i++){
$cart[] = $i;
}
echo "<pre>";
print_r($cart);
echo "</pre>";
Is the same as:
<?php
$cart = array();
array_push($cart, 13);
ar...
How to prevent form from being submitted?
... can not explain it more than Chris Baker did.
Both are correct, but none of them are "best" per se, and there may be
a reason the developer chose to use both approaches.
share
|
improve thi...
Best way to clear a PHP array's values
Which is more efficient for clearing all values in an array? The first one would require me to use that function each time in the loop of the second example.
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Django - “no module named django.core.management”
...(at least for that version of python).
It is possible you have more than one version of python installed and django is inside of another version. You can find out all the versions of python if you type python and then press TAB. Here are all the different python's I have.
$python
python ...
How to copy a java.util.List into another java.util.List
...st<SomeBean> that is populated from a Web Service. I want to copy/clone the contents of that list into an empty list of the same type. A Google search for copying a list suggested me to use Collections.copy() method. In all the examples I saw, the destination list was supposed to contain th...
How to import an existing X.509 certificate and private key in Java keystore to use in SSL?
...eps which I found in the comments/posts linked in the other answers:
Step one: Convert the x.509 cert and key to a pkcs12 file
openssl pkcs12 -export -in server.crt -inkey server.key \
-out server.p12 -name [some-alias] \
-CAfile ca.crt -caname root
Note: Make sure ...