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Using Default Arguments in a Function
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I would propose changing the function declaration as follows so you can do what you want:
function foo($blah, $x = null, $y = null) {
if (null === $x) {
$x = "some value";
}
if (null === $y) {
$y = "some other value";
}
code here!
}
This way, you can make...
Why are arrays covariant but generics are invariant?
...quality using the Object.equals method on the elements. The implementation does not depend on the exact type of element stored in the array, so it should be possible to write a single function that works on all types of arrays. It is easy to implement functions of type
boolean equalArrays (Object[]...
I ran into a merge conflict. How can I abort the merge?
...unio Hamano (the Git maintainer). As noted in the link, instead you would do this:
git fetch origin
git reset --hard origin
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Setting default values for columns in JPA
...s it possible to set a default value for columns in JPA, and if, how is it done using annotations?
18 Answers
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Disabling implicit animations in -[CALayer setNeedsDisplayInRect:]
...wInContext: method. I'm trying to minimize the amount of drawing I need to do, so I'm using -setNeedsDisplayInRect: to update just the changed parts. This is working splendidly. However, when the graphics system updates my layer, it's transitioning from the old to the new image using a cross-fade. I...
Which is faster: while(1) or while(2)?
...bel without even comparing a value against true, and of course immediately does so again until the program is somehow ended. This directly corresponds to the C/C++ code:
L2:
goto L2;
Edit:
Interestingly enough, even with no optimizations, the following loops all produced the exact same output (...
Are there benefits of passing by pointer over passing by reference in C++?
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I just don't buy this. Yes, you pass in a pointer, so therefore it must be an output parameter, because what's pointed to can't be const?
– deworde
Dec 12 '12 at 10:06
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Twitter Bootstrap alert message close and open again
...ou are lazy (which is no good thing if you want an maintainable app).
The do-it-right method:
Create a new data attribute for hiding an element.
Javascript:
$(function(){
$("[data-hide]").on("click", function(){
$("." + $(this).attr("data-hide")).hide()
// -or-, see below
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Python constructors and __init__
...d starting point. For Python-specific stuff, I highly recommend the Python docs.
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What's wrong with this 1988 C code?
...ns of IN and OUT.
The lesson learned here is that preprocessor statements do not have to end with a semicolon.
Also, you should always use braces!
if (c == ' ' || c == '\n' || c == '\t') {
state = OUT;
} else if (state == OUT) {
state = IN;
++nw;
}
There is n...