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Select elements by attribute
...he above will fall into the else-branch when myattr exists but is an empty string or "0". If that's a problem you should explicitly test on undefined:
if ($('#A').attr('myattr') !== undefined) {
// attribute exists
} else {
// attribute does not exist
}
...
Why is require_once so bad to use?
...red. Every *_once call means checking that log. So there's definitely some extra work being done there but enough to detriment the speed of the whole app?
... I really doubt it... Not unless you're on really old hardware or doing it a lot.
If you are doing thousands of *_once, you could do the wo...
How to select rows that have current day's timestamp?
... @ypercube oh i missed that but i was wondering why is the value on extra Using where; Using index?
– John Woo
Feb 8 '13 at 12:35
1
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How can I play sound in Java?
...y works with .wav format.
public static synchronized void playSound(final String url) {
new Thread(new Runnable() {
// The wrapper thread is unnecessary, unless it blocks on the
// Clip finishing; see comments.
public void run() {
try {
Clip clip = AudioSystem.getClip();
...
How to iterate over arguments in a Bash script
... when there are no positional parameters whereas "$*" expands to the empty string -- and yes, there is a difference between no arguments and one empty argument. See ${1:+"$@"} in /bin/sh`.
– Jonathan Leffler
Dec 12 '14 at 22:12
...
GridLayout and Row/Column Span Woe
...
It feels pretty hacky, but I managed to get the correct look by adding an extra column and row beyond what is needed. Then I filled the extra column with a Space in each row defining a height and filled the extra row with a Space in each col defining a width. For extra flexibility, I imagine these ...
How to change the output color of echo in Linux
...
It may be more convenient to insert tput's output directly into your echo strings using command substitution:
echo "$(tput setaf 1)Red text $(tput setab 7)and white background$(tput sgr 0)"
Example
The above command produces this on Ubuntu:
Foreground & background colour commands
tp...
Zip lists in Python
..., 'a'), (2, 'b'), (3, 'c')]
Input
Zero or more iterables [1] (ex. list, string, tuple, dictionary)
Output (list)
1st tuple = (element_1 of numbers, element_1 of letters)
2nd tuple = (e_2 numbers, e_2 letters)
…
n-th tuple = (e_n numbers, e_n letters)
List of n tuples:...
What is the most elegant way to remove a path from the $PATH variable in Bash?
...ultiple elements: in the first case, it adds the current dir (as the empty string; a potential security hole), in the second case it adds ` ` as a path element.
– Fred Foo
Mar 13 '11 at 17:26
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Is Using .NET 4.0 Tuples in my C# Code a Poor Design Decision?
... Couldn't appropriate documentation be useful here? For example, Scala's StringOps (basically a class of "extension methods" for Java's String) has a method parition(Char => Boolean): (String, String) (takes in predicate, returns tuple of 2 strings). It's obvious what the output is (obviously o...