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How do you rotate a two dimensional array?
...ith both increasing and decreasing counters that represent moving inwards, starting from the outermost layer. We’ll call this our ‘layer loop’.
def rotate(matrix):
size = len(matrix)
layer_count = size / 2
for layer in range(0, layer_count):
first = layer
last = ...
Regex to match a digit two or four times
... For anyone who, like me, didn't understand the use of (?: this starts a "non-capturing group" (a group that is not intended to be referenced in a replace statement). You could also just use parens but these will create a capturing group. Further details here: stackoverflow.com/question...
Git submodule inside of a submodule (nested submodules)
...strict;
use Cwd;
init_and_update();
exit;
sub init_and_update
{
my $start_path = cwd();
my %paths;
my $updated;
do
{
my $data = `find . -name '.gitmodules'`;
chomp($data);
$data =~ s/\/\.gitmodules//g;
foreach my $path (split(/\n/, $data))
...
How to get a index value from foreach loop in jstl
...d for Zeor base index or 1 one base index.
${loop.count}` it will give 1 starting base index.
${loop.index} it will give 0 base index as normal Index of array start from 0.
For Example :
<c:forEach var="currentImage" items="${cityBannerImages}" varStatus="loop">
<picture>
<...
Can someone explain Microsoft Unity?
...actory.GetInstance<IMyClass>()? Thanks for your help, this is a good start for me!
– Ryan Abbott
Mar 3 '09 at 23:25
3
...
When to use self over $this?
...
This answer would be even better if you started with a general rule rather than an exception. It's a matter of style, not of technical expertise. This is the best example I've ever seen of the difference between self:: and $this->, but it's a shame to hide that ...
How to use enums as flags in C++?
...
@Jamie, cardinals always start with 1, only ordinals may start with 0 or 1, depending on who you are talking to.
– Michael
Jul 7 '15 at 19:51
...
What does the [Flags] Enum Attribute mean in C#?
...k as one might expect in bitwise operations, because by default the values start with 0 and increment.
Incorrect declaration:
[Flags]
public enum MyColors
{
Yellow, // 0
Green, // 1
Red, // 2
Blue // 3
}
The values, if declared this way, will be Yellow = 0, Green = 1,...
How to open the Google Play Store directly from my Android application?
...ckageName(); // getPackageName() from Context or Activity object
try {
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + appPackageName)));
} catch (android.content.ActivityNotFoundException anfe) {
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https:/...
Postgresql query between date ranges
...
With dates (and times) many things become simpler if you use >= start AND < end.
For example:
SELECT
user_id
FROM
user_logs
WHERE
login_date >= '2014-02-01'
AND login_date < '2014-03-01'
In this case you still need to calculate the start date of the month you nee...