大约有 47,000 项符合查询结果（耗时：0.1014秒） [XML]
Get first day of week in PHP?
...= date('m-d-Y', strtotime('+'.(6-$day).' days'));
$day contains a number from 0 to 6 representing the day of the week (Sunday = 0, Monday = 1, etc.).
$week_start contains the date for Sunday of the current week as mm-dd-yyyy.
$week_end contains the date for the Saturday of the current week as mm-d...
Is returning null bad design? [closed]
I've heard some voices saying that checking for a returned null value from methods is bad design. I would like to hear some reasons for this.
...
Why are regular expressions so controversial? [closed]
...ithin a (?(DEFINE)...) block, so that you can separate out the declaration from the execution of individual named elements of your patterns. This makes them act rather like subroutines within the pattern.
A good example of this sort of “grammatical regex” can be found in this answer and this on...
How does this code generate the map of India?
...end of line. The number of characters drawn is a - 64. The value of c goes from 10 to 90, and resets to 10 when the end of line is reached.
The putchar
This can be rewritten as:
++c;
if (c==90) { //'Z' == 90
c = 10; //Note: 10 == '\n'
putchar('\n');
}
else {
if (b % 2 == ...
How to determine the content size of a UIWebView?
...= aWebView.scrollView.contentSize.height; // Get the corresponding height from the webView's embedded scrollView.
aWebView.frame = frame; // Set the scrollView contentHeight back to the frame itself.
}
Swift 4.x
func webViewDidFinishLoad(_ aWebView: UIWebView) {
aWebView.scrollVi...
Django Forms: if not valid, show form with error message
...
views.py
from django.contrib import messages
def view_name(request):
if request.method == 'POST':
form = form_class(request.POST)
if form.is_valid():
return HttpResponseRedirect('/thanks'/)
el...
Difference between angle bracket < > and double quotes “ ” while including header files in C++? [dup
...ectory over system headers. <> usually is used for system headers. From to the specification (Section 6.10.2):
A preprocessing directive of the form
# include <h-char-sequence> new-line
searches a sequence of implementation-defined places for a header identified uniquely b...
Behaviour of increment and decrement operators in Python
...parser is a blessing, not a curse. It puts us in handcuffs that prevent us from going overboard and ending up with funky grammar rules like some other dynamic languages that will go unnamed, such as Perl." I don't see how to disambiguate + + and ++ without breaking LL(1).
– Mik...
Calling Java varargs method with single null argument?
...
@ArunKumar asList() is a static import from the java.util.Arrays class. I just assumed it was obvious. Although now that I'm thinking about it, I probably should have just used Arrays.toString() since the only reason it gets converted to a List is so it will print...
What does the 'static' keyword do in a class?
...thod because the OP did. If instead it was a public method that was called from elsewhere, and the Hello class was instantiated more than once, then it could create a Clock instance for each Hello instance, unless clock was static.
– Paul Tomblin
Sep 3 '17 at 2...