大约有 47,000 项符合查询结果（耗时：0.0494秒） [XML]
How to convert Nonetype to int or string?
...
10 Answers
10
Active
...
What is a lambda expression in C++11?
... be writing a whole class just to do something trivial and one off.
In C++03 you might be tempted to write something like the following, to keep the functor local:
void func2(std::vector<int>& v) {
struct {
void operator()(int) {
// do something
}
} f;
std::for_each(...
How to wait for 2 seconds?
...e required string format.
This will wait for 2 seconds:
WAITFOR DELAY '00:00:02';
The format is hh:mi:ss.mmm.
share
|
improve this answer
|
follow
|
...
How to convert byte array to Bitmap
...am blob = new ByteArrayOutputStream();
bitmap.compress(CompressFormat.PNG, 0 /* Ignored for PNGs */, blob);
byte[] bitmapdata = blob.toByteArray();
If bitmapdata is the byte array then getting Bitmap is done like this:
Bitmap bitmap = BitmapFactory.decodeByteArray(bitmapdata, 0, bitmapdata.length...
How to write a Ruby switch statement (case…when) with regex and backreferences?
... groups are always stored in pseudo variables $1 to $9:
case foo
when /^([0-9][0-9])/
print "the month is #{$1}"
else
print "something else"
end
You can also use the $LAST_MATCH_INFO pseudo variable to get at the whole MatchData object. This can be useful when using named captures:
case ...
Round a Floating Point Number Down to the Nearest Integer?
...
int(0.6) = 0 rather than 1
– Helin Wang
Nov 8 '13 at 0:05
...
Force page scroll position to top at page refresh in HTML
... method on DOM ready:
$(document).ready(function(){
$(this).scrollTop(0);
});
share
|
improve this answer
|
follow
|
...
Is there a better way to dynamically build an SQL WHERE clause than by using 1=1 at its beginning?
...nditions = new List<string>();
if (condition1) conditions.Add("Col1=0");
//...
if (conditions.Any())
Query += " WHERE " + string.Join(" AND ", conditions.ToArray());
share
|
improve this...
Python how to write to a binary file?
...do that.
Python 3.x:
>>> bytearray(newFileBytes)
bytearray(b'{\x03\xff\x00d')
>>> bytes(newFileBytes)
b'{\x03\xff\x00d'
Python 2.x:
>>> bytearray(newFileBytes)
bytearray(b'{\x03\xff\x00d')
>>> bytes(newFileBytes)
'[123, 3, 255, 0, 100]'
...