大约有 44,000 项符合查询结果（耗时：0.0469秒） [XML]
Making a WinForms TextBox behave like your browser's address bar
...etty straightforward and seems to work in all the scenarios (mousing down, selecting text, tabbing focus, etc.)
bool alreadyFocused;
...
textBox1.GotFocus += textBox1_GotFocus;
textBox1.MouseUp += textBox1_MouseUp;
textBox1.Leave += textBox1_Leave;
...
void textBox1_Leave(object sender, EventAr...
Why do most C developers use define instead of const? [duplicate]
...s is actually my preference in such a case.
enum { FIELD_WIDTH = 16384 };
char buf[FIELD_WIDTH];
In C++ this is a huge advantage as you can scope your enum in a class or namespace, whereas you cannot scope a #define.
In C you don't have namespaces and cannot scope an enum inside a struct, and am...
Get ffmpeg information in friendly way
...
Another usage of ffprobe which is nicely parseable:
ffprobe -v error -select_streams v:0 -show_entries stream=width,height,r_frame_rate,bit_rate,codec_name,duration -of csv=p=0:s=x video.mp4
results in:
h264x600x480x25/1x385.680000x542326
-select_streams v:0 selects only the video stream. I...
Appropriate datatype for holding percent values?
...to 1.00. For instance:
declare @discount numeric(9,9)
, @quantity int
select @discount = 0.999999999
, @quantity = 10000
select convert(money, @discount * @quantity)
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improve this ...
T-SQL: Selecting rows to delete via joins
...
DELETE FROM TableA a WHERE [filter condition on TableA]
AND (a.BId IN (SELECT a.BId FROM TableB b JOIN TableA a
ON a.BId = b.BId
WHERE [filter condition on TableB]))
(Note Interbase doesn't support the AS keyword for aliases)
...
Qt 5.1.1: Application failed to start because platform plugin “windows” is missing
...e main method before the QApplication call like this:
int main( int argc, char *argv[] )
{
QCoreApplication::addLibraryPath(".");
QApplication app( argc, argv );
...
return app.exec();
}
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Why doesn't String switch statement support a null case?
...
According to Java Docs:
A switch works with the byte, short, char, and int primitive data
types. It also works with enumerated types (discussed in Enum Types),
the String class, and a few special classes that wrap certain
primitive types: Character, Byte, Short, and Integer (disc...
OnChange event handler for radio button (INPUT type=“radio”) doesn't work as one value
...ame attribute myRadios to read the variable prev which holds the currently selected radio. A comparison is done within each click handler to decide if the clicked radio is the same as the one stored in prev and if not then the currently clicked radio is stored there. Within the click handler, you ha...
What do I need to do to get Internet Explorer 8 to accept a self signed certificate?
... certificate.”, choose “Continue to this website (not recommended).”
Select Tools➞Internet Options.
Select Security➞Trusted sites➞Sites.
Confirm the URL matches, and click “Add” then “Close”.
Close the “Internet Options” dialog box with either “OK” or “Cancel”.
Refres...
How can I make an entire HTML form “readonly”?
...e="text" name="something" placeholder="enter some text" />
<select>
<option value="0" disabled="disabled" selected="selected">select somethihng</option>
<option value="1">woot</option>
<option value="2">is</opt...