大约有 15,000 项符合查询结果（耗时：0.0202秒） [XML]
Best way to give a variable a default value (simulate Perl ||, ||= )
...
return true;
} else {
return false;
}
}
function select_defined(){
$l = func_num_args();
$a = func_get_args();
for ($i=0; $i<$l; $i++){
if ($a[$i]) return $a[$i];
}
}
Examples:
// $foo ||= $bar;
set_unless_defined($foo, $bar);
//$foo = $baz ||...
Strangest language feature
... printf("LOL??!");
}
This will print LOL|, because the trigraph ??! is converted to |.
share
edited Dec 6 '11 at 23:49
...
Scanner vs. BufferedReader
...ion of read() or readLine() could
cause bytes to be read from the file, converted into characters, and
then returned, which can be very inefficient. Efficiency is improved
appreciably if a Reader is warped in a BufferedReader.
BufferedReader is synchronized, so read operations on a Buf...
How to get names of classes inside a jar file?
...e old MS-DOS FAT file system) and the -L option was given, the filename is converted to lowercase and is
prefixed with a caret (^).
share
|
improve this answer
|
follow
...
When do I need to use Begin / End Blocks and the Go keyword in SQL Server?
..., and IF statements, etc, where you need more then one step...
IF EXISTS (SELECT * FROM my_table WHERE id = @id)
BEGIN
INSERT INTO Log SELECT @id, 'deleted'
DELETE my_table WHERE id = @id
END
share
|
...
Superscript in CSS only?
...do not explicitly handle SUB, SUP, B, I and so on - they (kinda sorta) are converted into SPAN elements with appropriate CSS properties, and the rendering engine only deals with that.
The page is Appendix D. Default style sheet for HTML 4
The bits you want are:
small, sub, sup { font-size: .83em ...
How can I get the full/absolute URL (with domain) in Django?
...) is returned, but you can pass it a relative URL as the first argument to convert it to an absolute URL.
share
|
improve this answer
|
follow
|
...
Getting a slice of keys from a map
...
Is there a way to convert this to []string?
– Doron Behar
May 29 '19 at 15:13
add a comment
|
...
Is there a way to do repetitive tasks at intervals?
...(5 * time.Second)
quit := make(chan struct{})
go func() {
for {
select {
case <- ticker.C:
// do stuff
case <- quit:
ticker.Stop()
return
}
}
}()
You can stop the worker by closing the quit channel: close(quit).
...
JavaScript query string [closed]
....
From sugarjs.com:
Object.fromQueryString ( str , deep = true )
Converts the query string of a URL into an object. If deep is false,
conversion will only accept shallow params (ie. no object or arrays
with [] syntax) as these are not universally supported.
Object.fromQueryString('fo...