大约有 33,000 项符合查询结果（耗时：0.0434秒） [XML]
File input 'accept' attribute - is it useful?
...
If specified, the attribute must consist of a
set of comma-separated tokens,
each of which must be an
ASCII case-insensitive
match for one of the following:
The string audio/*
Indicates that sound files are accepted.
The string video/*
Indicates that video fi...
What is the “realm” in basic authentication
...ed by HTTP/1.1)
The realm attribute (case-insensitive) is required for all
authentication schemes which issue a challenge. The realm value
(case-sensitive), in combination with the canonical root URL of the
server being accessed, defines the protection space. These realms
allow the prote...
Git Push into Production (FTP)
...
github.com/banago/PHPloy also does a similar thing but works with submodules, which I suspect some of the mentioned tools might struggle with.
– Simon East
Apr 11 '14 at 12:44
...
converting drawable resource image into bitmap
... getting this ... ... E/CommitToConfigurationOperation: Malformed snapshot token (size): ... E/NotificationService: Not posting notification with icon==0: Notification(pri=0 contentView=null vibrate=null sound=content://settings/system/notification_sound defaults=0x0 flags=0x10 color=0x00000000 vis...
What does the line “#!/bin/sh” mean in a UNIX shell script?
...
It's called a shebang, and tells the parent shell which interpreter should be used to execute the script.
e.g.
#!/usr/bin/perl <--perl script'
#!/usr/bin/php <-- php script
#!/bin/false <--- do-nothing script, because ...
LaTeX Optional Arguments
...mmand that scans ahead to detect what characters are coming up next in the token stream and then inserts the relevant macros to process the argument(s) coming up as appropriate. This can be quite tedious (although not difficult) using generic TeX programming. LaTeX's \@ifnextchar is quite useful for...
Performance surprise with “as” and nullable types
...Partition III, 4.6):
Format: isinst typeTok
typeTok is a metadata token (a typeref, typedef or typespec), indicating the desired class.
If typeTok is a non-nullable value type or a generic parameter type it is interpreted as “boxed” typeTok.
If typeTok is a nullable type, Null...
How to convert a clojure keyword into a string?
...a '.', not a '/'
(namespace :foo/bar/baz) => throws exception: Invalid token: :foo/bar/baz
(namespace :foo.bar/baz) => "foo.bar"
And this also works with namespace qualified keywords:
;; assuming in the namespace foo.bar
(namespace ::baz) => "foo.bar"
(name ::baz) => "baz"
...
Format bytes to kilobytes, megabytes, gigabytes
... return round($bytes, $precision) . ' ' . $units[$pow];
}
(Taken from php.net, there are many other examples there, but I like this one best :-)
share
|
improve this answer
|
...
Rank function in MySQL
... (SELECT @curRank := 0) r
ORDER BY age;
The (SELECT @curRank := 0) part allows the variable initialization without requiring a separate SET command.
Test case:
CREATE TABLE person (id int, first_name varchar(20), age int, gender char(1));
INSERT INTO person VALUES (1, 'Bob', 25, 'M');
INSERT I...