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Declare slice or make slice?
...lter(s []int, fn func(int) bool) []int {
var p []int // == nil
for _, v := range s {
if fn(v) {
p = append(p, v)
}
}
return p
}
It means that, to append to a slice, you don't have to allocate memory first: the nil slice p int[] is enough as a slice to ad...
delete map[key] in go?
...sions = map[string] chan int{};
sessions["moo"] = make (chan int);
_, ok := sessions["moo"];
if ok {
delete(sessions, "moo");
}
}
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What is the actual use of Class.forName(“oracle.jdbc.driver.OracleDriver”) while connecting to a dat
....forName("org.sqlite.JDBC");' do?
What is the purpose of 'Class.forName("MY_JDBC_DRIVER")'?
Loading JDBC driver
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...
OwinStartup not firing
...t there is no weapon against such bad decisions.
– ps_ttf
Jul 15 '16 at 9:50
23
Amazing. Every ti...
Doctrine and composite unique keys
...straint;
/**
* Common\Model\Entity\VideoSettings
*
* @Table(name="video_settings",
* uniqueConstraints={
* @UniqueConstraint(name="video_unique",
* columns={"video_dimension", "video_bitrate"})
* }
* )
* @Entity
*/
See @UniqueConstraint
...
Can I store images in MySQL [duplicate]
...h is not that difficult). I want to save the thumbs (since they are very small) in the database and I use MySQL. (I don't want to save the thumbs as physical files on the drive.)
Does MySQL allow saving and retrieving image data and how do I go about it? If it doesn't support image data, is there ...
What's the best way to cancel event propagation between nested ng-click calls?
... in it. Clicking the black overlay dismisses it; clicking the image will call a function that shows the next image.
9 Answ...
Cron and virtualenv
...e /path/to/virtualenv/bin/activate && /path/to/build/manage.py some_command > /dev/null
It's tricky to spot why this fails as /var/log/syslog doesn't log the error details. Best to alias yourself to root so you get emailed with any cron errors. Simply add yourself to /etc/aliases and ...
In HTML I can make a checkmark with ✓ . Is there a corresponding X-mark?
... Not the comprehensive list, but a start at w3schools.com/tags/ref_symbols.asp
– Bill the Lizard
Apr 3 '09 at 0:44
5
...
Using Vim's persistent undo?
...eep undo history across sessions by storing it in a file
if has('persistent_undo')
let myUndoDir = expand(vimDir . '/undodir')
" Create dirs
call system('mkdir ' . vimDir)
call system('mkdir ' . myUndoDir)
let &undodir = myUndoDir
set undofile
endif
...