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django - why is the request.POST object immutable?
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It's a bit of a mystery, isn't it? Several superficially plausible theories turn out to be wrong on investigation:
So that the POST object doesn't have to implement mutation methods? No: the POST object belongs to the django.http.QueryDict class, which implements a full set ...
How do I expire a PHP session after 30 minutes?
...ms with filesystems where atime tracking is not available.
So it additionally might occur that a session data file is deleted while the session itself is still considered as valid because the session data was not updated recently.
And second:
session.cookie_lifetime
session.cookie_lifetime ...
What is the difference between self-types and trait subclasses?
...nt A.
Consider the following examples:
scala> trait User { def name: String }
defined trait User
scala> trait Tweeter {
| user: User =>
| def tweet(msg: String) = println(s"$name: $msg")
| }
defined trait Tweeter
scala> trait Wrong extends Tweeter {
| def n...
How do I create a nice-looking DMG for Mac OS X using command-line tools?
...Create a new DMG, writeable(!), big enough to hold the expected binary and extra files like readme (sparse might work).
Mount the DMG and give it a layout manually in Finder or with whatever tools suits you for doing that (see FileStorm link at the bottom for a good tool). The background image is us...
Why is it not possible to extend annotations in Java?
...is:
@Target(ElementType.ANNOTATION_TYPE)
public @interface Category {
String category();
}
@Category(category="validator")
public @interface MyFooBarValidator {
}
As you can see, you can easily group and categorize annotations without undue pain using the provided facilities.
So, KISS is...
Easiest way to check for an index or a key in an array?
...s actually adapted from the answers for this SO question: How to tell if a string is not defined in a bash shell script?
A wrapper function:
exists(){
if [ "$2" != in ]; then
echo "Incorrect usage."
echo "Correct usage: exists {key} in {array}"
return
fi
eval '[ ${'$3'[$1]+...
Xcode doesn't show the line that causes a crash
Every time my app crashes Xcode highlights the UIApicationMain() call in the main() function as the line that caused the crash. In some cases that used to be normal (segmentation fault for example) but the crash I am trying to deal with is a simple SIGABRT with detailed information logged in the con...
What's the difference between dependencies, devDependencies and peerDependencies in npm package.json
...ding test dependencies as regular dependencies introduces a whole bunch of extra libraries, each of which may fail in some way. I would lean (pun!) towards light-weight production servers with as little code on them as possible. Remember, the best code is no code!
– Stijn de Wi...
Specifying column name in a “references” migration
...eferences :col_name, references: other_table_name works without installing extra gems.
– Qqwy
Sep 9 '19 at 14:26
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Draw multi-line text to Canvas
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Yes. I just added an example. Use String.Split to split at the '\n's and then offset each one.
– Icemanind
Jul 20 '11 at 4:28
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