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What is the difference between `after_create` and `after_save` and when to use which?
... readers should note that, according to the docs, ActiveRecord's update_all does not invoke any callbacks, including after_*
– user2426679
Jan 10 at 19:34
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What is the best AJAX library for Django? [closed]
...ore robust. You can define the data format for your endpoints (xml vs json etc).
https://github.com/toastdriven/django-tastypie - Similar to piston, but I've had better luck with tastypie.
In the end they mostly work the same.
Define/include some predefined URL routes.
Register models/views/func...
CSS3 selector :first-of-type with class name?
...:first-of-type pseudo-class selects the first element of its type (div, p, etc). Using a class selector (or a type selector) with that pseudo-class means to select an element if it has the given class (or is of the given type) and is the first of its type among its siblings.
Unfortunately, CSS does...
Is it possible to cache POST methods in HTTP?
...the cached entity (per section 13.10), so that e.g. a subsequent GET must fetch a fersh copy and b) that the POST's response can be cached (per section 9.5), so that e.g. a subsequent POST can receive the same response?
– Diomidis Spinellis
Aug 14 '11 at 21:12
...
Difference between “@id/” and “@+id/” in Android
... Here is everything you need to know about naming conventions, etc for your resources. You would put the file in res/values/ and the convention is to name it ids but you can call it whatever you want. developer.android.com/guide/topics/resources/…
– Nathan Schwe...
Easiest way to check for an index or a key in an array?
... associative array)
[ ${array[key]+abc} ] && echo "exists"
Basically what ${array[key]+abc} does is
if array[key] is set, return abc
if array[key] is not set, return nothing
References:
See Parameter Expansion in Bash manual and the little note
if the colon is omitted, the ope...
Gesture recognizer and button actions
...nizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
// Disallow recognition of tap gestures in the segmented control.
if ((touch.view == yourButton)) {//change it to your condition
return NO;
}
return YES;
}
hope it will help
Edit
As Daniel noted you must con...
Returning an array using C
... use pointers for arrays when you return them. Being a new programmer, I really do not understand this at all, even with the many forums I have looked through.
...
How do you increase the max number of concurrent connections in Apache?
...ts 200
MinSpareThreads 25
MaxSpareThreads 75
ThreadsPerChild 25
First of all, whenever an apache is started, it will start 2 child processes which is determined by StartServers parameter. Then each process will start 25 threads determined by ThreadsPerChild parameter so this means 2 process can se...
Delimiters in MySQL
...limiter?
Because we want to pass the stored procedure, custom functions etc. to the server as a whole rather than letting mysql tool to interpret each statement at a time.
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