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JavaScript hard refresh of current page
...ves a true value as argument, it will cause the page to always be reloaded from the server. If it is false or not specified, the browser may reload the page from its cache.
More info:
The location object
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#if DEBUG vs. Conditional(“DEBUG”)
... release mode (i.e. no DEBUG symbol), it will forever have the call to B() from within A() omitted, even if a call to A() is included because DEBUG is defined in the calling assembly.
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improv...
How would you implement an LRU cache in Java?
...use encapsulation here instead of inheritance. This is something I learned from Effective Java.
– Kapil D
Feb 8 '12 at 23:04
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Unbalanced calls to begin/end appearance transitions for
...the tab bar controller's view controllers. Always present view controllers from the topmost view controller, which means in this case ask the tab bar controller to present the overlay view controller on behalf of the view controller. You can still keep any callback delegates to the real view control...
php $_POST array empty upon form submission
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I also had a similar problem, it was coming from my .htaccess file. It was stripping the .php extension from the URL, and my form was POSTing to the URL with the extension.
– Emanuel Vintilă
Feb 28 '16 at 12:29
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Java: when to use static methods
...and it shouldn't, since your project's special characters may be different from the other project's), and you can't add it (since Java is somewhat sane), so you create an utility class, and call removeSpecialChars(s) instead of s.removeSpecialChars(). Sweet.
Purity: taking some precautions, your sta...
Resize fields in Django Admin
... ModelAdmin.formfield_overrides.
It is quite easy - in admin.py, define:
from django.forms import TextInput, Textarea
from django.db import models
class YourModelAdmin(admin.ModelAdmin):
formfield_overrides = {
models.CharField: {'widget': TextInput(attrs={'size':'20'})},
mode...
Determining complexity for recursive functions (Big O notation)
...Fun2(n-5);
}
This function is called n-5 for each time, so we deduct five from n before calling the function, but n-5 is also O(n).
(Actually called order of n/5 times. And, O(n/5) = O(n) ).
int recursiveFun3(int n)
{
if (n <= 0)
return 1;
else
return 1 + recursiveFun3(n...
Getting time elapsed in Objective-C
...ing when the device enters sleep. If you test with the device disconnected from a computer, lock it, then wait ~10 minutes you will find that CACurrentMediaTime() does not keep up with wall clock time.
– russbishop
Apr 5 '15 at 21:13
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How to enable mod_rewrite for Apache 2.2
...the existence of AllowOverride all in the VirtualHost file will prevent it from working - this is what caught me out, changing it to AllowOverride all worked like a charm :)
– HeavenCore
Feb 19 '13 at 14:48
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