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How can I maintain fragment state when added to the back stack?
... footprint), then there is high possibility you end up with the OutOfMemoryError since all of the fragments holds rootview reference and GC cant collect it. I think the better approach is to inflate the view all the time (and let Android system handle its view creation/destroying) and onActivityCrea...
How to get all Errors from ASP.Net MVC modelState?
I want to get all the error messages out of the modelState without knowing the key values. Looping through to grab all the error messages that the ModelState contains.
...
selecting unique values from a column
...nstead of using SELECT * ... use SELECT column 1, column 2... Unless you really do need all columns.
– LPChip
Nov 18 '17 at 20:43
...
How does free know how much to free?
...al markers that exist in the accounting information are often the cause of errors like "Memory arena corrupted" or "Double free" if you overwrite them or free them twice.
The padding (to make allocation more efficient) is why you can sometimes write a little bit beyond the end of your requested spa...
error: cannot dynamic_cast ‘b’ (of type ‘class Base*’) to type ‘c...
error: cannot dynamic_cast ‘b’ (of type ‘class Base*’) to type ‘class Derived*’ (source type is not polymorphic)在将父类型转换为子类型时,可以使用static_cast和dynamic_cast.如果使用dynamic_cast,它要求父类必须为多态的,即要求至少有一个虚函数,因此....
parsing JSONP $http.jsonp() response in angular.js
...elist
or explicitly trusted via:
$sce.trustAsResourceUrl(url)
success/error were deprecated.
The $http legacy promise methods success and error have been deprecated and will be removed in v1.6.0. Use the standard then method instead. If $httpProvider.useLegacyPromiseExtensions is set to fal...
Are there strongly-typed collections in Objective-C?
...ion of type 'NSString *'
And in Swift code, they will produce a compiler error:
var str: String = arr[0]
var num: Int = arr[0] //Error 'String' is not convertible to 'Int'
Lightweight Generics are intended to be used with NSArray, NSDictionary and NSSet, but you can also add them to your own cl...
Can the Android drawable directory contain subdirectories?
...
As of Android 2.2, this doesn't cause a compiler error, but any subdirectories are ignored when generating the R class. This really sucks, and makes it hard to manage larger projects. =/
– Nik Reiman
Jul 28 '10 at 8:42
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Best way to replace multiple characters in a string?
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Replacing two characters
I timed all the methods in the current answers along with one extra.
With an input string of abc&def#ghi and replacing & -> \& and # -> \#, the fastest way was to chain together the replacements like this: text.rep...
Is it possible to create static classes in PHP (like in C#)?
...uctor automatically (if you try and call self::__construct() you'll get an error).
Therefore you'd have to create an initialize() function and call it in each method:
<?php
class Hello
{
private static $greeting = 'Hello';
private static $initialized = false;
private static functi...