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Why NSUserDefaults failed to save NSMutableDictionary in iOS?
...h NSData. Then use UserDefaults save the NSData.
When I need the data, I read out the NSData, and use NSKeyedUnarchiver to convert NSData back to the object.
It is a little cumbersome, because i need to convert to/from NSData everytime, but it just works.
Here is one example per request:
Save:...
GetType() can lie?
...wing question asked a few days ago in SO: GetType() and polymorphism and reading Eric Lippert's answer, I started thinking if making GetType() not be virtual really ensured that an object could not lie about its Type .
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Simple Getter/Setter comments
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@Trejkaz: Not true, because accessor methods allow for read-only or write-only properties, and for polymorphism (and so wrapping, proxying, and so on).
– Laurent Pireyn
Apr 29 '11 at 12:20
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Python `if x is not None` or `if not x is None`?
...is y. Although the compiler will always treat it as not (x is y), a human reader might misunderstand the construct as (not x) is y. If I write x is not y then there is no ambiguity.
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“Origin null is not allowed by Access-Control-Allow-Origin” error for request made by application ru
...defining the callback=? so that you can use an anonymous function. You may read more about it in the documentation.
Another remark is that you shouldn't call eval. The parameter passed to your anonymous function will already be parsed into JSON by jQuery.
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Xcode duplicate/delete line
...the sharing & permissions setting (By pressing the lock) and set it to Read & Write for all.
Enter the folder and find the file IDETextKeyBindingSet.plist. Right Click it, press Get Info, unlock the sharing & permissions setting (By pressing the lock) and set it to Read & Write for a...
How to insert an element after another element in JavaScript without using a library?
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If you already have the element constructed, you can use .insertAdjacentElement()
– GetFree
Mar 13 '18 at 17:05
7
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Why do people say there is modulo bias when using a random number generator?
...ll rarely require more than one call to rand().
Works cited and further reading:
CPlusPlus Reference
Eternally Confuzzled
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How to turn on (literally) ALL of GCC's warnings?
...t really want all warnings, you just think you do.
Go through the manual, read about them, decide which you might want to enable, try them. Reading your compiler's manual is a Good ThingTM anyway, taking a short cut and enabling warnings you don't understand is not a very good idea, especially if ...
How to access session variables from any class in ASP.NET?
...ary), using System.Web.HttpContext.Current.Session["loginId"].
But please read on for my original answer...
I always use a wrapper class around the ASP.NET session to simplify access to session variables:
public class MySession
{
// private constructor
private MySession()
{
Pr...