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How to check if an NSDictionary or NSMutableDictionary contains a key?
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edited Feb 18 '13 at 22:56
s4y
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Object reference not set to an instance of an object.Why doesn't .NET show which object is `null`?
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Consider this code:
String s = null;
Console.WriteLine(s.Length);
This will throw a NullReferenceException in the second line and you want to know why .NET doesn't tell you that it was s that was null when the exception was thrown.
To understand why you don't get that ...
Linux error while loading shared libraries: cannot open shared object file: No such file or director
Program is part of the Xenomai test suite, cross-compiled from Linux PC into Linux+Xenomai ARM toolchain.
18 Answers
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What do 'lazy' and 'greedy' mean in the context of regular expressions?
...ressions.info/repeat.html we see the example of trying to match HTML tags with <.+>. Suppose you have the following:
<em>Hello World</em>
You may think that <.+> (. means any non newline character and + means one or more) would only match the <em> and the </em>...
What is the advantage of using heredoc in PHP? [closed]
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The heredoc syntax is much cleaner to me and it is really useful for multi-line strings and avoiding quoting issues. Back in the day I used to use them to construct SQL queries:
$sql = <<<SQL
select *
from $tablename
where id in [$order_ids_list]
and pr...
'Microsoft.SqlServer.Types' version 10 or higher could not be found on Azure
I'm trying to make a webapi in ASP.NET MVC 4. The webapi used Entity Framework 5 Spatial types and i have wrote a very simple code.
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back button callback in navigationController in iOS
...hed a view onto the navigation controller and when I press the back button it goes to the previous view automatically. I want to do a few things when back button is pressed before popping the view off the stack. Which is the back button callback function?
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LINQ Contains Case Insensitive
This code is case sensitive, how to make it case insensitive?
11 Answers
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MongoDB: Is it possible to make a case-insensitive query?
...lue on the way in rather than incurring the extra cost every time you find it. Obviously this wont work for people's names and such, but maybe use-cases like tags.
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How to create an HTML button that acts like a link?
...reate an HTML button that acts like a link. So, when you click the button, it redirects to a page. I would like it to be as accessible as possible.
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