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Why does comparing strings using either '==' or 'is' sometimes produce a different result?

...thon program where two variables are set to the value 'public' . In a conditional expression I have the comparison var1 is var2 which fails, but if I change it to var1 == var2 it returns True . ...
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Set 4 Space Indent in Emacs in Text Mode

I've been unsuccessful in getting Emacs to switch from 8 space tabs to 4 space tabs when pressing the TAB in buffers with the major mode text-mode . I've added the following to my .emacs : ...
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Entity framework self referencing loop detected [duplicate]

I have a strange error. I'm experimenting with a .NET 4.5 Web API, Entity Framework and MS SQL Server. I've already created the database and set up the correct primary and foreign keys and relationships. ...
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Not showing placeholder for input type=“date” field

...a phonegap app. When I am trying type="date" input field as shown below, it shows date picker in iPhone as I expected but it doesn't show the placeholder I have given. I found the same issue here in SO, but no solution anywhere. ...
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Read/Write 'Extended' file properties (C#)

I'm trying to find out how to read/write to the extended file properties in C# e.g. Comment, Bit Rate, Date Accessed, Category etc that you can see in Windows explorer. Any ideas how to do this? EDIT: I'll mainly be reading/writing to video files (AVI/DIVX/...) ...
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Create a tar.xz in one command

...d remember to man tar :) tar cfJ <archive.tar.xz> <files> Edit 2015-08-10: If you're passing the arguments to tar with dashes (ex: tar -cf as opposed to tar cf), then the -f option must come last, since it specifies the filename (thanks to @A-B-B for pointing that out!). In that case...
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Extending Angular Directive

...bably the simplest way to solve this is to create a directive on your app with the same name as the third party directive. Both directives will run and you can specify their run order using the priority property (higher priority runs first). The two directives will share scope and you can access a...
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How to convert a string to utf-8 in Python

...wser which sends utf-8 characters to my Python server, but when I retrieve it from the query string, the encoding that Python returns is ASCII. How can I convert the plain string to utf-8? ...
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How to show math equations in general github's markdown(not github's blog)

After investigating, I've found mathjax can do this. But when I write some example in my markdown file, it doesn't show the correct equations: ...
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How do I convert an object to an array?

...ties are declared private you should call this inside the class and return its results. Be careful, for primitive data types like strings it will work great, but I don't know how it behaves with nested objects. in your case you have to do something like; <?php print_r(get_object_vars($res...