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Should 'using' directives be inside or outside the namespace?

...subtle) difference between the two. Imagine you have the following code in File1.cs: // File1.cs using System; namespace Outer.Inner { class Foo { static void Bar() { double d = Math.PI; } } } Now imagine that someone adds another file (File2.cs) to...
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Difference between angle bracket < > and double quotes “ ” while including header files in C++? [dup

...n angle bracket &lt; &gt; and double quotes " " while including header files in C++? 2 Answers ...
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How to write a Python module/package?

... A module is a file containing Python definitions and statements. The file name is the module name with the suffix .py create hello.py then write the following function as its content: def helloworld(): print "hello" Then you can imp...
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How to determine SSL cert expiration date from a PEM encoded certificate?

If I have the actual file and a Bash shell in Mac or Linux, how can I query the cert file for when it will expire? Not a web site, but actually the certificate file itself, assuming I have the csr, key, pem and chain files. ...
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Maximum filename length in NTFS (Windows XP and Windows Vista)?

I'm designing a database table which will hold filenames of uploaded files. What is the maximum length of a filename in NTFS as used by Windows XP or Vista? ...
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Is it possible to use Swift's Enum in Obj-C?

...aw value type as in @obj enum MyEnum: Int it will work fine on Objective-C files as mentioned before. If your enum is declared with another raw value type like @obj enum MyOtherEnum: String, you will not be able to use it on Objective-C files – jjramos Mar 17 '...
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How to parse a CSV file in Bash?

I'm working on a long Bash script. I want to read cells from a CSV file into Bash variables. I can parse lines and the first column, but not any other column. Here's my code so far: ...
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How to fix “Headers already sent” error in PHP

...intf, vprintf trigger_error, ob_flush, ob_end_flush, var_dump, print_r readfile, passthru, flush, imagepng, imagejpeg among others and user-defined functions. Raw HTML areas Unparsed HTML sections in a .php file are direct output as well. Script conditions that will trigger a header() call must ...
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How to generate an entity-relationship (ER) diagram using Oracle SQL Developer

...e a diagram for existing database schema or its subset as follows: Click File → Data Modeler → Import → Data Dictionary. Select a DB connection (add one if none). Click Next. Check one or more schema names. Click Next. Check one or more objects to import. Click Next. Click Finish. The ERD ...
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Count all occurrences of a string in lots of files with grep

I have a bunch of log files. I need to find out how many times a string occurs in all files. 15 Answers ...