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Iterate all files in a directory using a 'for' loop

How can I iterate over each file in a directory using a for loop? 17 Answers 17 ...
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Why do people use Heroku when AWS is present? What distinguishes Heroku from AWS? [closed]

I'm a beginner RoR programmer who's planning to deploy my app using Heroku. Word from my other advisor friends says that Heroku is really easy, good to use. The only problem is that I still have no idea what Heroku does... ...
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How do I alter the position of a column in a PostgreSQL database table?

I've tried the following, but I was unsuccessful: 9 Answers 9 ...
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What are good alternatives to SQL (the language)? [closed]

I occasionally hear things about how SQL sucks and it's not a good language, but I never really hear much about alternatives to it. So, are other good languages that serve the same purpose (database access) and what makes them better than SQL? Are there any good databases that use this alternative l...
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How do I return multiple values from a function in C?

If I have a function that produces a result int and a result string , how do I return them both from a function? 8 Answe...
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Find the index of a dict within a list, by matching the dict's value

I have a list of dicts: 9 Answers 9 ...
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How do I sort a dictionary by value?

I have a dictionary of values read from two fields in a database: a string field and a numeric field. The string field is unique, so that is the key of the dictionary. ...
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Why can't I reference my class library?

I have a solution that contains a website and a class library in Visual Studio 2008. 20 Answers ...
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Why do we need break after case statements?

Why doesn't the compiler automatically put break statements after each code block in the switch? Is it for historical reasons? When would you want multiple code blocks to execute? ...
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A numeric string as array key in PHP

Is it possible to use a numeric string like "123" as a key in a PHP array, without it being converted to an integer? 11 A...