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What is the difference between require and require-dev sections in composer.json?

I'm beginning using composer, I know so little about it and have a little experience with web application development. 6 An...
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What is the recommended way to delete a large number of items from DynamoDB?

...o do is call LogTable.DeleteItem(user_id) - Without supplying the range, and have it delete everything for me. An understandable request indeed; I can imagine advanced operations like these might get added over time by the AWS team (they have a history of starting with a limited feature set firs...
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How to write a switch statement in Ruby

...Ruby uses the case expression instead. case x when 1..5 "It's between 1 and 5" when 6 "It's 6" when "foo", "bar" "It's either foo or bar" when String "You passed a string" else "You gave me #{x} -- I have no idea what to do with that." end Ruby compares the object in the when clause wit...
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What is the difference between 'my' and 'our' in Perl?

... Great question: How does our differ from my and what does our do? In Summary: Available since Perl 5, my is a way to declare non-package variables, that are: private new non-global separate from any package, so that the variable cannot be accessed in the form of ...
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passport.js RESTful auth

How does one handle authentication (local and Facebook, for example) using passport.js, through a RESTful API instead of through a web interface? ...
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MySQL: multiple tables or one table with many columns?

... Any time information is one-to-one (each user has one name and password), then it's probably better to have it one table, since it reduces the number of joins the database will need to do to retrieve results. I think some databases have a limit on the number of columns per table, but...
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When and why should I use fragments in Android applications? [duplicate]

... the different parts of my applications to have their own special behavior and UI, and I don't know how fragments can help. In most cases, I think it is quicker to create 2 different activities (e.g., 1 for tablets and 1 for handsets), and to share the common behaviors and events in a third class. ...
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Why Qt is misusing model/view terminology?

...ation page they state, that they simplified the MVC to MV by merging View and Controller and they are giving the following picture: ...
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“To Do” list before publishing Android app to market [closed]

I'm just about ready to publish my first app to the Android market, and I'd like to know if any of you have any tips about any experiences you may have encountered in regard to publishing an app that goes beyond the obvious and already documented. ...
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How should I print types like off_t and size_t?

I'm trying to print types like off_t and size_t . What is the correct placeholder for printf() that is portable ? 9 ...