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Rails migrations: self.up and self.down versus change

Looks like the new rails version has "change" versus self.up and self.down methods. 3 Answers ...
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Nginx not picking up site in sites-enabled?

After over 10 hours of research I have not figured out why this doesn't work! I am trying to move my localhost to my sites-enabled folder which is in /etc/nginx/sites-enabled/default. ...
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Should I use encoding declaration in Python 3?

Python 3 uses UTF-8 encoding for source-code files by default. Should I still use the encoding declaration at the beginning of every source file? Like # -*- coding: utf-8 -*- ...
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When to use Preorder, Postorder, and Inorder Binary Search Tree Traversal strategies

I realized recently that while having used BST's plenty in my life, I've never even contemplated using anything but Inorder traversal (while I am aware of and know how easy it is to adapt a program to use pre/post-order traversal). ...
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What are the “loose objects” that the Git GUI refers to?

When I open the Git GUI , I get a popup message that refers to loose objects . I did git gc and that removed the message. ...
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What does “all” stand for in a makefile?

I read some tutorials concerning Makefiles but for me it is still unclear for what the target "all" stands for and what it does. ...
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When annotating a class with @Component, does this mean it is a Spring Bean and Singleton?

Being fairly new to Spring I have a question about annotating a class. When annotating a class with @Component does this mean this class will be a Spring Bean and by default a singleton? ...
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How to hide databases that I am not allowed to access

When I connect to my Heroku - Postgresql database via pgAdmin3 , It lists all the tables (about 2600). Every time I open the pgAdmin3 I have to find my own database. ...
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What is `params.require(:person).permit(:name, :age)` doing in Rails 4?

All the examples of strong parameters in Rails 4 docs use 2 Answers 2 ...
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IE7 does not understand display: inline-block

Can someone please help me get my head around this bug? With Firefox its working fine but with Internet Explorer 7 its not. It seems not to understand the display: inline-block; . ...