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Rails: create on has_one association

Hi (huge Rails newbie here), I have the following models: 4 Answers 4 ...
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How do I set a conditional breakpoint in gdb, when char* x points to a string whose value equals “he

Can I specify that I want gdb to break at line x when char* x points to a string whose value equals "hello" ? If yes, how? ...
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Validate uniqueness of multiple columns

Is there a rails-way way to validate that an actual record is unique and not just a column? For example, a friendship model / table should not be able to have multiple identical records like: ...
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Difference between database and schema

What's the difference between a Database and a Schema in SQL Server? Both are the containers of tables and data. 5 Answers ...
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How to check for Is not Null And Is not Empty string in SQL server?

How can we check in a SQL Server WHERE condition whether the column is not null and not the empty string ( '' )? 7 Answe...
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How to show git log history for a sub directory of a git repo?

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Java unchecked: unchecked generic array creation for varargs parameter

I have set Netbeans to show unchecked warnings in my Java code, but I am failing to understand the error on the following lines: ...
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How does Activity.finish() work in Android?

Could someone provide a description of what happens when an Activity calls its finish() method? 4 Answers ...
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How to change the decimal separator of DecimalFormat from comma to dot/point?

I have this little crazy method that converts BigDecimal values into nice and readable Strings. 6 Answers ...
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Android TextView with Clickable Links: how to capture clicks?

I have a TextView which is rendering basic HTML, containing 2+ links. I need to capture clicks on the links and open the links -- in my own internal WebView (not in the default browser.) ...