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How to create index on JSON field in Postgres?
In PostgreSQL 9.3 Beta 2 (?), how do I create an index on a JSON field? I tried it using the -> operator used for hstore but got the following error:
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Vim Configure Line Number Coloring
I'm looking for a way to configure the color used for line numbering (as in: :set nu ) in Vim. The default on most platforms seems to be yellow (which is also used for some highlighted tokens). I would like to color the line numbers a dim gray; somewhere in the vicinity of #555 . I'm not pick...
Java JUnit: The method X is ambiguous for type Y
I had some tests working fine. Then, I moved it to a different package, and am now getting errors. Here is the code:
3 Answ...
ThreadStatic v.s. ThreadLocal: is generic better than attribute?
[ThreadStatic] is defined using attribute while ThreadLocal<T> uses generic.
Why different design solutions were chosen?
What are the advantages and disadvantages of using generic over attributes in this case?
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Git number of commits per author on all branches
I'd like to get the number of commits per author on all branches. I see that
1 Answer
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Coredata Error “data: ”
I try to pull out data from CoreData with the following code
2 Answers
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Doctrine 2 can't use nullable=false in manyToOne relation?
An User has one Package associated with it. Many users can refer to the same package. User cannot exists without a Package defined. User should own the relation. Relation is bidirectional, so a Package has zero or more users in it.
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Does application.yml support environment variables?
I tried using env variables in my application.yml configration like:
2 Answers
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grepping using the “|” alternative operator
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difference between each.with_index and each_with_index in Ruby?
I'm really confused about the difference between each.with_index and each_with_index . They have different types but seem to be identical in practice.
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