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Help with C# generics error - “The type 'T' must be a non-nullable value type”
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182
You need to add a T : struct constraint:
public static Nullable<T> CoalesceMax<T>
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When to add what indexes in a table in Rails
...e time.
An Index like this would speed the following request up:
# rails 2
User.find(:all, :conditions => { :state_id => some_id, :category_id => some_other_id })
# rails 3
User.where(:state_id => some_id, :category_id => some_other_id)
Where
add_index :users, :category_id
add_i...
How to find an element by matching exact text of the element in Capybara
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ndnenkov
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answered Jan 31 '14 at 18:03
John WJohn W
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PostgreSQL return result set as JSON array?
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2 Answers
2
Active
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Converting pfx to pem using openssl
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112
You can use the OpenSSL Command line tool. The following commands should do the trick
openssl p...
How do I embed a single file from a GitHub gist with the new gist interface?
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answered Jan 10 '13 at 21:15
Roland KuhnRoland Kuhn
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What's the difference between Protocol Buffers and Flatbuffers?
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128
I wrote a detailed comparison of a few serialization systems, including Protobufs and FlatBuffe...
LINQ Distinct operator, ignore case?
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233
StringComparer does what you need:
List<string> list = new List<string>() {
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Unique constraint on multiple columns
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294
By using the constraint definition on table creation, you can specify one or multiple constrai...