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advantage of tap method in ruby
...er:
user = User.new
user.username = "foobar"
user.save!
they would have to follow all the three lines and then recognize that it is just creating an instance named user.
If it were:
user = User.new.tap do |u|
u.username = "foobar"
u.save!
end
then that would be immediately clear. A reader...
Can't subtract offset-naive and offset-aware datetimes
...stamptz field in PostgreSQL. When I pull data from the table, I then want to subtract the time right now so I can get it's age.
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DbEntityValidationException - How can I easily tell what caused the error?
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The easiest solution is to override SaveChanges on your entities class. You can catch the DbEntityValidationException, unwrap the actual errors and create a new DbEntityValidationException with the improved message.
Create a partial class next to ...
Best way to do nested case statement logic in SQL Server
I'm writing an SQL Query, where a few of the columns returned need to be calculated depending on quite a lot of conditions.
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Struct constructor: “fields must be fully assigned before control is returned to the caller.”
Here is a struct I am trying to write:
5 Answers
5
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How to make a Java Generic method static?
The following is a snippet on how to make a java generic class to append a single item to an array. How can I make appendToArray a static method. Adding static to the method signature results in compile errors.
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How to use phpexcel to read data and insert into database?
I have a php application where I want to read data from excel, Insert into database and then generate pdf reports for specific users.
I searched a lot but nothing specific given about both things.
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Javascript: Round up to the next multiple of 5
I need a utility function that takes in an integer value (ranging from 2 to 5 digits in length) that rounds up to the next multiple of 5 instead of the nearest multiple of 5. Here is what I got:
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Variable declared in for-loop is local variable?
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The reason you are not allowed to define a variable with the same name in both the for-loop as well as outside the for-loop is because variables in the outer-scope are valid in the inner-scope. Meaning that there would be two 'i' variables within the for-l...
What's the best way to do a backwards loop in C/C#/C++?
I need to move backwards through an array, so I have code like this:
14 Answers
14
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