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How do I convert a Ruby class name to a underscore-delimited symbol?
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Rails comes with a method called underscore that will allow you to transform CamelCased strings into underscore_separated strings. So you might be able to do this:
FooBar.name.underscore.to_sym
But you will have to install Activ...
Increment a database field by 1
... of say logins, how would I go about updating that field by 1 within a sql command?
5 Answers
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Select distinct values from a table field
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python numpy ValueError: operands could not be broadcast together with shapes
... both of the values can be expanded in one or more dimensions to make them compatible. This operation are called broadcasting. Dimensions where size is 1 or which are missing can be used in broadcasting.
In the example above the dimensions are incompatible, because:
97 2
2 1
Here there are ...
Markdown vs markup - are they related?
...: http://daringfireball.net/projects/markdown/
These days the term is more commonly used to refer to markup languages that mimic the style of the library. See: https://en.wikipedia.org/wiki/Markdown
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Guards vs. if-then-else vs. cases in Haskell
...le decision you need to make. Nested if..then..else-expressions are very uncommon in Haskell, and guards should almost always be used instead.
let absOfN =
if n < 0 -- Single binary expression
then -n
else n
Every if..then..else expression can be replaced by a guard if it is at the top ...
What is a StoryBoard ID and how can i use this?
...fier:@"MyViewController"];
[self presentViewController:vc animated:YES completion:nil];
}
This will create a MyCustomViewController based on the storyboard ViewController you named "MyViewController" and present it above your current View Controller
And if you are in your app delegate you cou...
Any way to modify Jasmine spies based on arguments?
... on the parameters. Is there any way to do this in Jasmine? The best I can come up with is a hack using andCallFake:
3 Answ...
How to import existing *.sql files in PostgreSQL 8.4?
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From the command line:
psql -f 1.sql
psql -f 2.sql
From the psql prompt:
\i 1.sql
\i 2.sql
Note that you may need to import the files in a specific order (for example: data definition before data manipulation). If you've got ba...