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NSObject +load and +initialize - What do they do?
...ng the circumstances leading a developer to override +initialize or +load. Documentation makes it clear these methods are called for you by the Objective-C runtime, but that's really all that is clear from the documentation of those methods. :-)
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How to do a newline in output
How do I make \n actually work in my output? At the moment it just writes it all in 1 long block. Thanks for any help
4 A...
How do I get indices of N maximum values in a NumPy array?
...a complete sort of the array. I wonder if numpy provides a built-in way to do a partial sort; so far I haven't been able to find one.
If this solution turns out to be too slow (especially for small n), it may be worth looking at coding something up in Cython.
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Are HTML Image Maps still used?
Do people still use the old HTML Image Maps? The ones with:
9 Answers
9
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Passing a method as a parameter in Ruby
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You want a proc object:
gaussian = Proc.new do |dist, *args|
sigma = args.first || 10.0
...
end
def weightedknn(data, vec1, k = 5, weightf = gaussian)
...
weight = weightf.call(dist)
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end
Just note that you can't set a default argument in a block declar...
how do I use the grep --include option for multiple file types?
When I want to grep all the html files in some directory, I do the following
7 Answers
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How do I iterate over the words of a string?
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This is a poor solution as it doesn't take any other delimiter, therefore not scalable and not maintable.
– HelloWorld
Jan 10 '11 at 3:57
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How do you write a migration to rename an ActiveRecord model and its table in Rails?
...elf.up
rename_table :old_table_name, :new_table_name
end
def self.down
rename_table :new_table_name, :old_table_name
end
end
I had to go and rename the model declaration file manually.
Edit:
In Rails 3.1 & 4, ActiveRecord::Migration::CommandRecorder knows how to reverse rename...
Why no ICloneable?
Is there a particular reason why a generic ICloneable<T> does not exist?
9 Answers
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What do 'real', 'user' and 'sys' mean in the output of time(1)?
What do 'real', 'user' and 'sys' mean in the output of time?
6 Answers
6
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