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How to get the original value of an attribute in Rails
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Copied from Lucas Andrade's answer below: https://stackoverflow.com/a/50973808/9359123
Appending _was is deprecated in rails 5.1, now you should append _before_last_save
Something like:
before_save object
do_something_with object.name_before_last_save
end
Will return the name value bef...
Ways to iterate over a list in Java
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edited Jan 30 at 15:22
Olivier
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answered Aug 23 '13 at 19:29
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Difference between Select and ConvertAll in C#
...plemented only by List<T>. The ConvertAll method exists since .NET 2.0 whereas LINQ was introduced with 3.5.
You should favor Select over ConvertAll as it works for any kind of list, but they do the same basically.
sh...
Why doesn't Haskell's Prelude.read return a Maybe?
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Edit: As of GHC 7.6, readMaybe is available in the Text.Read module in the base package, along ...
Flask-SQLalchemy update a row's information
... Mark HildrethMark Hildreth
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All but last element of Ruby array
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130
Perhaps...
a = t # => [1, 2, 3, 4]
a.first a.size - 1 # => [1, 2, 3]
or
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How to change the font size on a matplotlib plot
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craymichael
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answered Oct 10 '10 at 11:49
Herman SchaafHerman Schaaf
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What events does an fire when it's value is changed?
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alex
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answered Oct 15 '10 at 7:30
Jacob Relkin...
Why is Cache-Control attribute sent in request header (client to server)?
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Cache-Control: no-cache is generally used in a request header (sent from web browser to server) ...
scopes with lambda and arguments in Rails 4 style?
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307
I think it should be:
scope :find_lazy, -> (id) { where(id: id) }
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