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Get the value of an instance variable given its name
... is:
class Computer
attr_reader :cpus
end
Now you can do Computer.new(4).cpus.
Note that you can reopen any existing class and make a private ivar into a reader. Since an accessor is just a method, you can do Computer.new(4).send(var_that_evaluates_to_cpus)
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include external .js file in node.js app
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edited Oct 1 '14 at 15:20
Flimzy
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VIM ctrlp.vim plugin: how to rescan files?
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answered Dec 29 '11 at 4:05
JeetJeet
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What's the difference between globals(), locals(), and vars()?
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Ethan FurmanEthan Furman
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Ruby on Rails patterns - decorator vs presenter
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104
A decorator is more of a "let's add some functionality to this entity". A presenter is more of a...
Skip Git commit hooks
...y-run push.
Only git push --no-verify would skip the hook.
Note: Git 2.14.x/2.15 improves the --no-verify behavior:
See commit 680ee55 (14 Aug 2017) by Kevin Willford (``).
(Merged by Junio C Hamano -- gitster -- in commit c3e034f, 23 Aug 2017)
commit: skip discarding the index if there is...
How do I get the resource id of an image if I know its name?
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answered Jun 15 '10 at 9:46
Francesco LauritaFrancesco Laurita
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What's the difference between “Normal Reload”, “Hard Reload”, and ...
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449
Normal reload
The same thing as pressing F5. This will use the cache but revalidate everything...
Extract elements of list at odd positions
... second at 1 etc.):
1, 3, 5
so the result (actual numbers) will be:
2, 4, 6
Explanation
The [1::2] at the end is just a notation for list slicing. Usually it is in the following form:
some_list[start:stop:step]
If we omitted start, the default (0) would be used. So the first element (at po...
How to perform OR condition in django queryset?
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