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How to elegantly rename all keys in a hash in Ruby? [duplicate]
...to do ages = Hash[ages.map {|k, v| [mappings[k] || k, v] }] to be able to call the variable again with the mapping.
– Chanpory
Nov 9 '10 at 20:32
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What Git branching models work for you?
...r from branches from which one shouldn't push. (no specific solution here, all this need to be adapted to your environment)
How to avoid creating merge conflicts (due to cherry-pick)?
As stated by Jakub Narębski in his answer, cherry-picking should be reserved for rare situations where it is requ...
How are zlib, gzip and zip related? What do they have in common and how are they different?
The compression algorithm used in zlib is essentially the same as that in gzip and zip . What are gzip and zip ? How are they different and how are they same?
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How many characters can UTF-8 encode?
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UTF-8 does not use one byte all the time, it's 1 to 4 bytes.
The first 128 characters (US-ASCII) need one byte.
The next 1,920 characters need two bytes to encode. This covers the remainder of almost all Latin alphabets, and also Greek, Cyrilli...
Enabling error display in PHP via htaccess only
... configuration files (e.g. httpd.conf) and .htaccess files. You will need "AllowOverride Options" or "AllowOverride All" privileges to do so. php.net/manual/en/configuration.changes.php
– silex
May 25 '11 at 17:01
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How to edit incorrect commit message in Mercurial? [duplicate]
I am currently using TortoiseHg (Mercurial) and accidentally committed an incorrect commit message. How do I go about editing this commit message in the repository?
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What's the best strategy for unit-testing database-driven applications?
...ns that are driven by databases of varying complexity on the backend. Typically, there's an ORM layer separate from the business and presentation logic. This makes unit-testing the business logic fairly straightforward; things can be implemented in discrete modules and any data needed for the test...
What exactly are unmanaged resources?
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Managed resources basically means "managed memory" that is managed by the garbage collector. When you no longer have any references to a managed object (which uses managed memory), the garbage collector will (eventually) release that memory for you...
Finding all objects that have a given property inside a collection [duplicate]
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// put this in some class
public static <T> Collection<T> findAll(Collection<T> coll, Checker<T> chk) {
LinkedList<T> l = new LinkedList<T>();
for (T obj : coll) {
if (chk.check(obj))
l.add(obj);
}
return l;
}
Of course, li...
How to squash commits in git after they have been pushed?
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Squash commits locally with
git rebase -i origin/master~4 master
and then force push with
git push origin +master
Difference between --force and +
From the documentation of git push:
Note that --force applies to all the refs th...