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LEFT OUTER joins in Rails 3
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By default when you pass ActiveRecord::Base#joins a named association, it will perform an INNER JOIN. You'll have to pass a string representing your LEFT OUTER JOIN.
From the documentation:
:joins - Either an SQL fragment for additional joins like "LEFT JOIN
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Secure hash and salt for PHP passwords
...n't mix bcrypt and with the raw output of hash(), either use hex output or base64_encode it. (This applies to any input that may have a rogue \0 in it, which can seriously weaken security.)
Dos
Use scrypt when you can; bcrypt if you cannot.
Use PBKDF2 if you cannot use either bcrypt or scrypt, w...
Shell script “for” loop syntax
... @Flow: Hm, I just tried it on a couple of systems (Linux and BSD based) with #!/bin/sh and it worked fine. Invoked under bash and specifically under /bin/sh, still worked. Maybe the version of sh matters? Are you on some old Unix?
– system PAUSE
Mar 2...
MySQL INSERT INTO table VALUES.. vs INSERT INTO table SET
...he INSERT ... VALUES and INSERT ... SET forms of the statement insert rows based on explicitly specified values. The INSERT ... SELECT form inserts rows selected from another table or tables.
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Text border using css (border around text)
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I don't like that much solutions based on multiplying text-shadows, it's not really flexible, it may work for a 2 pixels stroke where directions to add are 8, but with just 3 pixels stroke directions became 16, and so on...
Not really confortable to manage.
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Is volatile expensive?
...zed block. Entering a synchronized block requires an atomic compareAndSet based write to take out the lock and a volatile write to release it. If the lock is contented then control has to pass from user space to kernel space to arbitrate the lock (this is the expensive bit). Accessing a volatile ...
Algorithm to find top 10 search terms
...h that we have to partition the table physically. Once partition scheme is based on ngrams of the token. If the token is a single word, it is 1gram. If the token is two-word phrase, it is 2gram. And this goes on. Roughly at 4gram we have 1 billion records, with table sized at around 60GB.
Processin...
List of macOS text editors and code editors [closed]
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CotEditor is a Cocoa-based open source text editor. It is popular in Japan.
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Is there a shortcut on Android Studio to convert a text to uppercase?
...l+Shift+U (Command+Shift+U on Mac) and should work since Android Studio is based off of it. Here's their documentation page.
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Cannot drop database because it is currently in use
I want to drop a database. I have used the following code, but to no avail.
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