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How does Rails keep track of which migrations have run for a database?
According to Rails doc: http://guides.rubyonrails.org/migrations.html
1 Answer
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How can I print literal curly-brace characters in python string and also use .format on it?
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The OP wrote this comment:
I was trying to format a small JSON for some purposes, like this: '{"all": false, "selected": "{}"}'.format(data) to get something like {"all": false, "selected": "1,2"}
It's pretty common that the "escaping braces" issue comes up when dealing with J...
How to implement has_many :through relationships with Mongoid and mongodb?
...uire multiple queries.
https://github.com/mongoid/mongoid/issues/544
Normally if you have a many-many relationship in a RDBMS you would model that differently in MongoDB using a field containing an array of 'foreign' keys on either side. For example:
class Physician
include Mongoid::Document
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String.format() to format double in java
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String.format("%1$,.2f", myDouble);
String.format automatically uses the default locale.
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How to go back (ctrl+z) in vi/vim
In normal text editors [with all due respect to Vim] there is a shortcut Ctrl + Z when you have done something nasty and want to return to the previous version of the text. Like BACK button in Word. I wonder how can you achieve this behaviour in Vim.
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How do I grab an INI value within a shell script?
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This is not really a good solution. Think of having 2 [parameters.ini] sections with each having a ' database_version' variable. You get the value twice then.
– nerdoc
May 26 '15 at 12:19
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What is the most efficient way to store a list in the Django models?
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This is probably what I will end up doing, but I was really hoping the underlying structure for this would have been built in. I guess I am to o lazy.
– grieve
Jul 10 '09 at 16:11
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Command line to remove an environment variable from the OS level configuration
...OBAR
If the variable is set in the system environment (e.g. if you originally set it with setx /M), as an administrator run:
REG delete "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment" /F /V FOOBAR
Note: The REG commands above won't affect any existing processes (and some new...
Simple conversion between java.util.Date and XMLGregorianCalendar
I'm looking for a simple method of converting between java.util.Date and javax.xml.datatype.XMLGregorianCalendar in both directions.
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Disable messages upon loading a package
...y R script is being used for further analysis I want to completely disable all of this output. How do I do that? Furthermore, I'd prefer to do it without having to modify ROCR at all, so that future users of this script don't have to do that either.
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