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How to delete migration files in Rails 3
...rake db:migrate VERSION=XXX on all environments, to the version before the one I want to delete.
Delete the migration file manually.
If there are pending migrations (i.e., the migration I removed was not the last one), I just perform a new rake db:migrate again.
If your application is already on p...
How do you maintain development code and production code? [closed]
...e branches merged in master.
dev (or integration branch, or 'next') is the one where the feature branch selected for the next release are tested together
maintenance (or hot-fix) branch is the one for the current release evolution/bug fixes, with possible merges back to dev and or master
That kind...
What are some (concrete) use-cases for metaclasses?
...n-interactive plotting, as a frontend to Matplotlib. However, on occasion one wants to do interactive plotting. With only a couple functions I found that I was able to increment the figure count, call draw manually, etc, but I needed to do these before and after every plotting call. So to create ...
How to use LINQ to select object with minimum or maximum property value
...rty. Is there a way to use LINQ to query a list of Person objects for the one with the earliest/smallest DateOfBirth value.
...
Php multiple delimiters in explode
...effect on system speed, but you preffer to use easiest way for you (To be money effective)
– SergeS
May 21 '13 at 5:59
9
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How to compare strings in Bash
... And if you do need an else clause and want to make a crazy one-liner: [ "$x" == "valid" ] && echo "valid" || echo "invalid"
– Matt White
Mar 1 '13 at 13:32
...
How do I specify new lines on Python, when writing on files?
... as a suggestion, if we do not give a 'white space' after \n we do not get one space indent in second line. what i meant is: print 'First line \nSecond line'
– Manoj Kumar
Apr 1 '16 at 18:04
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List vs tuple, when to use each? [duplicate]
...ays for. But I've never quite squared this with the mutability issue mentioned in the other answers. Mutability has teeth to it (you actually can't change a tuple), while homogeneity is not enforced, and so seems to be a much less interesting distinction.
...
What are Maven goals and phases and what is their difference?
...ecute all build goals within that build phase. Build goals are assigned to one or more build phases. We can also execute a build goal directly.
There are three major built-in Build Life Cycles:
default
clean
site
Each Build Lifecycle is Made Up of Phases
For example the default lifecycle...
PowerShell: Run command from script's directory
... for. The others seem to be solving more problems than the straightforward one.
– Arvindh Mani
Aug 11 at 5:26
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