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rails 3 validation on uniqueness on multiple attributes
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In Rails 2, I would have written:
validates_uniqueness_of :zipcode, :scope => :recorded_at
In Rails 3:
validates :zipcode, :uniqueness => {:scope => :recorded_at}
For multiple attributes:
validates :zipcode, :uniquenes...
How to read keyboard-input?
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127
try
raw_input('Enter your input:') # If you use Python 2
input('Enter your input:') # I...
Eclipse: Files opened by multiple searches using same editor tab
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2 Answers
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How do you append to an already existing string?
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215
In classic sh, you have to do something like:
s=test1
s="${s}test2"
(there are lots of vari...
Hide files with certain extension in Sublime Text Editor?
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How to tell if rails is in production?
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2 easy ways:
tail -f log/production.log
if there are entries populating that log after you hit the app, you're in production mode.
second way:
in one of your views (probably the layout is good), just add
<%= "Environ...
Specify pane percentage in tmuxinator project
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$ tmux list-windows
0: ksh [159x48]
layout: bb62,159x48,0,0{79x48,0,0,79x48,80,0}
$ tmux select-layout bb62,159x48,0,0{79x48,0,0,79x48,80,0}
tmux automatically adjusts the size of the layout for the current window
size. Note that a layout cannot be applied to a...
matplotlib.pyplot will not forget previous plots - how can I flush/refresh?
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What does the forward slash mean in the CSS font shorthand?
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2 Answers
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