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Sequence contains no elements?
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answered Aug 24 '09 at 19:23
Ryan LundyRyan Lundy
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Merge Images Side by Side(Horizontally)
...es: 600x30, 600x30, 600x30, 600x30, 810x30. Their names are: 0.png, 1.png, 2.png, 3.png, 4.png, respectively.
5 Answers
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How to loop through files matching wildcard in batch file
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295
Assuming you have two programs that process the two files, process_in.exe and process_out.exe:...
Rails detect if request was AJAX
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249
You can check for a header[X-Requested-With] to see if it is an AJAX request. Here is a good a...
Adding git branch on the Bash command prompt
...ple (Mac OS X 10.15):
$ find / -name 'git-prompt.sh' -type f -print -quit 2>/dev/null
/Library/Developer/CommandLineTools/usr/share/git-core/git-prompt.sh
Option 2: Pull the script from GitHub.
Next, add the following line to your .bashrc/.zshrc:
source ~/.git-prompt.sh
Finally, change you...
Testing modules in rspec
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221
The rad way =>
let(:dummy_class) { Class.new { include ModuleToBeTested } }
Alternativel...
Iterate a list as pair (current, next) in Python
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132
Here's a relevant example from the itertools module docs:
import itertools
def pairwise(iterabl...
Troubleshooting “The use statement with non-compound name … has no effect”
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answered Feb 16 '12 at 18:42
Lightness Races in OrbitLightness Races in Orbit
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git rebase, keeping track of 'local' and 'remote'
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247
TL;DR;
To summarize (As Benubird comments), when:
git checkout A
git rebase B # rebase ...
Validate uniqueness of multiple columns
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321
You can scope a validates_uniqueness_of call as follows.
validates_uniqueness_of :user_id, :s...