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Testing for empty or nil-value string [duplicate]
I'm trying to set a variable conditionally in Ruby. I need to set it if the variable is nil or empty (0 length string). I've come up with the following:
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What is the meaning of the term arena in relation to memory?
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Why doesn't c++ have &&= or ||= for booleans?
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View/edit ID3 data for MP3 files
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Can anybody tell me how to set Artist property? There are a lot of related properties (FirstArtist, Artist, JointedArtists, FirstPerformer) and almost all of them are read-only or deprecated...
– Laserson
Oct 14 '...
git cherry-pick says “…38c74d is a merge but no -m option was given”
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The way a cherry-pick works is by taking the diff a changeset represents (the difference between the working tree at that point and the working tree of its parent), and applying it to your current branch.
So, if a commit has two or more parents, it also represents two or more diffs...
Regular vs Context Free Grammars
...erminals and non-terminals. Hence you can see that regular grammar is a subset of context-free grammar.
So for a palindrome for instance, is of the form,
S->ABA
A->something
B->something
You can clearly see that palindromes cannot be expressed in regular grammar since it needs to be ei...
How to use ADB Shell when Multiple Devices are connected? Fails with “error: more than one device an
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Another alternative would be to set environment variable ANDROID_SERIAL to the relevant serial, here assuming you are using Windows:
set ANDROID_SERIAL=7f1c864e
echo %ANDROID_SERIAL%
"7f1c864e"
Then you can use adb.exe shell without any issues.
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Is gcc 4.8 or earlier buggy about regular expressions?
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What is the purpose of std::make_pair vs the constructor of std::pair?
... sure that the extra copy will be elided in all cases, if the optimization settings of the compiler are high enough.
– Björn Pollex
Feb 19 '14 at 13:00
1
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How is __eq__ handled in Python and in what order?
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