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List all sequences in a Postgres db 8.1 with SQL
... last value of a sequence use the following query:
SELECT last_value FROM test_id_seq;
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Ruby: Easiest Way to Filter Hash Keys?
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@Andrew, I think you're right. I was on 1.8.7 when I was testing the answer to this question.
– mikej
Sep 15 '11 at 23:22
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Python: Why is functools.partial necessary?
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In the latest versions of Python (>=2.7), you can pickle a partial, but not a lambda:
>>> pickle.dumps(partial(int))
'cfunctools\npartial\np0\n(c__builtin__\nint\np1\ntp2\nRp3\n(g1\n(tNNtp4\nb.'
>>> pickle.dumps(...
I want to delete all bin and obj folders to force all projects to rebuild everything
... course be wise to run whatever command you choose somewhere safe first to test it!
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Why is reading lines from stdin much slower in C++ than Python?
...a look at what happens under the hood, and I've used dtruss/strace on each test.
C++
./a.out < in
Saw 6512403 lines in 8 seconds. Crunch speed: 814050
syscalls sudo dtruss -c ./a.out < in
CALL COUNT
__mac_syscall 1
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How to get instance variables in Python?
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You can also test if an object has a specific variable with:
>>> hi_obj = hi()
>>> hasattr(hi_obj, "some attribute")
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test a file upload using rspec - rails
I want to test a file upload in rails, but am not sure how to do this.
6 Answers
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How to write a Unit Test?
I have a Java class. How can I unit test it?
5 Answers
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Should Gemfile.lock be included in .gitignore?
...r from config/database.yml
(db["production"] || db["development"] || db["test"])["adapter"]
else
"mysql2"
end
gem *db_gems[adapter]
# -----------------------------------------------------------------------------
I can't say if this is an established best practice or not, but it works well for ...
Java String - See if a string contains only numbers and not letters
...ther solutions, because at least require exception handling.
I've run jmh tests and have found that iterating over String using charAt and comparing chars with boundary chars is the fastest way to test if string contains only digits.
JMH testing
Tests compare performance of Character.isDigit vs P...