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Is there a difference between “raise exception()” and “raise exception” without parenthesis?
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3 Answers
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SQLite table constraint - unique on multiple columns
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348
Put the UNIQUE declaration within the column definition section; working example:
CREATE TABL...
How to properly compare two Integers in Java?
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312
No, == between Integer, Long etc will check for reference equality - i.e.
Integer x = ...;
In...
Merge and interleave two arrays in Ruby
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DigitalRossDigitalRoss
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Counting the occurrences / frequency of array elements
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How to drop multiple columns in postgresql
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longlong
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Color in git-log
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As of git 1.8.3 (May 24, 2013), you can use %C(auto) to decorate %d in the format string of git log.
From the release notes:
* "git log --format" specifier learned %C(auto) token that tells Git
to use color when interpolating %d (dec...
Why are hexadecimal numbers prefixed with 0x?
...ramming number systems were decimal and octal — mainframes had 12, 24 or 36 bits per byte, which is nicely divisible by 3 = log2(8).
The BCPL language used the syntax 8 1234 for octal numbers. When Ken Thompson created B from BCPL, he used the 0 prefix instead. This is great because
an integer ...
What are the most common non-BMP Unicode characters in actual use? [closed]
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Android Studio inline compiler showing red errors, but compilation with gradle works fine
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132
The following steps helps
Close your project, and in your project folder delete project/.ide...