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Java's L number (long) specification
...ope you won't mind a slight tangent, but thought you may be interested to know that besides F (for float), D (for double), and L (for long), a proposal has been made to add suffixes for byte and short—Y and S respectively. This would eliminate to the need to cast to bytes when using literal syntax...
lexers vs parsers
...TMT_END in your syntax (for the parser) to denote the end of instructions. Now you can have a token with the same name associated with it, generated by the lexer. But you can change the actual lexeme it stands for. Eg. you can define STMT_END as ; to have C/C++-like source code. Or you can define it...
What is a columnar database?
I have been working with warehousing for a while now.
7 Answers
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What is the fastest or most elegant way to compute a set difference using Javascript arrays?
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if don't know if this is most effective, but perhaps the shortest
A = [1, 2, 3, 4];
B = [1, 3, 4, 7];
diff = A.filter(function(x) { return B.indexOf(x) < 0 })
console.log(diff);
Updated to ES6:
A = [1, 2, 3, 4];
B = [1, 3, 4, ...
Activate a virtualenv via fabric as deploy user
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Right now, you can do what I do, which is kludgy but works perfectly well* (this usage assumes you're using virtualenvwrapper -- which you should be -- but you can easily substitute in the rather longer 'source' call you mentioned,...
How can I force WebKit to redraw/repaint to propagate style changes?
...n 2010. It's 2013 and the bug is still around. Thanks. By the way, anyone know if there is any issue registered at webkit tracker?
– RaphaelDDL
Apr 24 '13 at 17:35
13
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Easy way to prevent Heroku idling?
...nothing else, use a cron job to ping your site, and disable the check for known low-use periods (ie, overnight) to ensure Heroku doesn't do away with the free tier for everyone else.
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What is the best method of handling currency/money?
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If you are using Postgres (and since we're in 2017 now) you might want to give their :money column type a try.
add_column :products, :price, :money, default: 0
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How to extract the n-th elements from a list of tuples?
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@Wayne Werner: Yep. This stuff was all just passive knowledge (I don't often use it) - but it's good to be reminded now and then so you know where / what to look for...
– Daren Thomas
Jul 22 '10 at 13:14
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Using javadoc for Python documentation [closed]
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Have a look at the reStructuredText (also known as "reST") format, which is a plaintext/docstring markup format, and probably the most popular in the Python world. And you should certainly look at Sphinx, a tool to generate documentation from reStructuredText (used fo...