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How can I plot with 2 different y-axes?

... 127 update: Copied material that was on the R wiki at http://rwiki.sciviews.org/doku.php?id=tips:g...
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Why #define TRUE (1==1) in a C boolean macro instead of simply as 1?

... 156 This approach will use the actual boolean type (and resolve to true and false) if the compiler...
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Set every cell in matrix to 0 if that row or column contains a 0

Given a NxN matrix with 0s and 1s. Set every row that contains a 0 to all 0 s and set every column that contains a 0 to all 0 s. ...
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Ruby - elegantly convert variable to an array if not an array already

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How to convert floats to human-readable fractions?

Let's say we have 0.33 , we need to output 1/3 . If we have 0.4 , we need to output 2/5 . 26 Answers ...
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Downloading jQuery UI CSS from Google's CDN

... The Google AJAX Libraries API, which includes jQuery UI (currently v1.10.3), also includes popular themes as per the jQuery UI blog: Google Ajax Libraries API (CDN) Uncompressed: http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/jquery-ui.js Compressed: http://ajax.googleapis.com/ajax/l...
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Is there ever a time where using a database 1:1 relationship makes sense?

...n, and it occurred to me, I cannot think of a time where there should be a 1:1 relationship in a database. 26 Answers ...
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HTTP 1.0 vs 1.1

Could somebody give me a brief overview of the differences between HTTP 1.0 and HTTP 1.1? I've spent some time with both of the RFCs, but haven't been able to pull out a lot of difference between them. Wikipedia says this: ...
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How to round up to the nearest 10 (or 100 or X)?

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Python and pip, list all versions of a package that's available?

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