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Change one value based on another value in pandas
...we are adding a new description column as a concatenation of other columns by using the + operation which is overridden for series. Fancy string formatting, f-strings etc won't work here since the + applies to scalars and not 'primitive' values:
df['description'] = 'A ' + df.age.astype(str) + ' yea...
How do I get the MIN() of two fields in Postgres?
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You can get the answer by putting that data into a column like this:
SELECT name, MIN(score_a, score_b) as minimum_score
FROM table
Here, we are putting the minimum value among score_a and score_b and printing the same by storing that value in a...
Real-world applications of zygohistomorphic prepromorphisms
...he closest thing I've seen with a real world use. Though there are slides by Jevgeni Kabanov using histomorphisms for dynamic programming: cs.ioc.ee/~tarmo/tday-viinistu/kabanov-slides.pdf
– stephen tetley
Feb 21 '11 at 21:00
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Pandoc markdown page break
...o perform this transformation.
Let's assume we are indicating page breaks by putting \newpage in a line surrounded like blank lines, like so:
lorem ipsum
\newpage
more text
The \newpage will be parsed as a RawBlock containing raw TeX. The block will only be included in the output if the target...
@selector() in Swift?
...ton)
The great thing about this approach? A function reference is checked by the Swift compiler, so you can use the #selector expression only with class/method pairs that actually exist and are eligible for use as selectors (see "Selector availability" below). You're also free to make your function...
CSS force image resize and keep aspect ratio
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<p>This image is originally 400x400 pixels, but should get resized by the CSS:</p>
<img width="400" height="400" src="http://i.stack.imgur.com/aEEkn.png">
This will make image shrink if it's too big for specified area (as downside, it will not enlarge image).
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UITextField auto-capitalization type - iPhone App
...e for a UITextField so that the first letter of each word is capitalized by default?
7 Answers
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How to read data when some numbers contain commas as thousand separator?
...is=TRUE instead which would be more general. But letting read.csv() decide by using the default arguments is not helpful because it will convert anything that looks like a character into a factor which causes hassles for the numeric columns as then they don't convert properly using as.numeric().
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node.js hash string?
...sh); // 8ba6c19dc1def5702ff5acbf2aeea5aa
(MD5 is insecure but often used by services like Gravatar.)
The API of these modules won't change!
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Swift variable decorations with “?” (question mark) and “!” (exclamation mark)
... understand that in Swift all variables must be set with a value, and that by using optionals we can set a variable to be set to nil initially.
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