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Cleaning `Inf` values from an R dataframe
...%
mutate_if(is.numeric, list(~na_if(., -Inf)))
This works well, but a word of warning is not to swap in abs(.) here to do both lines at once as is proposed in an upvoted comment. It will look like it works, but changes all negative values in the dataset to positive! You can confirm with this:...
Stripping everything but alphanumeric chars from a string in Python
... it would speed up the substitution as the replace will get rid of all non-word characters in a block in one go, rather than removing them one-by-one.
– DrAl
Aug 14 '09 at 9:07
2
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What exactly is an HTTP Entity?
...se 3. You've got a 304 Not Modified. No entity has been transferred.
In a word, Entity is an optional payload inside an http message(either request or response), so it is a "part-whole" relation between Entity and Message.
Some header fields apply to Message like Transfer-Encoding describe how to ...
Is it possible to use JS to open an HTML select to show its option list? [duplicate]
...hnically impossible because of some obscure technical limitation? In other words, just, why?
– Mattias Martens
Oct 7 '19 at 6:13
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Javascript: negative lookbehind equivalent?
...he goal is to match a double-l but not if it is preceded by "ba". Note the word "balll" -- true lookbehind should have suppressed the first 2 l's but matched the 2nd pair. But by matching the first 2 l's and then ignoring that match as a false positive, the regexp engine proceeds from the end of tha...
Can a CSV file have a comment?
...y Excel. You should ask yourself how does Excel define a comment? In other words, what would make Excel ignore a line (or part of a line) in the CSV file? I'm not aware of anything which would do this.
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Should enums in C# have their own file? [closed]
... @KarlMorrison Please, that comment is 5 years old. Anyway, I added the word "mostly" for a reason. Enums have a relation to more than just classes, like namespaces too. If I had an AnchorStyle enum used throughout a UI library, I'd typically also have a UI sub namespace and corresponding folder....
How to get a key in a JavaScript object by its value?
... 42,
key2: 'foo'
};
test.getKeyByValue( 42 ); // returns 'key1'
One word of caution: Even if the above works, its generally a bad idea to extend any host or native object's .prototype. I did it here because it fits the issue very well. Anyway, you should probably use this function outside the...
Regular Expressions and negating a whole character group [duplicate]
...k of Lorem Ipsum text, counting the number of lines that don't contain the word "quo". These are the regexes I used:
(?m)^(?!.*\bquo\b).+$
(?m)^(?:(?!\bquo\b).)+$
Whether I search for matches in the whole text, or break it up into lines and match them individually, the anchored lookahead consis...
Copy and paste content from one file to another file in vi
...eparate Vim windows or between Vim and PC applications (Notepad, Microsoft Word, etc.).
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