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Get pandas.read_csv to read empty values as empty string instead of nan
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Documentation for read_csv now offers both na_values (list or dict indexed by columns) and keep_default_na (bool). The keep_default_na value indicates whether pandas' default NA values should be replaced or appended to. The OP's code doesn't work curre...
Create RegExps on the fly using string variables
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Note also that when you use a RegExp in replace(), the replacement string now has a special character too, $. This must also be escaped if you want to have a literal $ in your replacement text!
function escapeSubstitute(s) {
return s.replace(/\$/g, '$$$$');
}
(Four $s because that is itself ...
How to use the “number_to_currency” helper method in the model rather than view?
... a new class for generating your output instead of making your data model know what a CSV is (because it shouldn’t).
As for using helpers for ActiveModel validation errors in the model, well, I’m sorry but ActiveModel/Rails has screwed us all there by forcing error messages to be realized in th...
Is it better to reuse a StringBuilder in a loop?
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Okay, I now understand what's going on, and it does make sense.
I was under the impression that toString just passed the underlying char[] into a String constructor which didn't take a copy. A copy would then be made on the next "wr...
What is the simplest way to convert a Java string from all caps (words separated by underscores) to
...es they need a routine to swap the case of letters. They implement it. You now have ~20 lines to maintain. You would have ~2 if you used the library. And don't forget the unit tests! * The accepted answer has a downside in that the method name does not describe what the code does. A well reused API ...
Return from lambda forEach() in java
... a stream (I am assuming here that it is of type Collection<Player>, now you have a Stream<Player>.
Filter out all unwanted elements with a Predicate<Player>, mapping every player to the boolean true if it is wished to be kept.
Collect the resulting elements in a list, via a Collec...
How to import and use different packages of the same name in Go language?
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import (
"text/template"
htemplate "html/template" // this is now imported as htemplate
)
Read more about it in the spec.
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Differences between socket.io and websockets
... @moka A month ago I would have agreed with you. Socket.io 1.0 is out now and is getting updates.
– Timothy Strimple
Aug 11 '14 at 18:50
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Get cookie by name
... is enclosed with "; " and "=":
"; {name}={value}; {name}={value}; ..."
Now, we can first split by "; {name}=", and if token is found in a cookie string (i.e. we have two elements), we will end up with second element being a string that begins with our cookie value. Then we pull that out from an ...
How to get the full url in Express?
...'X-Forwarded-Protocol') is set and has the value https, in which case you know that's your protocol
The host comes from req.get('host') as Gopal has indicated
Hopefully you don't need a non-standard port in your URLs, but if you did need to know it you'd have it in your application state because it...