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Filtering Pandas DataFrames on dates
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Thank you, will read. The date is a seperate column and not the index in my case. I should have probably given that information in the first place. MY question was not very informative.
– AMM
Apr 6 '14 ...
Definition of “downstream” and “upstream”
...t so you're not tracking divergent lines of development.
Sometimes you'll read about package or release managers (the people, not the tool) talking about submitting changes to "upstream". That usually means they had to adjust the original sources so they could create a package for their system. The...
[ :Unexpected operator in shell programming [duplicate]
...answer. Anyone looking to solve it for sh should just use single '='. Only reading the top voted reply by Wolph wasted my 3 hours :(
– Umer
Feb 8 '19 at 13:40
1
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python max function using 'key' and lambda expression
...thing obvious, like integers.
Meaning of the lambda expression? How to read them? How do they work?
That's sort of a larger question. In simple terms, a lambda is a function you can pass around, and have other pieces of code use it. Take this for example:
def sum(a, b, f):
return (f(a) + ...
Formatting Numbers by padding with leading zeros in SQL Server
...suggest to add again the original numeric value
EDIT Of course I have not read carefully the question above. It says that the field is a char(6) so EmployeeID is not a numeric value. While this answer has still a value per se, it is not the correct answer to the question above.
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Can I Replace Apache with Node.js?
...do fancier things with it—namely real-time notifications. From what I've read, Apache handles this poorly. I'm wondering if I can replace just Apache with Node.js (so instead of " LAMP " it would "LNMP").
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Cleanest way to toggle a boolean variable in Java?
...eanest because they show the intent in the method signature, are easier to read compared to the ! operator, and can be easily debugged.
Usage
boolean bTrue = true
boolean bFalse = false
boolean bNull = null
toggle(bTrue) // == false
toggle(bFalse) // == true
toggle(bNull) // == true
Of course, ...
Count the number occurrences of a character in a string
...er in a string. But if you need to count more characters you would have to read the whole string as many times as characters you want to count.
A better approach for this job would be:
from collections import defaultdict
text = 'Mary had a little lamb'
chars = defaultdict(int)
for char in text:
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Can you have if-then-else logic in SQL? [duplicate]
...mmer and not very into dbs, I think this solution looks the most simple to read and understand :) However, I get multiple result sets since it does more than 1 select. Is there any way to only return 1 resut set? Also, does anyone back up @mson on this being a bad idea?
– Cotte...
How to check if a variable is not null?
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Have a read at this post: http://enterprisejquery.com/2010/10/how-good-c-habits-can-encourage-bad-javascript-habits-part-2/
It has some nice tips for JavaScript in general but one thing it does mention is that you should check for ...