rtail | Easily tail a file over ssh | SSH library
kandi X-RAY | rtail Summary
kandi X-RAY | rtail Summary
Easily tail a file over ssh.
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QUESTION
I am studying a course on scala in which I am performing merge sort operation. Here is the code written for that
...ANSWER
Answered 2019-Apr-23 at 15:50It's because here:
QUESTION
I have the following data.frame
below. I would like to create a new column w
(for weight). w
should equal 1 / n for the industries that have the n highest returns for each given date and should equal 0 for the rest of the industries. I can group_by(date)
and use top_n(3, wt = return)
to filter the top industries and then mutate(w = 1/n)
, but how can I mutate
without throwing away the other industries where w
= 0?
ANSWER
Answered 2018-Oct-09 at 01:17We could create a condition with ifelse
. After grouping by 'date', arrange
the dataset based on the 'date', and 'return' in descending order, then create the 'w' by creating the condition that if the row_number()
is less than 'n', then divide 'return' by 'n' or else return 0
QUESTION
I'm working on a Prolog program that will generate a CYK parse table after being given a set of productions. I am stuck on forming Row 1, which creates a cell (list) containing all of the non-terminals that a given terminal can be derived from. Here's what I've got so far:
Here are the productions (upper-case = non-terminal, lower-case = terminal):
...ANSWER
Answered 2018-Feb-27 at 20:38The problem is in the third definition of form/3
: instead of this
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