I/O problem in Ruby [closed] - ruby

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I want to learn about data input with keyboard. Please help me and introduce me some resources.
Thanks.

Have a look at the Readline class.

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Is there a way to apply Mahalanobis and Euclidean algorithms to this code? [closed]

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Excerpts can be found on https://www.kimbalite.com
Screenshot
I've tried applying Kondu's algorithmic formulas, but it's just not working.

Why log is considered as an impure function [closed]

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As i know, pure functions return the value that you insert in. However, log do also the same thing as for example finding sin(x). Why log is considered impure
Read haha some articles

Is ISO8859-15 (Latin-9) a full subselect of UTF-8? [closed]

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I might need to convert an Oracle DB from ISO8859-15 (Latin-9) to UTF-8? So my question is: Is ISO8859-15 (Latin-9) a full subset of UTF-8?
Because than there should be a lower risk of things going wrong.
Any experience here?

Any limit on Nesting of jobs in spring batch [closed]

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I know that nesting of jobs is possible. But i want to know is there any limit on nesting of jobs inside a job?

How does tabling improve efficiency? [closed]

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I am curious about how tabling works to improve efficiency of Prolog programs. How is it implemented? Both explanation and references are welcome.

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