On DataFrame datatype in Ruby
Jan 10, 2016
TL;DR: We need DataFrame as a data structure in Ruby. There are several
promising candidates but no one with good usability. Some considerations
on requirements to
good DataFrame library are proposed, alongside with
some rants on using Ruby for science.
Intro: what is DataFrame and why we should has itz?
As programming languages evolve, our notion of “basic necessary” data
types for high-level language also evolves. So, nowadays in modern languages
we have different kinds of numbers for different tasks; we have arrays
(which are not “just pointers to memory area”); we have strings (which are
Tue May 09 2017 at 1:08:35
Holy mole! The last writeup on this node is almost 12 years old! A lot has happened since.
The
On-Line Encyclopedia of Integer Sequences is an onlinedatabase of (have you guessed it?) sequences of Integers (the set of numbers commonly denoted by ℤ) founded by Neil Sloane.
1
The encyclopedia began in 1964. Sloane was working on his dissertation, when he came across a certain sequence (1, 8, 78, 944…)
2 and was looking for a formula to derive the
n-th number in the sequence. His research at the Cornell University library led him to similar sequences, though not the exact one he was looking for. Since smartphones weren’t around then, Sloane recorded these sequences in file cards sorted lexicographically.
Macworld Mac Pro: Apple system on a chip with 20 or 40 comp.
Mac Pro: Apple system on a chip with 20 or 40 computing cores coming next year
What you need to know about Apple’s high-end desktop computer.
body>The Mac Pro is Apple s workstation. It s designed for professionals who need a powerful and flexible machine, and is ideal for applications that use as many processing cores as possible video-editing applications, image-editing software, 3D programs, and the like.
The Mac Pro is getting a revival of sorts. The company released a brand-new, redesigned Mac Pro in December 2019, after years of stagnation with the previous, cylindrical Mac Pro.