Duplicate a floating point number with Ruby in Sketchup

Question

Is it possible to duplicate a float number array as a variable to a new variable in ruby with sketchup? I have tried both .clone and .dup, but no luck (see below).

a = [1.1,2.2,3.3]
b = [a.dup,a.dup,a.dup] #Returns "TypeError: can't dup Float"
b = [a.clone,a.clone,a.clone] #Returns "TypeError: can't clone Float"

Any other ways of duplicating an arrayed variable containing floats in ruby with sketchup?

EDIT: This is what I am trying to do:

a = [1.1,2.2,3.3]
x = [4.4,5.5,6.6]
b = [a,x]
b[0][1] += 1.1
b[1][1] += 1.1

so that a == [1.1,2.2,3.3], x == [4.4,5.5,6.6] and b == [[1.1,3.3,3.3],[4.4,6.6,6.6]]

I now realise that both .clone and .dup work in Ruby itself (Thanks to Amadan and Sami Kuhmonen)

Just assign it. They’re integral types, they can’t be cloned. — Sami Kuhmonen, Oct 30 '19 at 04:06
Not for 1001 times, I'm not...any other ways or is that literally the only way to do it? — Poyda, Oct 30 '19 at 04:10
Why would you need another way to do it than simple assignment? — Sami Kuhmonen, Oct 30 '19 at 04:11
With Ruby, if ```b = a``` I go ```b += 1``` we have a problem, because ```b == 2.1``` **and** ```a == 2.1``` — Poyda, Oct 30 '19 at 04:16
@Poyda: That's not how primitive types work. Try it yourself. — Amadan, Oct 30 '19 at 04:19
@SamiKuhmonen & Amadan: Thanks for pointing that out. See updated question. — Poyda, Oct 30 '19 at 04:24
@SamiKuhmonen: What do you mean by “They’re integral types”? — Eric Postpischil, Oct 30 '19 at 06:57

Amadan · Accepted Answer · 2019-10-30T05:48:58.910

0

I can't see what your updated question has to do with the original one, but here's two ways to do what you wanted:

b = [a.dup, b.dup]
b[0][1] += 1.1
b[1][1] += 1.1

or

b.map! { |r| r.dup.tap { |r2| r2[1] += 1.1 } }

edited Oct 30 '19 at 05:48

answered Oct 30 '19 at 05:22

Amadan

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sorry, I didn't explain myself very well. This now messes with the x and a values, and I don't want it to do that. – Poyda Oct 30 '19 at 05:45
Ah, I didn't notice `a` and `x` were unchanged. Will change in a sec. – Amadan Oct 30 '19 at 05:46
Just to let you know I was using Ruby in Sketchup. Should I close this question because it *does* work in Ruby, or edit it? – Poyda Oct 30 '19 at 05:56
The second option works in Sketchup, however in both Ruby and Sketchup Ruby, I have the result ```3.3000000000000003``` if one of the values is ```3.3```? – Poyda Oct 31 '19 at 03:14
Yep, not Ruby's fault: check out [Is floating point math broken?](https://stackoverflow.com/questions/588004/is-floating-point-math-broken). In Ruby you can use [other datatypes](https://ruby-doc.org/core-2.5.0/Rational.html) to overcome it; for example, `(1.1r + 2.2r).to_f` will give you `3.3`. – Amadan Oct 31 '19 at 03:19
as in change over the floats to rationals, then back again...right, thanks for that – Poyda Nov 04 '19 at 00:16

Duplicate a floating point number with Ruby in Sketchup

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