Re: [sc-users] Using value from array to select elements in another array

[Daniel Mayer <daniel-mayer@xxxxxxxx>]

Am 31.12.2012 um 06:54 schrieb xiaoping lyu:

> A = 	[14, 2, 9, 1, 11, 8, 12, 4, 4]
> 		            |                      |
> 	B = 	[1,  2,  3, 1,  2, 4,  1,  3, 4]

Hi,

coupling the lists (flop) makes it practical, e.g.


a = [14, 2, 9, 1, 11, 8, 12, 4, 4];
b = [1, 2, 3, 1, 2, 4, 1, 3, 4];

c = [a,b].flop;

c.select { |x| x[1]==3 }.choose.first


You could define a function for that.
A matter of preference if to make the coupling
inside or outside the function.


~myChoose = { |pairs, eqlNum|
	pairs.select { |x| x.last==eqlNum }.choose.first
}


~myChoose.(c, 3)

~myChoose.(c, 5)


Greetings

Daniel



-----------------------------
http://daniel-mayer.at
-----------------------------


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