sorting an array w multiple values

[Josselin]

I understand how to sort an array with a single value but how can I
sort an array w multiple values : [ integer_value1, float_value2]

an_array = [ [123, 42.50], [ 245, 25.45], [389, 32.69] ]

wich should give (sorting on the 2nd value)

sorted_array => [[ 245, 25.45],  [389, 32.69], [123, 42.50] ]

thanks for your help

joss

 

[dblack]

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Hi --

I understand how to sort an array with a single value but how can I sort = an=20
array w multiple values : [ integer_value1, float_value2]

an_array =3D [=A0[123, 42.50], [ 245, 25.45], [389, 32.69] ]

wich should give (sorting on the 2nd value)

sorted_array =3D> [[ 245, 25.45], =A0[389, 32.69], [123, 42.50] ]

sorted_array =3D an_array.sort_by {|e| e[1] }


David

--=20
Q. What's a good holiday present for the serious Rails developer?
A. RUBY FOR RAILS by David A. Black (http://www.manning.com/black)
aka The Ruby book for Rails developers!
Q. Where can I get Ruby/Rails on-site training, consulting, coaching?
A. Ruby Power and Light, LLC (http://www.rubypal.com)
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[Uma Geller]

wich should give (sorting on the 2nd value)

sorted_array => [[ 245, 25.45], [389, 32.69], [123, 42.50] ]

would this help ?
http://dev.rubycentral.com/ref/ref_c_array.html#rassoc

best,
UG

 

[Josselin]

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while the remaining parts are likely unreadable without MIME-aware tools.

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Hi --

I understand how to sort an array with a single value but how can I sort = an=20
array w multiple values : [ integer_value1, float_value2]

an_array =3D [=A0[123, 42.50], [ 245, 25.45], [389, 32.69] ]

wich should give (sorting on the 2nd value)

sorted_array =3D> [[ 245, 25.45], =A0[389, 32.69], [123, 42.50] ]

sorted_array =3D an_array.sort_by {|e| e[1] }


David

--=20
Q. What's a good holiday present for the serious Rails developer?
A. RUBY FOR RAILS by David A. Black (http://www.manning.com/black)
aka The Ruby book for Rails developers!
Q. Where can I get Ruby/Rails on-site training, consulting, coaching?
A. Ruby Power and Light, LLC (http://www.rubypal.com)
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thanks a lot , got it... written in my secret notebook.... ;-)))

 

[Josselin]

wich should give (sorting on the 2nd value)

sorted_array => [[ 245, 25.45], [389, 32.69], [123, 42.50] ]

would this help ?
http://dev.rubycentral.com/ref/ref_c_array.html#rassoc

best,
UG

thanks .. got it .. so many things to think..

joos

 

[Josselin]

From: (e-mail address removed) [mailto:[email protected]] On

I understand how to sort an array with a single value but how can I sort an
array w multiple values : [ integer_value1, float_value2]

sorted_array = an_array.sort_by {|e| e[1] }

And if you want to sort by multiple values, in your own chosen order:

sorted_array = an_array.sort_by{ |e| [ e[1], e[0] ] }

thanks got it too... I think I am strating to understand the logic
behind Ruby structure...
so now I'll know where to look for before asking .. ;-))

.... but asking and getting answers help others too....