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def i *a
puts '---'
a.each { |x| print x.inspect, ',' }
puts
end
x1,(*x2),(x3,*x4) = 1,2,[1,2],[3,4]
i x1,x2,x3,x4
puts '***'
def bar
yield [1,2,3],[4,5], [6]
end
bar { |(a,*b),*y| i a,b,y } # 1, [2,3], [[4,5],[6]]
bar { |(*a),(*b),(*c)| i a,b,c } # [[1,2,3]], [[4,5,]], [[6]]
puts '*** baz ***'
def baz
yield [1,2,3]
end
baz { |a| i a } # [1,2,3]
baz { |a,b| i a,b } # 1,2
baz { |a,b,c| i a,b,c } # 1,2,3
baz { |*a| i a } # [[1,2,3]] (!)
baz { |a,*b| i a,b } # 1, [2,3]
puts '*** foo ***'
def foo
yield 1,2,3
end
foo { |a| i a } # [1,2,3] W
foo { |a,b| i a,b } # 1,2
foo { |a,b,c| i a,b,c } # 1,2,3
foo { |*a| i a } # [1,2,3]
foo { |a,*b| i a,b } # 1, [2,3]
puts '*** goo ***'
def goo
yield *[1,2,3]
end
goo { |a| i a } # [1,2,3] W
goo { |a,b| i a,b } # 1,2
goo { |a,b,c| i a,b,c } # 1,2,3
goo { |*a| i a } # [1,2,3] (!)
goo { |a,*b| i a,b } # 1, [2,3]
puts '********'
x = [1,2,3]
*z = x
i z
*z = *x
i z
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