Array#find!

[Trans]

How to remove the first occurrence of something?

a=[1,2,3,4]
a.find!{ |e| a==2 } #=> 2

But there is no #find!, how to define it? My solutions seem unduly
complex.

Thanks,
T.

 

[7stud --]

How to remove the first occurrence of something?

a=[1,2,3,4]
a.find!{ |e| a==2 } #=> 2

But there is no #find!, how to define it? My solutions seem unduly
complex.

Thanks,
T.

More complex than the following?

arr = [1, 2, 3, 2, 2, 2]

arr.each_with_index do |elmt, i|
if elmt == 2
arr.delete_at(i)
break
end
end

p arr

[1, 3, 2, 2, 2]

 

[Christopher Swasey]

How to remove the first occurrence of something?

a=[1,2,3,4]
a.find!{ |e| a==2 } #=> 2

But there is no #find!, how to define it? My solutions seem unduly
complex.

Thanks,
T.

More complex than the following?

arr = [1, 2, 3, 2, 2, 2]

arr.each_with_index do |elmt, i|
if elmt == 2
arr.delete_at(i)
break
end
end

Why not just...
arr = [1, 2, 2, 2, 3]
arr.delete_at(arr.index(2))

arr => [1, 2, 2, 3]

Christopher

 

[Joel VanderWerf]

arr.each_with_index do |elmt, i|
if elmt == 2
arr.delete_at(i)
break
end
end

If you're going that far, why not just

arr.delete_at(arr.index(2))

(Of course that's limited to #== comparisons. Maybe Array#index should
take a block...)

 

[Andre Nathan]

arr.each_with_index do |elmt, i|
if elmt == 2
arr.delete_at(i)
break
end
end

This won't work in 1.9: "RuntimeError: can't modify array during
iteration".

Best,
Andre

 

[Peña, Botp]

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