What the warning is telling you to do is:
res = if block_given?
yield(array[i], array[i+1])
else
array[i] - array[i+1]
end
That is, having a single assignment instead of two (or even more).
What the warning is telling you to do is:
res = if block_given?
yield(array[i], array[i+1])
else
array[i] - array[i+1]
end
That is, having a single assignment instead of two (or even more).