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When comparing two Indexables (Indexable#==) it is safe to access
other's value through unsafe_at as its size has already been checked.
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karlseguin authored and asterite committed Feb 20, 2017
1 parent 2bc0030 commit 44c859f
Showing 1 changed file with 9 additions and 0 deletions.
9 changes: 9 additions & 0 deletions src/indexable.cr
Expand Up @@ -211,6 +211,15 @@ module Indexable(T)
size == 0
end

# Optimized version of `equals?` used when `other` is also an `Indexable`.
def equals?(other : Indexable)
return false if size != other.size
each_with_index do |item, i|
return false unless yield(item, other.unsafe_at(i))
end
true
end

# Determines if `self` equals *other* according to a comparison
# done by the given block.
#
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