69 lines
1.1 KiB
Ruby
69 lines
1.1 KiB
Ruby
# needs refactoring
|
|
def one_edit_away(str1, str2)
|
|
return true if str1 == str2
|
|
str1 = str1.chars
|
|
str2 = str2.chars
|
|
|
|
if str1.length == str2.length
|
|
replace?(str1, str2)
|
|
elsif str1.length == str2.length + 1 || str1.length + 1 == str2.length
|
|
delete?(str1, str2)
|
|
elsif str1.length == str2.length - 1 || str1.length - 1 == str2.length
|
|
add?(str1, str2)
|
|
else
|
|
false
|
|
end
|
|
end
|
|
|
|
def replace?(str1, str2)
|
|
i = 0
|
|
for a, b in str1.zip(str2)
|
|
unless b == a
|
|
str2[i] = a
|
|
if str2.join == str1.join
|
|
return true
|
|
else
|
|
return false
|
|
end
|
|
i += 1
|
|
end
|
|
end
|
|
true
|
|
end
|
|
|
|
def add?(str1, str2)
|
|
i = 0
|
|
j = 0
|
|
while i < str2.length
|
|
if str1[i] != str2[j]
|
|
if i != j
|
|
return false
|
|
else
|
|
i += 1
|
|
end
|
|
else
|
|
i += 1
|
|
j += 1
|
|
end
|
|
true
|
|
end
|
|
end
|
|
|
|
def delete?(str1, str2)
|
|
i = 0
|
|
str2.each_char do |char|
|
|
if i == str1.length
|
|
str2.delete_at(i)
|
|
return true
|
|
elsif char != str1[i]
|
|
str2.delete_at(i)
|
|
if str1 == str2
|
|
return true
|
|
else
|
|
return false
|
|
end
|
|
i += 1
|
|
end
|
|
end
|
|
end
|