strings/byte_searches.rb

tests/_examples/strings/byte_searches.rb in the metorex repository.

# `byteindex` and `byterindex` answer where a needle sits, counted in bytes,
# reading from an offset forwards or backwards.
p "blablabla".byteindex "bla"
p "blablabla".byterindex "bla"
p "blablabla".byteindex "bla", 1
p "blablabla".byterindex "bla", 5
p "ありがとう".byteindex "が"
p "ありがとう".byteindex(/が/)
p "blablabla".byteindex "zz"
p "ありがとう".index "が"
p "ありがとう".rindex "が"
p "helloYOU.".byteindex(/\GYOU/, 5)

begin
  "わ".byteindex "", 1
rescue IndexError => problem
  puts problem.message
end

begin
  "abc".byteindex 97
rescue TypeError => problem
  puts problem.message
end

Output:

0
6
3
3
6
6
nil
2
2
5
offset 1 does not land on character boundary
no implicit conversion of Integer into String