CODEWITHSUNDEEP
ruby
81-Davis
81-Davis

Reputation: 11

Ruby unexpected |, expecting =

I am trying to create a do block with index. But I keep getting: syntax error, unexpected '|'

This is my code:

def same_char_collapse(str)
  chars = str.split("")

  while chars.each.with_index do | letter, i |
    if letter[i] == letter[i + 1]
      letter[i] = ""
      letter[i +1] = ""
    end
    break
  end
end

The error I am getting:

/tmp/file.rb:5: syntax error, unexpected '|'
...hile chars.each.with_index do | letter, i |
...                              ^
/tmp/file.rb:5: syntax error, unexpected '|', expecting '='
...ach.with_index do | letter, i |
...                              ^

What am I doing wrong?

Upvotes: 1

Views: 48

Answers (1)

Tom Lord
Tom Lord

Reputation: 28285

This line doesn't make sense:

while chars.each.with_index do |letter, i|

I think you just meant to use:

chars.each.with_index do |letter, i|

A while loop, in any language, takes the form: while(conditional) ..... You don't have a conditional here, so it's not a valid use case for while.

On the other hand, methods such as each will:

Call the given block once for each element in self, passing that element as a parameter.

Note: You also could have used chars.each_with_index instead of .each.with_index.

Upvotes: 2

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