Truncate string when it is too long

Question

I have two strings:

short_string = \"hello world\"
long_string = \"this is a very long long long .... string\" # suppose more than 10000 chars

Answer 1

Truncate naturally

I want to propose a solution that truncates naturally. I fell in love with the String#truncate method offered by Ruby on Rails. It was already mentioned by @Oto Brglez above. Unfortunately I couldn't rewrite it for pure ruby. So I wrote this function.

def truncate(content, max)    
    if content.length > max
        truncated = ""
        collector = ""
        content = content.split(" ")
        content.each do |word|
            word = word + " " 
            collector << word
            truncated << word if collector.length < max
        end
        truncated = truncated.strip.chomp(",").concat("...")
    else
        truncated = content
    end
    return truncated
end

Example

• Test: I am a sample phrase to show the result of this function.
• NOT: I am a sample phrase to show the result of th...
• BUT: I am a sample phrase to show the result of...

Note: I'm open for improvements because I'm convinced that there is a shorter solution possible.