Strings

Build URL slugs

Turn titles into clean URL slugs, trim them to a length, and make them unique.

Reference

Edit the source, then Run. Checks start after your first Run. Ctrl/⌘ + Enter runs; Tab indents. Preview services use sample data and never contact a real service.

Sourceupstream/strings/slugs.vibe
def slugify(title: string, *, limit: int = 40) -> string
  accents = "àáâäçèéêëìíîïñòóôöùúûü"
  plain = title.downcase.tr(accents, "aaaaceeeeiiiinoooouuuu")
  slug = plain.gsub(/[^a-z0-9]+/, "-").delete_prefix("-").delete_suffix("-")
  return slug if slug.length <= limit
  cut = slug.slice(0, limit)
  cut == nil ? slug : cut.sub(/-[^-]*$/, "")
end

def unique_slugs(titles: array<string>) -> array<string>
  seen: hash<string, int> = {}
  titles.map { |title|
    slug = slugify(title)
    count = seen.fetch(slug, 0) + 1
    seen[slug] = count
    count == 1 ? slug : "#{slug}-#{count}"
  }
end

def run -> { slugs: array<string>, trimmed: string, initials: string }
  titles = [
    "Hello, World!",
    "  Ten Tips for Faster Builds  ",
    "Hello World",
    "Café & Bar Reviews (2024)"
  ]
  words = "vibe script language".split

  {
    slugs: unique_slugs(titles),
    trimmed: slugify("A very long title that runs past the limit", limit: 24),
    initials: words.map { |word| word.chars.fetch(0).upcase }.join
  }
end

Output

Click Run example to see the result.

Code checks

Run once to load the checker. Your code stays in this browser.