ludic/docs/language/text/text-starts_with.md

id	name	category	kind	tokens	sig	tip	order	ns	member
text-starts_with	Text.starts_with	text	namespace-method	Text.starts_with	Text.starts_with(s, prefix) -> bool	Whether a string begins with a given prefix.	3	Text	starts_with

Returns true when s begins with prefix, comparing byte for byte over the length of the prefix. An empty prefix always matches. Use it to route commands ("/help ..."), recognize a tag, or branch on a filename extension without slicing first.

Parameters:

• s — the string to test
• prefix — the leading substring to look for

program Command {
  let input: string = "/say hello"

  handler Parse phase Update {
    if Text.starts_with(input, "/say ") {
      let msg = Text.slice(input, 5, Text.length(input))
    }
  }
}