contains (Function)

Checks if a string contains a substring.

Invalid DateTime By

Signature: contains(haystack: string, needle: string) -> bool

Description: Checks if a string contains a substring.

Parameters #

  • haystack (string): The string to search in
  • needle (string): The substring to search for

Returns: Result[bool, Error]

Example #

let found = contains("hello world", "world")
print(found)  // Prints: true