elemOfStrIn (method)

elemOfStrIn

• elemOfStrIn(this, haystack): boolean

• Checks if the string value inside this Opt is a substring of the given string.

  Parameters

  • this: Opt<string>

  • haystack: string

    The string to search in

  Returns boolean

  true if the value is a substring of the haystack, false otherwise

  Example

  opt('ab').elemOfStrIn('abc') // true
  opt('a').elemOfStrIn('def') // false
  none.elemOfStrIn('abc') // false
  

  See

  • Opt.elemOfIn
  • elemOfStrIn