Crate yarns

Functions

• concat
  Concatenates two strings.
• contains
  Returns wether a given String contains the given Substring.
• head
  Gets the first char of a string, and returns it as string.
• len
  Returns the length of the utf-8 representation of a string.
• read
  Shortcut for simple binding of user input to an immutable String.
• substr
  Returns a new string starting at the index provided in the second argument, going the length provided as the third argument.