Function group check_types

Check the type of a value Function group has those functions and groups:

• Function array? - return true if the argument is an array.
• Function object? - return true if the argument is an object.
• Function null? - return true if the argument is a null.
• Function bool? - return true if the argument is a boolean.
• Function number? - return true if the argument is a number.
• Function string? - return true if the argument is a string.
• Function empty? - return true if the argument is nothing.

Use additional help with a function name to see more details about the function.