Returns type of given value or name of function/object.
Returns number of seconds since 1 January 1970 00:00:00 UTC.
Returns a string with the first character of string
capitalized, if that character is alphabetic.
Returns a string with the first character of string
lowercased, if that character is alphabetic.
Returns a camel-cased string. Word boundaries are "-", "_", " "
Returns a pascal-cased string. Word boundaries are "-", "_", " "
Checks whether a file or directory exists
path
must be absolute path
Copy properties from source to destination object
Filters and transforms values
Checks objects or arrays are equal