Gets a hash code for the Object

Gets a hash code for the Object. This makes it possible to put any Object in a hash table.

The hash code returned must:

1) be consistent, i.e. hashCode(obj) should return the same value on multiple invocations as long as nothing has changed.

2) tell same same thing as equals(), if equals(o1,o2) is TRUE, then hashCode(o1) == hashCode(o2) should also be TRUE.

Note that if equals(o1,o2) is FALSE, hashCode(o1) hashCode(o2) may be either equal or non-equal.

By default, the method returns the internal memory address where the Object is located.

# S3 method for class 'Object'
hashCode(this, ...)

Arguments

...

Not used.

Value

Returns a double.

Author

Henrik Bengtsson

See also

*equals() For more information see Object.

Examples

  obj <- Object()
  hashCode(obj)          # 26979608
#> [1] 1.056196e+14