Equality and identity

As in most language, one can distinguish between physical equality and logical equality.

Atomics can only be compared logically. Their physically identity is totally opaque to you.

Example 183. Logical comparison of two atomics

1 eq 1
    

Result (run with Zorba): true


Example 184. Logical comparison of two atomics

1 eq 2
    

Result (run with Zorba): false


Example 185. Logical comparison of two atomics

"foo" eq "bar"
    

Result (run with Zorba): false


Example 186. Logical comparison of two atomics

"foo" ne "bar"
    

Result (run with Zorba): true


Two objects or arrays can be tested for logical equality as well, using deep-equal(), which performs a recursive comparison.

Example 187. Logical comparison of two JSON items

deep-equal({ "foo" : "bar" }, { "foo" : "bar" })
    

Result (run with Zorba): true


Example 188. Logical comparison of two JSON items

deep-equal({ "foo" : "bar" }, { "bar" : "foo" })
    

Result (run with Zorba): false


The physical identity of objects and arrays is not exposed to the user in the core JSONiq language itself. Some library modules might be able to reveal it, though.