What’s the difference between identical(x, y) and isTRUE(all.equal(x, y))?

by

all.equal tests for near equality, while identical is more exact (e.g. it has no tolerance for differences, and it compares storage type). From ?identical:

The function ‘all.equal’ is also
sometimes used to test equality this
way, but was intended for something
different: it allows for small
differences in numeric results.

And one reason you would wrap all.equal in isTRUE is because all.equal will report differences rather than simply return FALSE.

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