FA-96044 / Postal address normalization / Member archive

House number parser: the fraction is duplicated in the street remainder · case 04

A fraction is reported and also left at the start of the street.

Member previewVariant 4 · 3 implementations · 12 checks per implementation

Case contract

Uppercase and split the line. The first token must start with digits: the digits form the house number (an int, which must not be 0); an optional single hyphen is dropped and at most one letter may follow as the suffix. If the second token is a/b with b in 2,3,4 and 0 < a < b it is the fraction and is consumed. Return [number, suffix, fraction, rest] or None.

Why this case matters

House-number parsing decides the delivery point; fractions and suffixes distinguish separate dwellings on one lot.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
half fraction consumed	`[43, "", "1/2", "1/2 FAKE ST"]`	`[43, "", "1/2", "FAKE ST"]`	Failed

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