FA-96207 / Postal address normalization / Member archive

Block range side assignment: parity is not used to pick the side · case 02

Even house 152 is placed on the odd left side.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

Input [house, segment] where the segment maps "left"/"right" to [from, to] house ranges (either direction, both ends sharing parity). Check left, then right: a side matches when the house lies between the ends inclusive and has the parity of "from". Return [side, position] with position the reduced fraction (house - from) / (to - from) as a string, "0" for a single-address range, or None when no side matches.

Why this case matters

Assigning a normalized address to the correct block face and position drives geocoding and carrier walk order.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
even house on even right side	`["left", "53/98"]`	`["right", "27/49"]`	Failed

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