Interpolate driver coordinates

Interpolate a driver coordinate between timestamped samples with clamped progress and shortest-path longitude wrapping.

MediumJavaScript Product Algorithms

50 min0% acceptance

Description

Interpolate a driver coordinate between timestamped samples with clamped progress and shortest-path longitude wrapping. Implement the learner-facing contract completely and satisfy every observable requirement without relying on hidden infrastructure.

Requirements

Export interpolateDriverCoordinates from src/App.js.
Use the earlier and later timestamp regardless of input order.
Return the nearest endpoint outside the sample interval.
Interpolate latitude linearly by normalized elapsed time.
Interpolate longitude across the shortest dateline path and normalize to minus 180 through 180.
Return an observably equivalent result for equivalent inputs without reading time, randomness, network, storage, or DOM globals.
Do not mutate input objects, arrays, nested records, or values retained in the returned result.

Midpoint

Input

Samples (0,0) at 0 and (10,20) at 10; at is 5

Expected output

Coordinate is latitude 5 longitude 10

Explanation

Use the earlier and later timestamp regardless of input order.

Dateline

Input

Longitude 179 moves to -179

Expected output

The midpoint lies at 180 or -180, not zero

Explanation

Return the nearest endpoint outside the sample interval.

Constraints

Implement a pure synchronous function with no external side effects
Treat every input collection and nested record as read-only
Return JSON-compatible data except where the declared TypeScript API explicitly uses bigint

Hints

Hint 1

Start with the orders-sample-endpoints behavior and make its observable result deterministic.

Hint 2

Model clamps-sample-time independently before combining it with the remaining states.

Hint 3

Verify the boundary described by wraps-longitude without changing caller-owned input.

JavaScriptcoordinatesinterpolation