Cohort Roster

Elixir

Advanced~4h

Your team maintains an internal alert triage service. Each incoming alert carries five severity tags — tokens composed of a level indicator and a category code (e.g. 4S 5H 7C 8D JC). The ranking rules for these tag sets follow standard poker hand rankings.

Elixir

Starter~2h

A legacy industrial robot controller receives a continuous stream of three-character instruction codes. Each triplet maps to a named operation. Your job is to build a decoder that translates individual codes and full instruction streams.

Elixir

Starter~2h

You are cleaning imported contact records before they are saved into a CRM. Each record includes a freeform phone field entered by a human, so the data can contain spaces, dots, parentheses, hyphens, and an optional leading country code of 1.

Elixir

Standard~3h

Calculate the date of scheduled deployment windows. Teams often deploy on the same day of the week each month. In this exercise, you will take a description of a deployment window date and return the actual date.

Elixir

Starter~2h

A maritime signal station transmits messages using a sequence of signal flags. A numeric transmission code determines which flags to raise and in what order.

Elixir

Starter~2h

Implement a HailstoneCascade.steps/1 function that computes how many cascade steps a hailstone particle takes to reach unit mass.