Rs
All modules
05
Intermediate · 3 submodules · 8 lessons · 2h 42m

Collections & the Standard Library

Vec, HashMap, BTreeMap, iterators, and std tools — daily drivers for series, portfolios, and books.

Submodule 5.1

Vectors & Iterators

Dynamic arrays and iterator pipelines.

  1. 1

    Vec Basics

    Growable arrays: push, indexing, capacity, and ownership.

    20 min
  2. 2

    Iterators: map, filter, collect

    Transform price series without manual index soup.

    22 min
  3. 3

    windows & Log Returns

    Pair consecutive prices into returns with windows(2).

    22 min

Submodule 5.2

HashMap & BTreeMap

Portfolios and ordered books.

  1. 1

    HashMap Portfolios

    Aggregate fills into net positions by ticker.

    20 min
  2. 2

    BTreeMap Order Levels

    Sorted price levels for a toy limit book.

    20 min
  3. 3

    std Math & Formatting

    f64 methods and format! for reports and d1.

    18 min

Submodule 5.3

Collections Lab

End-to-end stats pipeline.

  1. 1

    Pipeline Lab: Prices to Stats

    prices → returns → mean/std → annualized vol.

    25 min
  2. 2

    Module 4 Review Checklist

    Counters with HashMap and self-check.

    15 min