Week 6 sources, conventions and coverage
These notes cover all seven supplied lectures, the matching slides for 6.3 and 6.6, and Tutorial 6.1 with its numbered questions. The PDFs supply teaching content rather than instructions to operate the website. Original score, word and shopping datasets continue throughout the examples.
| Source | Coverage |
|---|---|
| 6.1 | Variable-length nested lists, paragraph/sentence/word levels, hierarchical shopping |
| 6.2 | Insertion by hand, ordered reference views, sorted-query applications |
| 6.3 | SortedListInsert, boundary cases, inserted flag, invariant and descending comparison |
| 6.4 | Sorted duplicate detection, equal-key groups and field-specific comparisons |
| 6.5 | Defining grades and hypotheses, tie boundaries, directional and top-half rules |
| 6.6 | BuildMarksList, pair sorting, exact zero-based grades, nested return unpacking, found and exitloop |
| 6.7 | Train and station cards, cumulative distance, journey days, weekday shifts, direct routes, endpoints and junction clues |
| Tutorial 6.1 | Numbered book insertion, empty-input execution, ≤ tie rule and nested selectors |
The grade explorer reproduces the exact displayed zero-based positional pseudocode. Its whole-run option is a separately specified extension, not a silent repair or a claim to reproduce every spoken hand-adjustment. Hypothesis fractions are descriptive and do not prove independence or causation.
The ten-train teaching subset has 57 visually verified stop rows. It preserves original service identifiers, directions, route distances and weekdays. Arrival and departure days are split explicitly for the 12270 Bhopal midnight stop. The 02245 Friday station/train discrepancy is retained and flagged. Derived station views include only these ten trains; original station cards can contain additional services.
Illustrations are separate images generated in the browser and placed beside their relevant concepts. Small illustrative tables and mini-runs are labelled as such; live score and train traces use the supplied records. Train material is historical course data, and library exercises use the concrete tutorial records rather than an invented 1,000-book table.