racket / racket/htdp

Provide better string operations in *SL

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Dominant language
Racket
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9h 41m
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Description

*SL includes string-lower-case? and string-upper-case?, but no functions for actually downcasing or upcasing strings. OTOH, it includes char-upper-case? and char-upcase, char-lower-case? and char-downcase.

It includes string=? and string-ci=?, and string<? and string-ci<? etc, but then it includes string-contains? but not string-contains-ci?.

This mishmash means that students can't use string-contains-ci? until they've learned about lists and map and characters, and can implement it themselves....

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Research direction

The issue names existing *SL operations such as string-lower-case?, string-upcase?, string-contains?, and their character counterparts, but names no files, tests, or implementation entry point. Start by locating the *SL string primitive definitions and tests; done means the string API consistently supports case conversion and case-insensitive containment for students.

Written by the indexing model from the issue text.

Assessment

Domain
tooling
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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