Learners, PR Template

Self checklist

• titled PR
• changes meet the requirements of the task
• tested changes
• changes follow the style guide

Changelist

Sprint-2 (Week 8-9): Objects & Testing

Implement:

• contains.js — Check object property existence using 'in' operator
• lookup.js — Create lookup object from key-value pairs with destructuring
• querystring.js — Parse URL query strings (fixed indexOf bug)
• tally.js — Count element frequency with tally pattern

Interpret:

• invert.js — Swap object keys/values (fixed typeof typo and bracket notation)

Stretch:

• count-words.js — Word frequency counter with regex /[^\w\s]/g
• mode.js — Refactored calculateMode into helper functions
• till.js — Calculate total in pounds (fixed parseInt conversion)

Tests:

• 8 test suites, all passing
• 15+ tests in stretch/
• Edge cases: empty inputs, type validation, special characters

Key Learnings:

• typeof returns 7 string literals
• Bracket notation obj[key] vs dot notation obj.key
• Regex for text processing
• Tally pattern: obj[key] = (obj[key] || 0) + 1

Questions

No questions at this time.