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JAVASCRIPT TEXT / CHAPTER 03 / Learn / LESSON 09

Text Report.

About 5–10 minutes

Ninth class — capstone. You combine labels and amounts: trim/split, loops, counting, numeric sort on a copy, template literal for a report line.

Idea: clean records, count a category, order amounts without breaking original order, print a short report.

Common mistake: sorting the original array; relying only on hardcoded output without real methods and loops.

Your lesson

Given: rows = ["  food:40  ", "rent:500", "  food:25"]. For each row: trim, split on ":", take category and Number(amount). Count foodCount. Build amounts from the amounts, sorted = [...amounts].sort((a,b)=>a-b). Print foodCount, sorted[0], sorted[sorted.length-1], and `food rows: ${foodCount}`. Expected: 2, 25, 500, food rows: 2.

Do not sort the original amounts — use a copy.

lesson_09.jsJAVASCRIPT

Loading the runtime… The first launch may take a little longer.

… 0/20000

STANDBY

budget-data.logIDLE

> waiting for arrays / objects…
> report: —
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Code Lab

DATA STANDBY

01trim and split

02count + copy/sort

03console matches

ConsoleWrite the code. Bring it online.

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