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Data · easy

5. Objects

Property access, shorthand, and destructuring.

1 min read3 questionsup to 50 XPtopic 5/50

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AI translates the explanation and quiz text while preserving code and answer scoring.

Objects map string or symbol keys to values. Destructuring allows unpacking properties into local bindings.

js
const tx = { to: "0xabc", value: 1n };
const { to, value } = tx;

How to study this topic

  1. 1. Read the explanation once end to end, skipping the code.
  2. 2. Re-read the code snippets and say out loud what each line does.
  3. 3. Answer the quiz without scrolling back — that is the real check.
  4. 4. Read every explanation, even for the answers you got right.

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Check your understanding

  1. 1. What does `{ ...tx }` produce?

  2. 2. When do you need bracket access?

  3. 3. What does destructuring do?

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