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Node.js · Theory

What does Double Underscore (__) in Front of a Variable in Node.js

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What does Double Underscore (__) in Front of a Variable in Node.js

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Exam tip

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Example

// What does Double Underscore (__) in Front of a Variable in Node.js
const users = [
  { id: 1, name: "Asha" },
  { id: 2, name: "Ravi" },
];

function findUser(id) {
  return users.find((u) => u.id === id) ?? null;
}

console.log(findUser(2));
console.log(users.map((u) => u.name));

What does Double Underscore (__) in Front of a Variable in Node.js: find user 2, then list names. Say both prints.

Short notes

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Questions

1

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Previous← wasi.initialize(instance) Function in Node.jsNextWorking with MQTT in Node.js →
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