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1. Parallel Async/Await in real life ex... Parallel Async/Await in real life example

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   const mockUsers = [

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     {

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       id: 1,

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       name: 'Tom',

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       deviceId: 102

2. Sass scope with BEM Sass scope with BEM

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   <div class="card">

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     <div class="card__value">

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       Original

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     </div>

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   </div>

3. Async/Await error handling Async/Await error handling

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   const fetchAndUpdatePosts = () => {

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     fetchPosts()

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       .then((posts) => {

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         updatePosts(posts)

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           .catch((err) => {

4. Promise.all error handling Promise.all error handling

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   const pause = (data, time) => new Promise(resolve => setTimeout(() => resolve(data), time));

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   const pauseReject = (data, time) =>

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     new Promise((resolve, reject) =>

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       setTimeout(() => reject(new Error(`Something went wrong in the ${data} promise`)), time)

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     );