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hello:
  world:
    webpack

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{
  "components.App.hello": "hello {name}",
  "components.App.welcome": "Welcome"
}

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async function f() {
 const x = await g()
}

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let name = ‘ゲスト’
try {
 name = awiat getName()
} catch (err) { }
console.log(`ようこそ ${name}さん`)

akameco

let name = ‘ゲスト’
try {
  name = awiat getName()
} catch (err) { }
console.log(`ようこそ ${name}さん`)
// => ようこそ ゲストさん

/// ↓ ↓ ↓

const name = await getName().catch(() => ‘ゲスト’)

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try {
  await f()
} catch (err) {
  handleErr1(err)
}
try {
  await g()
} catch (err) {
  handleErr2(err)
}

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$ mkdir cli-app-demo
$ cd cli-app-demo
$ yarn init -y
$ touch cli.js

akameco

'use strict'
const parse = require('mri') // or require('minimist')

// node cli.js --name tj
const { name } = parse(process.argv.slice(2))

const jsers = {
  tj: ['express', 'koa', 'mocha', 'stylus', 'co'],
  sindersorhus: ['ava', 'chalk', 'xo', 'yaomen'],
  rauchg: ['socket.io', 'next.js'],

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$ node cli.js --name tj
[ 'express', 'koa', 'mocha', 'stylus', 'co' ]

$ chmod +x cli.js
$ cli.js --name kittens
[ 'babel', 'yarn' ]

akameco

$ yarn add mri // or minimist