Tips from video

[evantianx]

看视频的总结笔记📒

[evantianx]

The Future Of ES6

ES 特性 Maturity Stages

• Strawman
• Proposal
• Draft
• Candidate
• Finished

Cancel Tokens

async function getStockPrice(name, cancelToken) {
  await.cancelToken = cancelToken
  let symbol = await getStockSymbol(name, cancelToken)
  let price = await getSymbolPrice(stmbol, cancelToken)
  return price
}

let { token, cancel } = cancelToken.source()

getStockPrice("Johnson and Johnson", token)
  .then(price => console.log(price))

// 随时终止异步操作
cancel()

Async Generator Functions

async function* getStocks() {
  let reader = new AsyncFileReader('stock.txt')
  try {
    while (!reader.eof) {
      let line = await reader.readline()
      yield JSON.parse(line)
    }
  }
  finally {
    await reader.close()
  }
}

使用示意图:

[evantianx]

10 Tips For Clean Code

• You are responsible for the quality of your code
• Use meaningful names.
• Write code that expresses intent.
• Code should speak for itself. Less comments = less maintenance.
• Leave the code better than you found it.
• Single-responsibility code. i.e function does 1 thing well. Less arguments = better function. classes: most methods use most of the class' properties.
• Tests (TDD).
• Work on big picture skeleton, then fill in the details later (interface first, implementation later).
• Independent components that can be used in different places.
• Master your craft.