Live Note

Remain optimistic

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The best investment of the decade turned $1 into $90,000

The decade is almost over — and one incredibly volatile investment stood out from all the rest as the best of the 2010s. Want to guess what it was?

Bitcoin

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Posted on Edited on In

e.g.

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let worker = {
  someMethod() {
    return 1
  },

  slow(x) {
    console.log("called with " + x)
    return x * this.someMethod()
  },
}

function decorator(func) {
  const cache = new Map()

  return function (x) {
    if (cache.has(x)) {
      console.log("cache hit")
      return cache.get(x)
    }

    const result = func.call(this, x)
    cache.set(x, result)

    return result
  }
}

worker.slow = decorator(worker.slow)

console.log(worker.slow(2))
console.log(worker.slow(2))

Injection

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function injection(func, ...argsBound) {
  return function (...args) {
    return func.call(this, ...argsBound, ...args)
  }
}

// usage
let user = {
  firstName: "Edward",
  say(time, phrase) {
    console.log(`[${time}]: ${this.firstName} ${phrase}`)
  },
}

user.say = injection(
  user.say,
  new Date().getHours() + ":" + new Date().getMinutes()
)

user.say("Hi")

arrow function

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function defer(f, ms) {
  return function () {
    setTimeout(() => f.apply(this, arguments), ms)
  }
}

function sayHello(name) {
  console.log(`Hi, ${name}`)
}

const deferSay = defer(sayHello, 2000)
deferSay("Edward")

prototype

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let user = {
  name: "Edward",
  hello(name) {
    console.log(`hi ${this.name}, this is ${name}`)
  },
}

Function.prototype.defer = function (ms) {
  let f = this
  return function (...arg) {
    setTimeout(() => f.apply(this, arg), ms)
  }
}

user.hello = user.hello.defer(1000)
user.hello("Ejklfj")

Posted on Edited on In

Delete Service Worker on Safari

To delete a service worker on Safari, you can follow these steps:

  1. Open Safari Developer Console (Press Command + Option + C)
  2. Copy and paste the following JavaScript code into the console:
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navigator.serviceWorker.getRegistrations().then(function (registrations) {
  for (let registration of registrations) {
    registration.unregister().then(function () {
      console.log("Service Worker Unregistered:", registration.scope)
    })
  }
})

This code will:

  1. Get all registered service workers using navigator.serviceWorker.getRegistrations()
  2. Loop through each registration
  3. Unregister each service worker using the unregister() method
  4. Log a confirmation message with the scope of the unregistered service worker

You can verify that the service worker has been successfully removed by:

  1. Opening Safari Developer Tools
  2. Going to the Application tab
  3. Checking the Service Workers section - it should now be empty

Note: After unregistering the service worker, you might need to close all tabs and restart Safari for the changes to take full effect.

Posted on Edited on In

config clash.service

file path: /etc/systemd/system

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[Unit]
Description=Clash service
After=network.target

[Service]
Type=simple
User=edward
ExecStart=/usr/bin/clash -d /home/edward/.config/clash >> /home/edward/.config/clash/clash.log
Restart=on-failure
RestartPreventExitStatus=23

[Install]
WantedBy=multi-user.target
  • start: systemctl start clash
  • stop: systemctl stop clash
  • enable(start when system start): systemctl enable clash
  • disable: systemctl disable clash
  • status: systemctl status clash

Posted on Edited on In

A drawer animation HOC component

Requirements:

  • react-native-reanimated: animation
  • react-native-root-siblings: root sibling
  • Functional component: require hooks

Drawer HOC

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