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#Installing ngrok on OSX

1. Download ngrok
2. Unzip it to your Applications directory
3. Create a symlink (instructions below)

Creating a symlink to ngrok

Run the following two commands in Terminal to create the symlink.

# cd into your local bin directory

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#!/usr/bin/env bash
set -e

# allow being run from somewhere other than the git rootdir
gitroot=$(git rev-parse --show-cdup)

# default gitroot to . if we're already at the rootdir
gitroot=${gitroot:-.};

nm_bin=$gitroot/node_modules/.bin

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yum install -y m2crypto python-setuptools
yum install -y python-pip
pip install shadowsocks
vim /etc/shadowsocks.json
{
"server":"0.0.0.0",
"server_port":8388,
"local_port":1080,
"password":"passwd",
"timeout":600,

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'''
moving avg，就是一个stream输入，
给一个int getNow()API获取当前timestamp，
完成两个函数void record(int value)和double getAvg()，
有输入时会自动call record，然后call getAvg()时返回5分钟内的平均值。 
getMedium -> quick select
'''

from collections import deque

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def summmaryranges(nums):
    ranges = []
    for num in nums:
        if not ranges or num - ranges[-1][-1] > 1:
            ranges.append([])
        ranges[-1][1:] = [num]
    return ['->'.join(map(str, r)) for r in ranges]

def reverse(l, r, cl):
    while l < r:

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The Job Interview Guide 💼

And English is a Work in Progress ⌛

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Callback

function loadScript(src) {
  // creates a <script> tag and append it to the page
  // this causes the script with given src to start loading and run when complete
  let script = document.createElement('script');
  script.src = src;
  document.head.append(script);
}

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System Design interview - Frontend

Sections to cover in the design:

1. General reqs
   Who is the customer?
   How and why they gonna use it?
   Are they all from one country or from all over the world?
   What are they using now to solve the problem?
   How many customers we are expecting with simultanious interactions?

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function skipOne(): Promise<void> {
  return new Promise(((resolve, reject) => {
    setTimeout(resolve, 0)
  }))
}

export class TaskManagerPromise<T> extends Promise<T> {