koji

const num = 1;
const ret = ( '000' + num ).slice( -3 );
console.log(ret);

koji

$ chsh -s /bin/bash # zsh --> bash
$ chsh -s /bin/sh # bash --> zsh

save screenshots in Screenshot folder

$ defaults write com.apple.screencapture location /Users/[your_username]/Screenshots

koji

const fibonacci = n =>
  Array.from({ length: n }).reduce(
    (acc, val, i) => acc.concat(i > 1 ? acc[i - 1] + acc[i - 2] : i),
    []
  );

fibonacci(5);

koji

def factorial(n):
    if n > 1:
        return n * factorial(n-1)
    else:
        return 1

koji

1. Date.getTime() Get the time in milliseconds elapsed since .

2. Date.getFullYear() Get the four-digit year ().

3. Date.getMonth() Get the Date object's month as a zero-indexed number ().

4. Date.getDate()

koji

function solution(A) {
  let result = 0;

  for (let element of A) {
    result ^= element
  }

  return result
}

koji

1. install watchman

$ brew install watchman

2. install jdk

brew tap AdoptOpenJDK/openjdk
brew cask install adoptopenjdk8

koji

$ /usr/local/bin/node -v
v13.7.0

$ sudo rm -rf /usr/local/{bin/{node,npm},lib/node_modules/npm,lib/node,share/man/*/node.*}

$ /usr/local/bin/node -v
zsh: no such file or directory: /usr/local/bin/node

koji

in chrome

$r.store
$r.store.getState()
$r.store.dispatch()

koji

Traceback (most recent call last):
  File "/usr/local/Cellar/pipenv/2018.11.26_2/libexec/bin/pipenv", line 6, in <module>
    from pkg_resources import load_entry_point
  File "/usr/local/Cellar/python/3.7.4/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pkg_resources/__init__.py", line 3241, in <module>
    @_call_aside
  File "/usr/local/Cellar/python/3.7.4/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pkg_resources/__init__.py", line 3225, in _call_aside
    f(*args, **kwargs)
  File "/usr/local/Cellar/python/3.7.4/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pkg_resources/__init__.py", line 3254, in _initialize_master_working_set
    working_set = WorkingSet._build_master()