taynguyen / personal-note Goto Github PK

Ref: exponential

1. brew install postgres

2. To have launchd start postgresql now and restart at login:
   brew services start postgresql
   Or, if you don't want/need a background service you can just run:
   pg_ctl -D /usr/local/var/postgres start

3. Login to PostgreSQL for the first time.
   Press Cmd + T to open a new terminal tab.

whoami is surrounded by backticks, not single quotes.
createdb whoami
Login to PostgreSQL with your user account.

psql

4. Optional: Install AdminPack
   AdminPack is used by PgAdmin. If you plan on using the PgAdmin UI, then installing AdminPack is a good idea.

psql postgres -c 'CREATE EXTENSION "adminpack";'

Link

es6 convert circular object to json.
AWARE: circular reference would be null. You MUST aware that.

objToJsonString(obj) {
    let cache = []
    const jsonText = JSON.stringify(obj, function (key, value) {
      if (typeof value === 'object' && value !== null) {
        if (cache.indexOf(value) !== -1) {
          // Circular reference found, discard key
          return
        }
        // Store value in our collection
        cache.push(value)
      }
      return value
    })
    cache = null // Enable garbage collection

    return jsonText
  }

git pull https://github.com/ORIGINAL_OWNER/ORIGINAL_REPOSITORY.git BRANCH_NAME

Full article: here

https://www.sohamkamani.com/blog/2017/03/31/react-redux-connect-explained/

http://davidcai.github.io/blog/posts/install-multiple-jdk-on-mac/