Ruby

  • For compare two array
arr1 = [1, 2, 3, 4, 5]
arr2 = [5, 6, 7, 8, 9]
arr3 = [10, 11, 12, 13, 14]

(arr1 & arr2).empty? # => false
(arr1 & arr3).empty? # => true

Ruby on Rails

PosgreSQL

  • Import data
  $ psql -U postgres_user -d database_name -a -f data.sql

MeteorJS

  • Cross Origin Cors, add this code in server directory
WebApp.connectHandlers.use(function(req, res, next) {
  res.setHeader("Access-Control-Allow-Origin", "*");
  return next();
});

GO

Atom.io

AngularJS

MySQL

# To export to file (data only)
mysqldump -u [user] -p[pass] --no-create-info mydb > mydb.sql

# To export to file (structure only)
mysqldump -u [user] -p[pass] --no-data mydb > mydb.sql

# To import to database
mysql -u [user] -p[pass] mydb < mydb.sql