| m1 = Matrix([[1,1],[2,2]]) | |
| # | |
| print m1 | |
| #result: | |
| # | |
| #| 1 1 | | |
| #| 2 2 | | |
| m2 = Matrix([[1,1],[1,1]]) |
| package main | |
| import "fmt" | |
| func main() { | |
| var n int | |
| fmt.Scan(&n) | |
| for i := 1; i <= n; i++ { | |
| for j := 0; j < n-i; j++ { |
Getting started:
Related tutorials:
#MongoDB 3.2.x Replica Sets on AWS EC2 A MongoDB replica set provides a mechanism to allow for a reliable database services. The basic replica set consists of three servers, a primary, a secondary and an arbitrator. The primary and secondary both hold a copy of the data. The arbitrator is normally a low spec server which just monitors the other servers and help with the failover process. In production, there can be more than three servers.
To setup mongo as a replica set on Amazon Web Services EC2 you need to first setup a security group with ssh on port 22 and mongodb on port 27017. You then need to create three servers. Select Ubuntu 14.04 LTS x64 and a micro (or bigger depending on your database size, ideally you should have enough memory to match your database size) instance for the primary and secondary and a nano instance for the arbitrator.
##Adjust the File System on each Server The operating system by default will update the last access time on a file. In a high data throughput database application
using mocha/chai/sinon for node.js unit-tests? check out my utility: mocha-stirrer to easily reuse test components and mock require dependencies
