deepak

# rails config needs `force_ssl`
# example:
# Force all access to the app over SSL, use Strict-Transport-Security,
# and use secure cookies.
# config.force_ssl = true
# and rails needs some headers to be set, otherwise will be trapped in a redirect loop
# nginx config for headers:
# proxy_set_header X-Real-IP       $remote_addr;
# proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
# proxy_set_header X-Forwarded-Proto https;

deepak

git commit
/usr/local/opt/rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/overcommit-0.32.0/lib/overcommit/git_version.rb:12: warning: Insecure world writable dir /usr in PATH, mode 040777
Running pre-commit hooks
Check for trailing whitespace....................[TrailingWhitespace] OK

✓ All pre-commit hooks passed

/usr/local/opt/rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/overcommit-0.32.0/lib/overcommit/git_version.rb:12: warning: Insecure world writable dir /usr in PATH, mode 040777
Running commit-msg hooks
Check subject line................................[SingleLineSubject] OK

deepak

• add overcommit. to catch things like, long commit messages

  echo "2.3.0" > .ruby-version gem install overcommit overcommit --install overcommit --sign run overcommit --list (to see list of hooks) run overcommit --run (to test it out once)

some interesting hooks to try out, but not enabled:

deepak

# http://apple.stackexchange.com/questions/20547/how-do-i-find-my-ip-address-from-the-command-line
alias ip="dig +short myip.opendns.com @resolver1.opendns.com"
alias localip="ipconfig getifaddr en0"

deepak

#!/usr/bin/env node --trace-sync-io

// curl command to test:
// curl --insecure -X GET -v https://localhost:3000/
// something similar in node using the https module

// works with:
// strictSSL: false, // allow us to use our self-signed cert for testing
// rejectUnauthorized: false
// no need to add

deepak

# let us say you want to check if a host is reachable
# sometimes you need to be behind a private VPN or the host is just down
# and you want to do this on your local-machine and on Heroku
 
# can open your terminal and use ping on your local

# And can get a bash shell on Heroku as well - by `heroku run bash`
# but there is no `ping` binary there

#  ```bash

deepak

"use strict";
const fs = require('fs'),
      spawn = require('child_process').spawn,
      fileName = process.argv[2],
      spawnCmd = process.argv[3],
      spawnArgs = process.argv.slice(4, process.argv.length);

console.log([typeof spawnArgs, spawnArgs]);

if (!fileName) {

deepak

const fs = require('fs'),
      fileName = process.argv[2];

if (!fileName) {
    throw Error("need to specify file to watch!");
}

fs.watch(fileName, function() {
    console.log("file '"+ fileName + "' just changed");
});

deepak

https://docs.oracle.com/javase/tutorial/java/generics/inheritance.html

interface PayloadList<E,P> extends List<E> {
    void setPayload(int index, P val);
}

class NewList implements PayloadList<Integer, String> {
  //...implement interface methods..
}

deepak

# http://stackoverflow.com/questions/11462430/can-i-detect-that-a-method-has-been-overridden

module Ponger
  def pong
    "ping"
  end
end

class HealthCheck
  include Ponger