ryansobol

What's a Hash and why is it important?

A Hash is a collection of key-value pairs. To add, fetch, modify, and delete a value from a Hash, you refer to it with a unique key.

While an Array is indexed by Integers only, a Hash is keyed by any object -- Strings, Integers, etc.

In other programming languages, a Hash might be known as an 'associative array', 'dictionary', or 'HashMap'.

What does a Hash look like?

ryansobol

What's a Symbol and why is it imporant?

In Ruby, a Symbol is the most efficient way, in terms of time and memory, to represent a set of characters.

What does a Symbol look like?

Most commonly, a Symbol is a single word prefixed by a colon:

:hello

Kartones

PSQL Cheatsheet

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

natelandau

#  ---------------------------------------------------------------------------
#
#  Description:  This file holds all my BASH configurations and aliases
#
#  Sections:
#  1.   Environment Configuration
#  2.   Make Terminal Better (remapping defaults and adding functionality)
#  3.   File and Folder Management
#  4.   Searching
#  5.   Process Management

tadast

# 1) Create your private key (any password will do, we remove it below)

$ cd ~/.ssh
$ openssl genrsa -des3 -out server.orig.key 2048


# 2) Remove the password

$ openssl rsa -in server.orig.key -out server.key

mattbrictson

<%= render("shared/navbar") %>

<div class="container">

  <%= render("shared/alerts") %>
  <%= render("shared/page_header") %>

  <%= yield %>

  <%= render("shared/footer") %>

basmussen

#!/bin/bash

host=http://localhost:8080
url=/pluginManager/installNecessaryPlugins

# git plugin https://wiki.jenkins-ci.org/display/JENKINS/Git+Plugin
curl -X POST -d '<jenkins><install plugin="git@2.0" /></jenkins>' --header 'Content-Type: text/xml' $host$url

# artifactory plugin https://wiki.jenkins-ci.org/display/JENKINS/Artifactory+Plugin
curl -X POST -d '<jenkins><install plugin="artifactory@2.2.1" /></jenkins>' --header 'Content-Type: text/xml' $host$url

congjf

Using MongoDB in golang with mgo

clarkdave

##
# This provides `create_enum` and `drop_enum` methods for migrations, which creates
# a Postgres ENUM type with the provided values.
#
# It'll also dump these into the schema.rb to be loaded into another DB (e.g. rake db:test:load)
#
# In order to reference the new enums as actual types, ActiveRecord needs to know about them, so
# make sure they are all represented in the `types` array below
#
# Then you can reference them in your migrations, e.g.

johnjohndoe

#!/bin/sh
#
# An example hook script to verify what is about to be committed.
# Called by "git commit" with no arguments.  The hook should
# exit with non-zero status after issuing an appropriate message if
# it wants to stop the commit.
#
# Usage:
# Remove the .sh file extension when you put the script in your hooks folder!
#