This is a very simple git workflow. It (and variants) is in use by many people. I settled on it after using it very effectively at Athena. GitHub does something similar; Zach Holman mentioned it in this talk.
# docker build -t="rails" . | |
FROM ubuntu:12.04 | |
RUN apt-get update | |
## MYSQL | |
RUN apt-get install -y -q mysql-client libmysqlclient-dev | |
## RUBY |
" copy all this into a vim buffer, save it, then... | |
" source the file by typing :so % | |
" Now the vim buffer acts like a specialized application for mastering vim | |
" There are two queues, Study and Known. Depending how confident you feel | |
" about the item you are currently learning, you can move it down several | |
" positions, all the way to the end of the Study queue, or to the Known | |
" queue. | |
" type ,, (that's comma comma) |
# Idempotent way to build a /etc/hosts file with Ansible using your Ansible hosts inventory for a source. | |
# Will include all hosts the playbook is run on. | |
# Inspired from http://xmeblog.blogspot.com/2013/06/ansible-dynamicaly-update-etchosts.html | |
- name: "Build hosts file" | |
lineinfile: dest=/etc/hosts regexp='.*{{ item }}$' line="{{ hostvars[item].ansible_default_ipv4.address }} {{item}}" state=present | |
when: hostvars[item].ansible_default_ipv4.address is defined | |
with_items: groups['all'] |
##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### ##### | |
### Shell script to download Oracle JDK / JRE / Java binaries from Oracle website using terminal / command / shell prompt using wget. | |
### You can download all the binaries one-shot by just giving the BASE_URL. | |
### Script might be useful if you need Oracle JDK on Amazon EC2 env. | |
### Script is updated for every JDK release. | |
### Features:- | |
# 1. Resumes a broken / interrupted [previous] download, if any. | |
# 2. Renames the file to a proper name with including platform info. |
M[16],X=16,W,k;main(){T(system("stty cbreak") | |
);puts(W&1?"WIN":"LOSE");}K[]={2,3,1};s(f,d,i | |
,j,l,P){for(i=4;i--;)for(j=k=l=0;k<4;)j<4?P=M | |
[w(d,i,j++)],W|=P>>11,l*P&&(f?M[w(d,i,k)]=l<< | |
(l==P):0,k++),l=l?P?l-P?P:0:l:P:(f?M[w(d,i,k) | |
]=l:0,++k,W|=2*!l,l=0);}w(d,i,j){return d?w(d | |
-1,j,3-i):4*i+j;}T(i){for(i=X+rand()%X;M[i%X] | |
*i;i--);i?M[i%X]=2<<rand()%2:0;for(W=i=0;i<4; | |
)s(0,i++);for(i=X,puts("\e[2J\e[H");i--;i%4|| | |
puts(""))printf(M[i]?"%4d|":" |",M[i]);W-2 |
nsinit
provides a handy way to access a shell inside a running container's namespace. This is useful for learning about how containers work, debugging your system without worrying about sshd daemons, and even hot fixes in production all you sad pandas!
:p
Running the docker daemon with the lxc driver allows you to use lxc-attach
to do this. But now that docker deafults to the new native libcontainer driver, nsinit
is probably the best way to go. jpetazzo's blog has a great high level summary.
The new issue is that the libcontainer .json format is under heavy development so you need to keep an nsinit
binary built from the exact release tag from the the docker github repo. The tricky part for me was understanding that golang is designed with certain assumptions about dependencies vs versioning with regards to when you push to master, push to a topic branch, and fork a project.
(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
package main | |
import ( | |
"net/http" | |
"database/sql" | |
"fmt" | |
"log" | |
"os" | |
) |
Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.