I got to here after spending hours trying to deploy to an Elastic Beanstalk instance via CircleCi 2.0 so I thought I'd write up what worked for me to hopefully help others. Shout out to RobertoSchneiders who's steps for getting it to work with CircleCi 1.0 were my starting point.
For the record, I'm not the most server-savvy of developers so there may be a better way of doing this.
| # Hello, and welcome to makefile basics. | |
| # | |
| # You will learn why `make` is so great, and why, despite its "weird" syntax, | |
| # it is actually a highly expressive, efficient, and powerful way to build | |
| # programs. | |
| # | |
| # Once you're done here, go to | |
| # http://www.gnu.org/software/make/manual/make.html | |
| # to learn SOOOO much more. |
| I have marked with a * those which I think are absolutely essential | |
| Items for each section are sorted by oldest to newest. Come back soon for more! | |
| BASH | |
| * In bash, 'ctrl-r' searches your command history as you type | |
| - Input from the commandline as if it were a file by replacing | |
| 'command < file.in' with 'command <<< "some input text"' | |
| - '^' is a sed-like operator to replace chars from last command | |
| 'ls docs; ^docs^web^' is equal to 'ls web'. The second argument can be empty. | |
| * '!!:n' selects the nth argument of the last command, and '!$' the last arg |
This is a simple way to spot check that the modified image in your git index is the image you actually want without having to leave the command line.
Example: http://i.imgur.com/RUenUcM.png
img-ascii-diff somewhere (e.g. ~/bin/img-ascii-diff).attributes in ~/.config/git/attributes.~/.gitconfig and add the lines below, pointing to wherever you put img-ascii-diff.
(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.
I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!
\
A multi-level groupBy for arrays inspired by D3's nest operator.
Nesting allows elements in an array to be grouped into a hierarchical tree
structure; think of it like the GROUP BY operator in SQL, except you can have
multiple levels of grouping, and the resulting output is a tree rather than a
flat table. The levels in the tree are specified by key functions.
See this fiddle for live demo.
This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.
The script is here:
#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"
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