evmar

#!/bin/bash

# Given a grep expression, create a graph of occurrences of that expression
# in your code's history.

set -e

expr="$1"

datafile=$(mktemp)

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

Aethaeryn

A family tree of major Lisps. (Work in progress.)

--------------------------------------------------------------------------------------------
                                            LISP
--------------------------------------------------------------------------------------------
            MACLISP           |  InterLisp   ||                                ||
-------------------------     |              ||                                ||
  Emacs  | Lisp Machine | ... |     ...      ||             Scheme             ||
         |-----------------------------------||                                ||
         |           Common Lisp             ||                                ||

Kartones

PSQL

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)

developius

Create a new repository, or reuse an existing one.

Generate a new SSH key:

ssh-keygen -t rsa -C "[email protected]"

Copy the contents of the file ~/.ssh/id_rsa.pub to your SSH keys in your GitHub account settings (https://github.com/settings/keys).

Test SSH key:

alerque

[{x:0.4,c:"#373737",t:"#ffffff",g:true,f:1,w:0.5,h:0.6},"\n\n\n\n\n\nEsc",{x:0.09999999999999998,w:0.5,h:0.6},"\n\n\n\n\n\nF1",{x:0.10000000000000009,w:0.5,h:0.6},"\n\n\n\n\n\nF2",{x:0.10000000000000009,w:0.5,h:0.6},"\n\n\n\n\n\nF3",{x:0.09999999999999964,w:0.5,h:0.6},"\n\n\n\n\n\nF4",{x:0.10000000000000009,w:0.5,h:0.6},"\n\n\n\n\n\nF5",{x:0.10000000000000009,w:0.5,h:0.6},"\n\n\n\n\n\nF6",{x:0.09999999999999964,w:0.5,h:0.6},"\n\n\n\n\n\nF7",{x:0.10000000000000053,w:0.5,h:0.6},"\n\n\n\n\n\nF8",{x:6.55,w:0.5,h:0.6},"\n\n\n\n\n\nF9",{x:0.09999999999999964,w:0.5,h:0.6},"\n\n\n\n\n\nF10",{x:0.09999999999999964,w:0.5,h:0.6},"\n\n\n\n\n\nF11",{x:0.10000000000000142,w:0.5,h:0.6},"\n\n\n\n\n\nF12",{x:0.09999999999999964,w:0.5,h:0.6},"\n\n\n\n\n\nSys<br>Req",{x:0.09999999999999964,w:0.5,h:0.6},"\n\n\n\n\n\nScrl<br>Lck",{x:0.10000000000000142,w:0.5,h:0.6},"\n\n\n\n\n\nBreak",{x:0.09999999999999787,w:0.5,h:0.6},"\n\n\n\n\n\nKeypad",{x:0.10000000000000142,w:0.5,h:0.6},"\n\n\n\n\n\nProgram"],
[{y:-0.25,x:2.25,f:3},"{\n5","

burtonsamograd

;; A nock interpreter
(defun tar (a f)
  (labels ((fas (b a)
	     (declare (integer b))
	     (cond
               ((= b 1) a)
               ((= b 2) (car a))
               ((= b 3) (cdr a))
               ((evenp b) (car (fas (/ b 2) a)))
               ((oddp b) (cdr (fas (/ (1- (the integer b)) 2) a))))))

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

agam

;; Step 1: Get the package
(ql:quickload "rutilsx")

;; Step 2: Use it
(use-package :rutilsx)
;; Unfortunately, there is a collision between RUTILS.MISC:VOID and SB-ALIEN:VOID,
;; so select one of the two restarts to continue ...

;; Step 3: Turn on the readtable (for convenient vector/hash literals)
(named-readtables:in-readtable rutilsx-readtable)

djspiewak

Getting Started in Scala

This is my attempt to give Scala newcomers a quick-and-easy rundown to the prerequisite steps they need to a) try Scala, and b) get a standard project up and running on their machine. I'm not going to talk about the language at all; there are plenty of better resources a google search away. This is just focused on the prerequisite tooling and machine setup. I will not be assuming you have any background in JVM languages. So if you're coming from Python, Ruby, JavaScript, Haskell, or anywhere…  I hope to present the information you need without assuming anything.

Disclaimer It has been over a decade since I was new to Scala, and when I was new to Scala, I was coming from a Java and Ruby background. This has probably caused me to unknowingly make some assumptions. Please feel free to call me out in comments/tweets!

One assumption I'm knowingly making is that you're on a Unix-like platform. Sorry, Windows users.

Getting the JVM