kconner

macOS Internals

Understand your Mac and iPhone more deeply by tracing the evolution of Mac OS X from prelease to Swift. John Siracusa delivers the details.

Starting Points

How to use this gist

You've got two main options:

gene1wood

Python relative imports in AWS Lambda fail with attempted relative import with no known parent package

The Problem

In AWS Lambda if I attempt an explicit relative import like this

.
├── lambda_file.py
└── example.py

AngerM

package utils

import (
	"context"
	"io"
	"io/ioutil"
	"net"
	"net/http"
	"strings"
	"time"

iosecure

iOS, The Future Of macOS, Freedom, Security And Privacy In An Increasingly Hostile Global Environment

This post by a security researcher who prefers to remain anonymous will elucidate concerns about certain problematic decisions Apple has made and caution about future decisions made in the name of “security” while potentially hiding questionable motives. The content of this article represents only the opinion of the researcher. The researcher apologises if any content is seen to be inaccurate, and is open to comments or questions through PGP-encrypted mail.

TL;DR

rondy

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

---

Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?

kennwhite

$ dig calendar.google.com @208.67.222.222

; <<>> DiG 9.8.3-P1 <<>> calendar.google.com @208.67.222.222
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19048
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;calendar.google.com.		IN	A

cy-park

Zip excluding specific directories

Exclude .git file and node_modules directory

$ zip -r9 [target_file] [source_file] -x *.git* node_modules/\*

Exclude .git file and files in node_modules directory, but keep node_modules directory

$ zip -r9 [target_file] [source_file] -x *.git* node_modules/**\*

bernardo-cs

Pry.config.editor = "vim --noplugin"

if defined?(PryByebug)
  Pry.commands.alias_command 'c', 'continue'
  Pry.commands.alias_command 's', 'step'
  Pry.commands.alias_command 'n', 'next'
  Pry.commands.alias_command 'f', 'finish'
  Pry.commands.alias_command 'b', 'break'
  Pry.commands.alias_command 'bda', 'break --disable-all'
end

robinsloan

require "rubygems"
require "twitter"
require "json"

# things you must configure
TWITTER_USER = "your_username"
MAX_AGE_IN_DAYS = 1 # anything older than this is deleted

# get these from dev.twitter.com
CONSUMER_KEY = "your_consumer_key"

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD