karlseguin’s gists

karlseguin / no_return.md

Created February 25, 2020 03:36

elixir needs a return statement

This works most of the time

def handle(data) do
	with {:ok, product} <- Jason.decode!(data),
	     {:ok, category} <- Category.load(data.category_id)
	do
		# todo
	end
end

karlseguin / logs.csv

Created October 18, 2019 09:53

1 months worth of probes to an open 80 and 443

karlseguin / gist:c264863573a6bfbf7605

Last active August 29, 2015 14:19

Find article for http://openmymind.net/Golangs-Error-Handling-Good-And-Bad/

	loadArticle (res, req) ->
	article = yield findArticlebyId(...)
	return res.notFound() unless artilce?
	res.ok(article)

	findArticleById (id) ->
	conn = yield conn.Open().
	row = yield conn.QueryAsync("....", id)
	new Article(row)

karlseguin / gist:3fbe1aa749b1e58c485e

Created April 23, 2015 09:26

Find aritcle example for http://openmymind.net/Golangs-Error-Handling-Good-And-Bad/

	func LoadArticle(res http.ResponseWriter, req *http.Request) {
	if article, err := FindArticleById(...)
	if err != nil {
	handleError(res, err)
	return
	}
	if article == nil {
	handleNotFound(res, err)
	}
	}

karlseguin / gist:0ba24030fb12b10b686b

Created March 4, 2015 01:52

bolt vs redis (appendonly on) vs postgresql

	/*
	bolt 5000 277963 ns/op
	redis 30000 48081 ns/op
	pg 10000 149691 ns/op

	Yes, the Bolt transactions could be batched. But so too could the PG transactions,
	and the Redis work could be pipelined. And that isn't always a workable solution.
	*/

	import (

karlseguin / init.coffee

Created February 13, 2015 03:54

Atom editor multiple wrap guides

	# place this in your init.coffee
	atom.workspace.observeTextEditors (e) ->
	editor = atom.views.getView(e)
	clone = editor.querySelector('.wrap-guide').cloneNode()
	clone.style.left = (editor.getDefaultCharacterWidth() * 120) + "px"
	editor.querySelector('.underlayer').appendChild(clone)

karlseguin / gist:a6b441269d82690381e5

Created January 16, 2015 12:37

specialized int set

	/*
	Playing with building a specialized set for integers. Specifically:
	- Integers are natually randomly distributed (auto-incrementing ids for millions of records would do)
	- The number of items is known upfront (can be approximate)
	- The set sizes changes infrequently (we're mostly interested in membership tests)

	Accomodating constraints, to be sure, but if we can meet the first two requirements,
	we'll end up with a little less than 1/2 the memory of a map[int]struct{}, and membership
	tests taking about ~1/2 the time.

karlseguin / gist:5a6a45ace2048545b6c3

Last active August 29, 2015 14:13

UnixBench run on a dedicated i7-4770

	BYTE UNIX Benchmarks (Version 5.1.3)

	System: p2.kapi.io: GNU/Linux
	OS: GNU/Linux -- 3.13.0-36-generic -- #63-Ubuntu SMP Wed Sep 3 21:30:07 UTC 2014
	Machine: x86_64 (x86_64)
	Language: en_US.utf8 (charmap="ANSI_X3.4-1968", collate="ANSI_X3.4-1968")
	CPU 0: Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz (6799.8 bogomips)
	Hyper-Threading, x86-64, MMX, Physical Address Ext, SYSENTER/SYSEXIT, SYSCALL/SYSRET, Intel virtualization
	CPU 1: Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz (6799.8 bogomips)
	Hyper-Threading, x86-64, MMX, Physical Address Ext, SYSENTER/SYSEXIT, SYSCALL/SYSRET, Intel virtualization

karlseguin / gist:a659ef87b3a4a5d590e9

Created January 13, 2015 16:51

UnixBench run on a AWS EC2 c4.2xlarge

	BYTE UNIX Benchmarks (Version 5.1.3)

	System: ip-172-30-0-152: GNU/Linux
	OS: GNU/Linux -- 3.13.0-36-generic -- #63-Ubuntu SMP Wed Sep 3 21:30:07 UTC 2014
	Machine: x86_64 (x86_64)
	Language: en_US.utf8 (charmap="ANSI_X3.4-1968", collate="ANSI_X3.4-1968")
	CPU 0: Intel(R) Xeon(R) CPU E5-2666 v3 @ 2.90GHz (5800.1 bogomips)
	Hyper-Threading, x86-64, MMX, Physical Address Ext, SYSENTER/SYSEXIT, SYSCALL/SYSRET
	CPU 1: Intel(R) Xeon(R) CPU E5-2666 v3 @ 2.90GHz (5800.1 bogomips)
	Hyper-Threading, x86-64, MMX, Physical Address Ext, SYSENTER/SYSEXIT, SYSCALL/SYSRET

karlseguin / gist:0f38b9ad87ebd54375da

Last active August 29, 2015 14:13

UnixBench run on a AWS EC2 c4.8xlarge

	BYTE UNIX Benchmarks (Version 5.1.3)

	System: ip-172-30-0-254: GNU/Linux
	OS: GNU/Linux -- 3.13.0-36-generic -- #63-Ubuntu SMP Wed Sep 3 21:30:07 UTC 2014
	Machine: x86_64 (x86_64)
	Language: en_US.utf8 (charmap="ANSI_X3.4-1968", collate="ANSI_X3.4-1968")
	CPU 0: Intel(R) Xeon(R) CPU E5-2666 v3 @ 2.90GHz (5786.7 bogomips)
	Hyper-Threading, x86-64, MMX, Physical Address Ext, SYSENTER/SYSEXIT, SYSCALL/SYSRET
	CPU 1: Intel(R) Xeon(R) CPU E5-2666 v3 @ 2.90GHz (5786.7 bogomips)
	Hyper-Threading, x86-64, MMX, Physical Address Ext, SYSENTER/SYSEXIT, SYSCALL/SYSRET

Karl Seguin karlseguin