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Peter Marreck pmarreck

38 followers · 25 following
  • formerly desk.com, thredup.com and lifebooker.com. currently Director of Engineering @addigence
  • Long Island, NY
  • 04:00 (UTC -04:00)
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@ryanb
ryanb / issues_with_modules.md
Created November 29, 2012 22:38
Points on how modules can make code difficult to read.

My issues with Modules

In researching topics for RailsCasts I often read code in Rails and other gems. This is a great exercise to do. Not only will you pick up some coding tips, but it can help you better understand what makes code readable.

A common practice to organize code in gems is to divide it into modules. When this is done extensively I find it becomes very difficult to read. Before I explain further, a quick detour on instance_eval.

You can find instance_eval used in many DSLs: from routes to state machines. Here's an example from Thinking Sphinx.

class Article < ActiveRecord::Base
@havenwood
havenwood / clippy.rb
Last active December 14, 2015 15:08
Send puts output to OS X clipboard inside a block
def clipboard
yield
pbcopy = IO.popen 'pbcopy', 'w'
$stdout = pbcopy
yield
ensure
pbcopy.close
$stdout = STDOUT
end
@quchen
quchen / trolling_haskell
Last active February 24, 2024 01:30
Trolling #haskell
13:15 <xQuasar> | HASKELL IS FOR FUCKIN FAGGOTS. YOU'RE ALL A BUNCH OF
| FUCKIN PUSSIES
13:15 <xQuasar> | JAVASCRIPT FOR LIFE FAGS
13:16 <luite> | hello
13:16 <ChongLi> | somebody has a mental illness!
13:16 <merijn> | Wow...I suddenly see the error of my ways and feel
| compelled to write Node.js!
13:16 <genisage> | hi
13:16 <luite> | you might be pleased to learn that you can compile
| haskell to javascript now
@mbbx6spp
mbbx6spp / gist:5622645
Last active December 17, 2015 14:09
Add this to your .bash_profile to handle history properly across multiple terminals, and output exit code of last command plus suitable fortune in appropriate color.
declare -r red=$'\e[31;40m'
declare -r blue=$'\e[0;34m'
declare -r d=$'\e[37;40m' # set this to what makes sense for your terminal color scheme
shopt -s histappend
pre_prompt() {
local exit_code=$?;
history -a;
history -n;
@mbbx6spp
mbbx6spp / gist:6216218
Created August 12, 2013 23:09
$ whois microsoft.com
Whois Server Version 2.0
Domain names in the .com and .net domains can now be registered
with many different competing registrars. Go to http://www.internic.net
for detailed information.
MICROSOFT.COM.ZZZZZZZZZZZZZZZZZZZZZZ.IS.A.GREAT.COMPANY.ITREBAL.COM
MICROSOFT.COM.ZZZZZZZZZZZZZZZZZZZ.GET.ONE.MILLION.DOLLARS.AT.WWW.UNIMUNDI.COM
MICROSOFT.COM.ZZZZZZZZZZZZZZZZZZ.IM.ELITE.WANNABE.TOO.WWW.PLUS613.NET
@rxaviers
rxaviers / gist:7360908
Last active May 24, 2024 07:00
Complete list of github markdown emoji markup

People

:bowtie: :bowtie: 😄 :smile: 😆 :laughing:
😊 :blush: 😃 :smiley: ☺️ :relaxed:
😏 :smirk: 😍 :heart_eyes: 😘 :kissing_heart:
😚 :kissing_closed_eyes: 😳 :flushed: 😌 :relieved:
😆 :satisfied: 😁 :grin: 😉 :wink:
😜 :stuck_out_tongue_winking_eye: 😝 :stuck_out_tongue_closed_eyes: 😀 :grinning:
😗 :kissing: 😙 :kissing_smiling_eyes: 😛 :stuck_out_tongue:
@jgaskins
jgaskins / numeric_vs_uuid
Created January 17, 2014 01:38
Comparing numeric vs UUID in Postgres. Rehearsal benchmarks are thrown out. Only the second run is kept. Insertions are done all in one query to minimize the impact of I/O. This is harder to do with retrieval, but the ids are randomized in each one to minimize the effects of caching inside the database.
Inserting
user system total real
Numeric 0.070000 0.010000 0.080000 ( 0.586738)
UUID 0.070000 0.020000 0.090000 ( 3.101085)
Retrieving by id
user system total real
Numeric 0.810000 0.980000 1.790000 ( 6.831551)
UUID 0.830000 0.990000 1.820000 ( 6.981944)
@gitaarik
gitaarik / git_submodules.md
Last active May 24, 2024 07:10
Git Submodules basic explanation

Git Submodules basic explanation

Why submodules?

In Git you can add a submodule to a repository. This is basically a repository embedded in your main repository. This can be very useful. A couple of usecases of submodules:

  • Separate big codebases into multiple repositories.
@bitemyapp
bitemyapp / gist:8739525
Last active May 7, 2021 23:22
Learning Haskell
@timruffles
timruffles / dyanmic_or_di_elixir.md
Last active June 11, 2020 04:23
Approaches to dependency-injection/dynamic dispatch in elixir

In many production systems you'll want to have one module capable of talking to many potential implementations of a collaborator module (e.g a in memory cache, a redis-based cache etc). While testing it's useful to control which module the module under test is talking to.

Here are the approaches I can see. The two points that seem to divide the approaches are their tool-ability (dialyzer) and their ability to handle stateful implementations (which need a pid).

Passing modules

Modules are first class, so you can pass them in. Used in EEx, where passed module must implement a behaviour.