Skip to content

Instantly share code, notes, and snippets.

View telekosmos's full-sized avatar
💭
👻

Guillermo C. Martínez telekosmos

💭
👻
11 followers · 1 following
  • Madrid
View GitHub Profile
@telekosmos
telekosmos / MonadAndFs2Ops.md
Created February 18, 2022 15:31 — forked from Daenyth/MonadAndFs2Ops.md
Cheat sheet for common cats monad and fs2 operation shapes
Operation Input Result Notes
map F[A] , A => B F[B] Functor
apply F[A] , F[A => B] F[B] Applicative
(fa, fb, ...).mapN (F[A], F[B], ...) , (A, B, ...) => C F[C] Applicative
(fa, fb, ...).tupled (F[A], F[B], ...) F[(A, B, ...)] Applicative
flatMap F[A] , A => F[B] F[B] Monad
traverse F[A] , A => G[B] G[F[A]] Traversable; fa.traverse(f) == fa.map(f).sequence; "foreach with effects"
sequence F[G[A]] G[F[A]] Same as fga.traverse(identity)
attempt F[A] F[Either[E, A]] Given ApplicativeError[F, E]
@telekosmos
telekosmos / latency.markdown
Created November 12, 2021 11:56 — forked from josejuansanchez/latency.markdown
Latency numbers every programmer should know

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

@telekosmos
telekosmos / snapshot_utility.py
Created July 29, 2019 15:23 — forked from tomconte/snapshot_utility.py
Sample Python script to manage Azure Blob Storage snapshots: list snapshots, take a snapshot, delete a snapshot, copy a snapshot to a new Blob.
#!/usr/bin/python
from azure.storage import BlobService
import argparse
parser = argparse.ArgumentParser()
parser.add_argument("container", help="the blob container")
parser.add_argument("blob", help="the blob name")
parser.add_argument("-s", "--snapshot", help="take a new snapshot", action="store_true")
parser.add_argument("-d", "--delete", help="delete a snapshot")
@telekosmos
telekosmos / curl.md
Created April 11, 2019 13:08 — forked from subfuzion/curl.md
curl POST examples

Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

@telekosmos
telekosmos / AngularJS Provider Test Example
Created July 6, 2016 17:13 — forked from cesarandreu/AngularJS Provider Test Example
Example of how you can test your AngularJS providers.
Look at the README.
@telekosmos
telekosmos / angular-chai-as-promised.js
Last active July 3, 2016 11:32 — forked from anonymous/angular-chai-as-promised.js
Angular/chai-as-promised (real) setup
/**
* Test
*/
// from http://plnkr.co/edit/WAvvu99uLhVRmdlwRWDv
describe("Promise", function() {
var $q,
intervalRef;
beforeEach(module(function(_$exceptionHandlerProvider_) {
@telekosmos
telekosmos / angularjs_directive_attribute_explanation.md
Created June 24, 2016 10:11 — forked from CMCDragonkai/angularjs_directive_attribute_explanation.md
JS: AngularJS Directive Attribute Binding Explanation

AngularJS Directive Attribute Binding Explanation

When using directives, you often need to pass parameters to the directive. This can be done in several ways. The first 3 can be used whether scope is true or false. This is still a WIP, so validate for yourself.

  1. Raw Attribute Strings

    <div my-directive="some string" another-param="another string"></div>
@telekosmos
telekosmos / testrunner.html
Created June 22, 2016 08:04 — forked from jonnyreeves/testrunner.html
Unit Testing Promises with Sinon.js
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<link rel="stylesheet" href="http://code.jquery.com/qunit/git/qunit.css" type="text/css" media="screen" />
<!-- when.js Promises implementation -->
<script src="https://raw.github.com/cujojs/when/master/when.js"></script>
<!-- Unit testing and mocking framework -->
<script type="text/javascript" src="http://code.jquery.com/qunit/git/qunit.js"></script>
@telekosmos
telekosmos / .jshintrc.js
Created June 11, 2016 09:52 — forked from connor/.jshintrc.js
jshintrc example
// NOTE: I added the .js extension to this gist so it would have syntax highlighting. This file should have NO file extension
{
// Settings
"passfail" : false, // Stop on first error.
"maxerr" : 100, // Maximum error before stopping.
// Predefined globals whom JSHint will ignore.
"browser" : true, // Standard browser globals e.g. `window`, `document`.