Skip to content

Instantly share code, notes, and snippets.

@theptrk
theptrk / openweather_api_example.html
Last active Jun 3, 2020
This uses the OpenWeather current weather data API: https://openweathermap.org/current
View openweather_api_example.html
<!DOCTYPE html>
<html>
<head>
<title>Open Weather API</title>
<style type="text/css">
pre {
background-color: #f1f1f1;
padding: 5px;
margin: 5px;
border-radius: 5px;
@Atlas7
Atlas7 / octave_tip.md
Last active Jul 10, 2020
Octave - find the min (or max) value of a Matrix, and the associated row and column
View octave_tip.md

Whilst working through the many (Octave) coding assignment from Andrew Ng's Stanford Machine Learning course, a common problem that I have to solve revolves around this:

Given a Matrix A with m rows, and n columns find the mininum (or maximum) value and the associated row and column number

This article summarises my solution to this problem (which, hopefully this will also come in hadny to you!). Note that Octave index start from 1 (instead of 0).

Sample Matrix

Say we have a Matrix A that look like this:

@sebmarkbage
sebmarkbage / Enhance.js
Last active Feb 9, 2021
Higher-order Components
View Enhance.js
import { Component } from "React";
export var Enhance = ComposedComponent => class extends Component {
constructor() {
this.state = { data: null };
}
componentDidMount() {
this.setState({ data: 'Hello' });
}
render() {
@sebmarkbage
sebmarkbage / JSXSpreadAttributes.md
Last active Aug 13, 2020
JSX Spread Attributes
View JSXSpreadAttributes.md

JSX Spread Attributes

If you know all the properties that you want to place on a component a head of time, it is easy to use JSX:

  var component = <Component foo={x} bar={y} />;

Mutating Props is Bad, mkay

@spoike
spoike / reflux.js
Created Jun 29, 2014
A simpler implementation of React.JS's Flux
View reflux.js
var EventEmitter = require('events').EventEmitter,
_ = require('lodash');
/**
* Creates an action functor object
*/
exports.createAction = function() {
var action = new EventEmitter(),
eventLabel = "action",
@joho
joho / gist:3735740
Created Sep 17, 2012 — forked from rafaelss/gist:3700977
PostgreSQL 9.2 upgrade steps
View gist:3735740
Steps to install and run PostgreSQL 9.2 using Homebrew (Mac OS X)
(if you aren't using version 9.1.5, change line 6 with the correct version)
1. launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist
2. mv /usr/local/var/postgres /usr/local/var/postgres91
3. brew update
4. brew upgrade postgresql
5. initdb /usr/local/var/postgres -E utf8
6. pg_upgrade -b /usr/local/Cellar/postgresql/9.1.5/bin -B /usr/local/Cellar/postgresql/9.2.0/bin -d /usr/local/var/postgres91 -D /usr/local/var/postgres
7. cp /usr/local/Cellar/postgresql/9.2.0/homebrew.mxcl.postgresql.plist ~/Library/LaunchAgents/
View person.ajs
// Alternative JavaScript Syntax
Person = :(name, address) { @name!, @address! }
Person::inspect = :{ <: "{@name} lives at {@address}" }
tj := Person('TJ', '314 Bessborough ave')
bob := Person('Bob', 'Some place')
[tj, bob].each(:(person){ print(person.inspect()) })