Seth Krasnianski sethkrasnianski

Automatic build versions from git in Xcode (and other goodies)

Installation procedure for pre-build actions to automatically populate Xcode Info.plist with dynamic data.

1. Xcode Scheme pre-action

Edit Xcode Scheme and add a pre-action script. Copy the contents of preaction.sh into the pre-action script box.

Recently, I had a staging database on Heroku that was running on the Ronin database (which was originally the lowest-sized DB you could get at Heroku). Since they added two new options, Crane and Kappa, we wanted to take advantage of the cost savings. Here's how you can migrate your Ronin DB to Crane (or any other plan).

The old database was named BROWN while the new one is CRIMSON. You can determine this by running:

heroku pg:info --app myapp-staging

Add Crane database

 heroku addons:add heroku-postgresql:crane --app myapp-staging

heroku pg:wait --app myapp-staging

Types

A type is a collection of possible values. An integer can have values 0, 1, 2, 3, etc.; a boolean can have values true and false. We can imagine any type we like: for example, a HighFive type that allows the values "hi" or 5, but nothing else. It's not a string and it's not an integer; it's its own, separate type.

Statically typed languages constrain variables' types: the programming language might know, for example, that x is an Integer. In that case, the programmer isn't allowed to say x = true; that would be an invalid program. The compiler will refuse to compile it, so we can't even run it.

Hi Nicholas,

I saw you tweet about JSX yesterday. It seemed like the discussion devolved pretty quickly but I wanted to share our experience over the last year. I understand your concerns. I've made similar remarks about JSX. When we started using it Planning Center, I lead the charge to write React without it. I don't imagine I'd have much to say that you haven't considered but, if it's helpful, here's a pattern that changed my opinion:

The idea that "React is the V in MVC" is disingenuous. It's a good pitch but, for many of us, it feels like in invitation to repeat our history of coupled views. In practice, React is the V and the C. Dan Abramov describes the division as Smart and Dumb Components. At our office, we call them stateless and container components (view-controllers if we're Flux). The idea is pretty simple: components can'

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

Stores data elements based on an sequential, most commonly 0 based, index.
Based on tuples from set theory.

	/**
	* jQuery 2.1.3's parseHTML (without scripts options).
	* Unlike jQuery, this returns a DocumentFragment, which is more convenient to insert into DOM.
	* MIT license.
	*
	* If you only support Edge 13+ then try this:
	function parseHTML(html, context) {
	var t = (context \|\| document).createElement('template');
	t.innerHTML = html;
	return t.content.cloneNode(true);

	#!/usr/bin/env sh

	# Multiple vulnerabilities have been disclosed in RubyGems:
	# https://www.ruby-lang.org/en/news/2018/02/17/multiple-vulnerabilities-in-rubygems/
	#
	# If you're an Rbenv user, here's any easy one-liner to upgrade to a
	# safe version of Rubygems (2.7.6 or later) for each installed Ruby version:

	for i in $( rbenv versions --bare ); do RBENV_VERSION=$i gem update --system && echo "\n$(ruby -v) using rubygems $(gem --version)\n"; done

	#!/bin/bash

	# I made this script to convert SVG icons for an iOS app into PNG.
	# The script will create icons in 3 sizes for different screen DPIs.

	find . -type f -name "*.svg" \| while read f
	do
	FILENAME="${f%.*}"
	echo '---'
	inkscape -W "$FILENAME.svg"

	(ns wl.core
	(:use compojure.core, aleph.core, aleph.http, hiccup.core, hiccup.page-helpers)
	(:require [compojure.route :as route])
	(:gen-class))

	(def broadcast-channel (channel))

	(defn chat-handler [ch handshake]
	(receive ch
	(fn [name]