Preston Pham prestonp

Some thoughts on building software

For http services, instrument trace ids asap. New requests should either generate a randomized trace uid and store it in context or inherit one from a header
Always set up structured logging so that you can index and query by various properties
Set up global exception handling
Set up testing asap, even if project is early stage, it is easier to build for testing from the start rather than cobbling afterwards when there are possible roadblocks like global state, singletons, brittle interfaces and dependencies.
The higher up the callstack, the more abstraction and declarative a component should be. For example, things written inside the main() should be high level and semantic. More specific code can be more imperative, but it helps to have readability from the top of the program so that the big picture/taxonomy of components is readily apparent.
Unix philosophy is paramount and applies to many other contexts
Database migration on start up is a simple way of tac

you can mark comments on postgres tables and columns like what-what:

comment on table user is 'this table stores user info';
comment on column user.age is 'user age';

and view them in psql

	# assuming positions are 2-tuple of row, column coordinates
	def shortest_risk(cave, risk_total = 0, current_position)
	if is_exit(cave, current_position):
	return risk_total + cave[current_position]

	new_total = risk_total + cave[current_position]
	new_cave = mark_cave_visited(cave, current_position)

	left = [current_position[0], current_position[1] - 1]
	right = [current_position[0], current_position[1] + 1]

	import (
	"fmt"
	"log"
	"os"
	)

	func debug(s string, o ...interface{}) {
	f, err := os.OpenFile("/tmp/debug.log",
	os.O_APPEND\|os.O_CREATE\|os.O_WRONLY, 0644)
	if err != nil {

	<html>
	<body>
	<button onclick="s.dispatch('increment')">increment</button>
	<button onclick="s.dispatch('decrement')">decrement</button>
	<button onclick="unsubscribe()">unsubscribe</button>
	<div id="main"></div>

	<script>
	function Store(reducer) {
	this.reducer = reducer;

	<?xml version="1.0" encoding="UTF-8"?>
	<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
	<plist version="1.0">
	<dict>
	<key>Label</key>
	<string>org.golang.godoc</string>
	<key>EnvironmentVariables</key>
	<dict>
	<!-- set your gopath -->
	<key>GOPATH</key>

	class TestForm extends React.Component {
	constructor() {
	super();
	this.state = {
	name: '',
	address: '',
	};

	this.nameOnChange = this.nameOnChange.bind(this);
	this.addressOnChange = this.addressOnChange.bind(this);

	go run quine.go > quine2.go
	diff quine.go quine2.go