pilliq

A slightly updated version of this doc is here on my website.

Why I Like Go

I visited with PagerDuty yesterday for a little Friday beer and pizza. While there I got started talking about Go. I was asked by Alex, their CEO, why I liked it. Several other people have asked me the same question recently, so I figured it was worth posting.

Goroutines

The first 1/2 of Go's concurrency story. Lightweight, concurrent function execution. You can spawn tons of these if needed and the Go runtime multiplexes them onto the configured number of CPUs/Threads as needed. They start with a super small stack that can grow (and shrink) via dynamic allocation (and freeing). They are as simple as go f(x), where f() is a function.

d3.legend

d3.legend is a quick hack to add a legend to a d3 chart. Simply add a g and .call(d3.legend). Any elements that have a title set in the "data-legend" attribute will be included when d3.legend is called. Each title will appear only once (even when multiple items define the same data-legend) as the process uses a set based on a existing names, not an array of all items.

Color

By default the color in the legend will try to match the fill attribute or the stroke attribute of the relevant items. Color can be explicitly defined by attribute "data-legend-color"

Order

The order of items in the legend will be sorted using the top of the bounding box for each included item. The order can be explicitly defined by attribute "data-legend-pos"

This demonstrates the math used to create the "seating chart"-style shapes on our House Outlook page.

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

	// assumes variable data, which is a homogenous collection of objects

	// get keys
	var keys = _.keys(data[0]);

	// convert to csv string
	var csv = keys.join(",");
	_(data).each(function(row) {
	csv += "\n";
	csv += _(keys).map(function(k) {

	license: gpl-3.0
	redirect: https://observablehq.com/@d3/zoom-to-bounding-box

	license: gpl-3.0
	redirect: https://observablehq.com/@d3/gradient-encoding

	license: gpl-3.0
	redirect: https://observablehq.com/@mbostock/circular-segment