jimmont

if(!Event.prototype.hasOwnProperty('path')){
/*
in event handlers use the event.path which looks like:
for attached DOM nodes [target,target.parentNode,...<ancestors>...,document,window]
for unattached DOM nodes [target]
for window and document: [window] [document, window]
 */
Object.defineProperty(Event.prototype, 'path', {
// for Safari
	get:function(){ 

jimmont

## 2017 Sept RPi 3
serial gpio to USB requires editing `config.txt` on sdcard, see the following
http://elinux.org/RPi_Serial_Connection
https://raspberrypi.stackexchange.com/questions/44427/how-to-connect-a-raspberry-pi-3-to-usb-tty-cable

## older, older models

https://www.raspberrypi.org/downloads/raspbian/
download the image then expand the archive and:

jimmont

<pre>
* https://google.github.io/styleguide/jsguide.html
* nytimes.com
* washingtonpost.com
* 
</pre>

jimmont

// see https://www.jimmont.com/sfmuni/
class TheControls extends HTMLElement{
	constructor(){
		super();
		this.attachShadow({mode:'open'});
		// {tags: {N: {}...}, taglist: []}
		this.data = {};
		this.addEventListener('click', this.clicked);
	}
	clicked(e){

jimmont

web components v1 (not v0)

~July 2018
various npm installed components which use named imports like `import "@name"`;
instead of a build tool or service just do a one-time conversion when updating for predictability and simplicity using standard stuff:
cd node_modules && cp -R @polymer @webcomponents @vaadin lit-html pwa-helpers ../modules/
cd ../modules/ && rm -f `find . -iname '*.map'` && rm -f `find . -iname '*.ts'`
find . -type f -name '*.js' -print0 | xargs -0 perl -plwe 's/([\\"\\'"'"'])(\@(?:polymer|webcomponents|lit-html|lit-element|vaadin\/))/$1\/modules\/$2/g' -i

jimmont

§ install

1. install Homebrew https://docs.brew.sh/Installation.html
2. install Docker
	$ brew cask install docker
	this places the Docker.app in the Applications folder, and can be launched directly to start the service
3. install mssql per the instructions https://docs.microsoft.com/en-us/sql/linux/quickstart-install-connect-docker
	$ sudo docker pull microsoft/mssql-server-linux:2017-latest
4. run the image, check the status
	$ sudo docker run -e 'ACCEPT_EULA=Y' -e 'MSSQL_PID=Developer' -e 'MSSQL_SA_PASSWORD=<password>' -p 1433:1433 --name mssql0 -d microsoft/mssql-server-linux:2017-latest

jimmont

late 2018 encrypted disk per https://openzfsonosx.org/wiki/Encryption

create new encrypted disk
plug in device
$ diskutil list
important to be absolutely certain of the device
$ sudo zpool create -f -o ashift=12 -O compression=lz4 -O casesensitivity=sensitive -O atime=off -O normalization=formD -O encryption=on -O keylocation=prompt -O keyformat=passphrase NAMEOFIT /dev/disk####
will interactively prompt for passphrase
next time importing plug in the device

jimmont

/*
take an approach leveraging the platform implementation's internal parser for things to validate,
if it works in these on the user-experience side confirm the input is as-intended
possibly by entering the same value twice or similar user-controlled validation

email and date validation is too complex for pattern matching;
*/

function validEmail(email=''){
	var $0, url, isValid = false, emailPatternInput = /^[^@]{1,64}@[^@]{4,253}$/, emailPatternUrl = /^[^@]{1,64}@[a-z][a-z0-9\.-]{3,252}$/i;

jimmont

// I always do this. Always.

Array(4).fill(undefined);

Object.values(Array(6,7,8)).length === Number(Object.keys([7,6,4]).pop()) + 1

jimmont

/*
Write some code, that will flatten an array of arbitrarily nested arrays of integers into a flat array of integers. e.g. [[1,2,[3]],4] -> [1,2,3,4].

Your solution should be a link to a gist on gist.github.com with your implementation.

When writing this code, you can use any language you're comfortable with. The code must be well tested and documented. Please include unit tests and any documentation you feel is necessary. In general, treat the quality of the code as if it was ready to ship to production.

Try to avoid using language defined methods like Ruby's Array#flatten or JavaScript's Array.flat.

*/