kstrauser

This is how to use the Black Python code formatter in VS Code.

Make a Python 3.6 virtualenv for running Black

Black itself requires Python 3.6 to run, but few of our projects are on that version. The VS Code plugin conveniently lets you run black from its own virtualenv.

I had to give a specific version of black this morning. I didn't yesterday. Don't specify the version unless it makes you (and if you do, give the current version, not the one from this doc).

$ cd ~/Envs

kyledcline

PSQL CLI Client

Psql is a fully-fledged CLI client for Postgres, but most people are unaware of its many advanced features.

~/.psqlrc can be edited to persist any behavior or configuration settings you want between psql sessions. It behaves just like ~/.bashrc or ~/.vimrc, sourced at psql launch. See More out of psql for some interesting configurations.

If you have a long query to write and rewrite, you can use \e to edit your query in an editor.

Use \watch at the end of a query in order to automatically re-run the query every few seconds - great for monitoring while making changes elsewhere in your application architecture.

MiloszKrajewski

module StateMachine =
    type State<'Event> =
        | Next of ('Event -> State<'Event>)
        | Stop

    let feed state event =
        match state with
        | Stop -> failwith "Terminal state reached"
        | Next handler -> event |> handler

janjongboom

navigator.mozBluetooth.defaultAdapter.startLeScan([]).then(handle => {
  console.log('Start scanning', handle);
  handle.ondevicefound = e=> {
    var record = parseScanRecord(e.scanRecord);
    if (record) {
      console.log('Found an iBeacon', record.uuid, record.major, record.minor, e.rssi);
    }
  }
 
  setTimeout(() => {

debloper

Flashing Flame Devices with Firefox OS

If you have a Flame reference device and wanna try out alternate versions of Firefox OS apart from the stock one, but not willing to build from source, then follow this mini-manual.

Get the build

You can download the packages from the Nightly Build directories of Mozilla FTP. You specifically need the following two files:

• b2g-XX.0a1.en-US.android-arm.tar.gz (XX is the version number)
• gaia.zip

jbtule

#!/bin/sh
#if run_with_bin_sh
  # Doing this because arguments can't be used with /usr/bin/env on linux, just mac
  exec fsharpi --define:mono_posix --exec $0 $*
#endif

(*
 * Crossplatform FSharp Makefile Bootstrapper
 * Apache licensed - Copyright 2014 Jay Tuley <jay+code@tuley.name>
 * v 2.0 https://gist.github.com/jbtule/9243729

evanscottgray

docker ps | awk {' print $1 '} | tail -n+2 > tmp.txt; for line in $(cat tmp.txt); do docker kill $line; done; rm tmp.txt

sergi

// Accumulators
// =============================================================================
// 
// A tiny library for reactive programming that offers blazing fast generic
// collection manipulation, asyncronous flow control and the ability to
// represent infinitely large collections.
// 
// Copyright Gordon Brander, 2013. Released under the terms of the [MIT license](http://opensource.org/licenses/MIT).
// 
// Background:

jizhang

(import 'java.security.MessageDigest
        'java.math.BigInteger)

(defn md5 [s]
  (let [algorithm (MessageDigest/getInstance "MD5")
        size (* 2 (.getDigestLength algorithm))
        raw (.digest algorithm (.getBytes s))
        sig (.toString (BigInteger. 1 raw) 16)
        padding (apply str (repeat (- size (count sig)) "0"))]
    (str padding sig)))

jlong

var parser = document.createElement('a');
parser.href = "http://example.com:3000/pathname/?search=test#hash";

parser.protocol; // => "http:"
parser.hostname; // => "example.com"
parser.port;     // => "3000"
parser.pathname; // => "/pathname/"
parser.search;   // => "?search=test"
parser.hash;     // => "#hash"
parser.host;     // => "example.com:3000"