tennisonchan

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

tennisonchan

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

tennisonchan

import tensorflow as tf
import numpy as np
from google.protobuf import json_format
import json

np.random.seed(12345)


def tensorflow_get_weights():
    """

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tennisonchan

CREATE EXTENSION btree_gist;

CREATE TABLE room_reservations (
    room_id integer,
    reserved_at timestamptz,
    reserved_until timestamptz,
    canceled boolean DEFAULT false,
    EXCLUDE USING gist (
        room_id WITH =, tstzrange(reserved_at, reserved_until) WITH &&
    ) WHERE (not canceled)

tennisonchan

Ember.js currently doesn't have baked in support for Service Worker. They want this and there's an ember-cli RFCS thread discussing strategies however a number of tooling efforts exist to help fill in this gap today.

Note: you can of course just write vanilla Service Worker code for your Ember.js apps and that will work just fine. This doc tracks tooling and libraries that lower the friction for getting this setup

Service Worker Libraries

• sw-precache
• sw-toolbox

These static resource precaching and runtime caching libraries are lower-level than Broccoli, but can be used directly

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function getSelectionString(el, win) {
    win = win || window;
    var doc = win.document, sel, range, prevRange, selString;
    if (win.getSelection && doc.createRange) {
        sel = win.getSelection();
        if (sel.rangeCount) {
          prevRange = sel.getRangeAt(0);
        }
        range = doc.createRange();
        range.selectNodeContents(el);

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FROM ensogo/passenger-ruby23:0.9.18
MAINTAINER tennison.chan+dockerfile-gist@gmail.com

ENV HOME /root

CMD ["/sbin/my_init"]

RUN apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
RUN apt-get update
# Upgrade Passenger

tennisonchan

2015-01-29 Unofficial Relay FAQ

Compilation of questions and answers about Relay from React.js Conf.

Disclaimer: I work on Relay at Facebook. Relay is a complex system on which we're iterating aggressively. I'll do my best here to provide accurate, useful answers, but the details are subject to change. I may also be wrong. Feedback and additional questions are welcome.

What is Relay?

Relay is a new framework from Facebook that provides data-fetching functionality for React applications. It was announced at React.js Conf (January 2015).

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/*
 * object.watch polyfill
 *
 * 2012-04-03
 *
 * By Eli Grey, http://eligrey.com
 * Public Domain.
 * NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
 */