ndarville

Business Models

Advertising

Models	Examples
Display ads	Yahoo!
Search ads	Google

rgreenjr

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

cpursley

PostgreSQL is Enough

• Simplify: move code into database functions
• Just Use Postgres for Everything
• Just use Postgres
• PostgreSQL is the worlds’ best database
• Postgres is eating the database world
• Hacker News discussion

Background and Cron Jobs

kjmph

-- Based off IETF draft, https://datatracker.ietf.org/doc/draft-peabody-dispatch-new-uuid-format/

create or replace function uuid_generate_v7()
returns uuid
as $$
begin
  -- use random v4 uuid as starting point (which has the same variant we need)
  -- then overlay timestamp
  -- then set version 7 by flipping the 2 and 1 bit in the version 4 string
  return encode(

addyosmani

CSS Layout Debugger

A tweet-sized debugger for visualizing your CSS layouts. Outlines every DOM element on your page a random (valid) CSS hex color.

One-line version to paste in your DevTools

Use $$ if your browser aliases it:

~ 108 byte version

mbinna

#!/usr/bin/env bash

rm -rf "${HOME}/Library/Caches/CocoaPods"
rm -rf "`pwd`/Pods/"
pod update

adamwiggins

Make it real

Ideas are cheap. Make a prototype, sketch a CLI session, draw a wireframe. Discuss around concrete examples, not hand-waving abstractions. Don't say you did something, provide a URL that proves it.

Ship it

Nothing is real until it's being used by a real user. This doesn't mean you make a prototype in the morning and blog about it in the evening. It means you find one person you believe your product will help and try to get them to use it.

Do it with style

nyg

// Thanks to http://www.labs.saachitech.com/2012/10/23/pdf-generation-using-uiprintpagerenderer
// Note: including images in the HTML won't work, see here:
// https://github.com/nyg/HTMLWithImagesToPDF

import UIKit

// 1. Create a print formatter

let html = "<b>Hello <i>World!</i></b>"
let fmt = UIMarkupTextPrintFormatter(markupText: html)

cpursley

Postgres Full Text Search

Do you really need Elastic Search?

• https://www.postgresql.org/docs/current/pgtrgm.html
• https://scoutapm.com/blog/how-to-make-text-searches-in-postgresql-faster-with-trigram-similarity
• https://about.gitlab.com/blog/2016/03/18/fast-search-using-postgresql-trigram-indexes/
• https://mazeez.dev/posts/pg-trgm-similarity-search-and-fast-like
• https://alexklibisz.com/2022/02/18/optimizing-postgres-trigram-search.html
• https://www.freecodecamp.org/news/fuzzy-string-matching-with-postgresql/

chourobin

Bridging Native & React for iOS & Android

js -> native

• Simple Example
• Callbacks
• Promises
• Properties

native -> js