sachinsmc

Top HN posts

1. Ask HN: What books changed the way you think about almost everything?

2. Ask HN: What are the best MOOCs you've taken?

3. Ask HN: How to self-learn electronics?

4. Ask HN: Successful one-person online businesses?

Nathan-Furnal

;;; init.el --- Fun stuff all around -*- lexical-binding: t; -*-

;;; Commentary:
;; This is a simple init.el which offers a Python configuration.  Each package
;; usage is annotated with the how and why of its use.  `use-package' is used to
;; manage the configuration as it provides lots of facilities to load modes,
;; define custom variables and key-maps, etc.

;;; Code:

abidanBrito

#!/usr/bin/env bash

## Author: Abidán Brito
## This script builds GNU Emacs 29.1 with support for native elisp compilation,
## tree-sitter, libjansson (C JSON library), pure GTK and mailutils.

# Exit on error and print out commands before executing them.
set -euxo pipefail

# Let's set the number of jobs to something reasonable; keep 2 cores

brock

# This is just a cheat sheet:

# On production
sudo -u postgres pg_dump database | gzip -9 > database.sql.gz

# On local
scp -C production:~/database.sql.gz
dropdb database && createdb database
gunzip < database.sql.gz | psql database

allenwb

New ES6 Constructor Semantics and Usage Examples

Manual super: Alternative Design where subclass constructors do not automatically call superclass constructors

This Gist presents a new design of class-based object construction in ES6 that does not require use of the two-phase @@create protocol.

One of the characteristics of this proposal is that subclass constructors must explicitly super invoke their superclass's constructor if they wish to use the base class' object allocation and initialization logic.

An alternative version of this design automatically invokes the base constructor in most situations.

dergachev

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

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%'