fengshuo fengshuo

fengshuo / nokogiri_install

Created November 9, 2018 21:18 — forked from sobstel/nokogiri_install

nokogiri -> ERROR: cannot discover where libxml2 is located on your system

	# `ERROR: Error installing nokogiri:
	# ERROR: Failed to build gem native extension.
	#
	# current directory: /usr/local/var/rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/nokogiri-1.7.0/ext/nokogiri
	# /usr/local/var/rbenv/versions/2.3.1/bin/ruby -r ./siteconf20170103-68488-r71c9j.rb extconf.rb --with-xml=/usr/local/Cellar/libxml2/ --use-system-libraries
	# checking if the C compiler accepts ... yes
	# checking if the C compiler accepts -Wno-error=unused-command-line-argument-hard-error-in-future... no
	# Building nokogiri using system libraries.
	# ERROR: cannot discover where libxml2 is located on your system. please make sure `pkg-config` is installed.
	# * extconf.rb failed *

fengshuo / postgres_queries_and_commands.sql

Created January 17, 2019 20:57 — forked from rgreenjr/postgres_queries_and_commands.sql

Useful PostgreSQL Queries and Commands

	-- 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%'

fengshuo / Trie.js

Created June 7, 2019 18:33 — forked from deadlocked247/Trie.js

Trie implementation in ES6, good for string autocomplete

	/* Class representing a Trie data structure */
	export default class Trie {

	/**
	* Creates a Trie
	* @return {Object} Trie
	*/
	constructor() {
	this.words = 0;
	this.prefixes = 0;

fengshuo / sidekiq_monitoring

Created July 16, 2019 19:55 — forked from ngsmrk/sidekiq_monitoring

Sidekiq queue checking via rails console