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Kim Yu Ng kimyu-ng

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kimyu-ng / arel_bug.rb

Created May 2, 2018 05:40

rails arel sql bug

	# frozen_string_literal: true

	begin
	require 'bundler/inline'
	rescue LoadError => e
	$stderr.puts 'Bundler version 1.10 or later is required. Please update your Bundler'
	raise e
	end

	gemfile(true) do

kimyu-ng / config.yml

Created October 5, 2017 15:41

circleci 2.0 config.yml

	version: 2

	jobs:
	build:
	working_directory: /app
	docker:
	- image: smarthr/circleci-base
	environment:
	RAILS_ENV: test
	DB_HOST: 127.0.0.1

kimyu-ng / Gemfile

Created August 8, 2017 20:53 — forked from nateberkopec/Gemfile

ActionCable isn't *really* a Rails 5 dependency.

	# gem 'rails'
	gem "activerecord"
	gem "actionpack"
	gem "actionview"
	gem "actionmailer"
	gem "activejob"
	gem "activesupport"
	gem "railties"
	gem "sprockets-rails"
	gem 'sqlite3'

kimyu-ng / gist:7f29092d1d0497c707266d236b3fff65

Created April 27, 2017 17:20 — forked from CristinaSolana/gist:1885435

Keeping a fork up to date

1. Clone your fork:

git clone [email protected]:YOUR-USERNAME/YOUR-FORKED-REPO.git

2. Add remote from original repository in your forked repository:

cd into/cloned/fork-repo
git remote add upstream git://github.com/ORIGINAL-DEV-USERNAME/REPO-YOU-FORKED-FROM.git
git fetch upstream

kimyu-ng / iterm2-solarized.md

Created April 26, 2017 19:10 — forked from kevin-smets/iterm2-solarized.md

iTerm2 + Oh My Zsh + Solarized color scheme + Meslo powerline font + [Powerlevel9k] - (macOS)

Default

Powerlevel9k

kimyu-ng / vim-on-heroku.sh

Created April 14, 2017 22:13 — forked from btakita/vim-on-heroku.sh

	#!/usr/bin/env bash
	curl https://s3.amazonaws.com/heroku-jvm-buildpack-vi/vim-7.3.tar.gz --output vim.tar.gz
	mkdir vim && tar xzvf vim.tar.gz -C vim
	export PATH=$PATH:/app/vim/bin

kimyu-ng / Java.md

Created September 23, 2016 20:04 — forked from JeOam/Java.md

Install Java 8 on OS X

on El Capitan, after installing the brew...

$ brew update
$ brew tap caskroom/cask
$ brew install Caskroom/cask/java

And Java 8 will be installed at /Library/Java/JavaVirtualMachines/jdk1.8.xxx.jdk/

Check version:

kimyu-ng / query_planner.markdown

Created September 13, 2016 16:16 — forked from hgmnz/query_planner.markdown

PostgreSQL query plan and SQL performance notes

Types of index scans

Indexes

Sequential Scan:

Read every row in the table
No reading of index. Reading from indexes is also expensive.

kimyu-ng / simple-linear-regression.rb

Created August 17, 2016 17:50 — forked from rweald/simple-linear-regression.rb

Simple Linear Regression in Ruby

	class SimpleLinearRegression
	def initialize(xs, ys)
	@xs, @ys = xs, ys
	if @xs.length != @ys.length
	raise "Unbalanced data. xs need to be same length as ys"
	end
	end

	def y_intercept
	mean(@ys) - (slope * mean(@xs))

kimyu-ng / 15_to_18.rb

Created April 18, 2016 22:49

Conversion of 15 to 18 digits for Salesforce

	# http://codefriar.tumblr.com/post/34159033581/salesforce-15-18-digit-guid-conversion-in-ruby
	def convert_guid(short_guid)
	chunks = short_guid.chars.to_a
	char_map = %w{A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5}
	extension = []
	chunks.each_slice(5) { \|x\| y = x.reverse.map {\|c\| (c.match /[A-Z]/) ? 1 : 0 }.join("").to_i(2) ; extension << y}
	short_guid + (extension.map {\|e\| char_map.at(e)}).join("").to_s
	end