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koolquark / mnesia_example_qlc.md

Created November 8, 2018 06:02

rd(tst,{name,desc}). 
application:stop(mnesia). 
mnesia:create_schema([node()]). 
application:start(mnesia). 
mnesia:create_table(tsts,
 [{record_name, tst},
 {attributes, record_info(fields, tst)},
 {disc_copies, [node()]},
 {type, set}]).

koolquark / keycloak_admin_login.sh

Created November 16, 2018 07:44

	#!/bin/bash

	export TKN=$(curl -X POST 'http://localhost:8080/auth/realms/master/protocol/openid-connect/token' \
	-H "Content-Type: application/x-www-form-urlencoded" \
	-d "username=admin" \
	-d 'password=admin' \
	-d 'grant_type=password' \
	-d 'client_id=admin-cli' \| jq -r '.access_token')

	curl -X GET 'http://localhost:8080/auth/admin/realms' \

koolquark / postgresql.md

Last active November 21, 2018 19:10

Postgresql Create Database and User

CREATE DATABASE hello_dev;
CREATE USER devel WITH ENCRYPTED PASSWORD 'devel';
GRANT ALL PRIVILEGES ON DATABASE hello_dev TO devel;
ALTER USER devel CREATEDB;
# Also pg_hba.conf 
local all devel md5

koolquark / mongodb_erlang_skip_batch_size.txt

Created December 2, 2018 10:05

mongodb erlang skip and batchsize

	2> application:ensure_all_started(mongodb).
	{ok,[bson,poolboy,pbkdf2,mongodb]}
	3>
	3> Database = <<"test">>.
	<<"test">>
	4> {ok, Connection} = mc_worker_api:connect ([{database, Database},{w_mode, safe}]).
	{ok,<0.181.0>}
	5>
	5> % Drop all the docs
	5> Collection = <<"test">>.

koolquark / map_match.ex

Created June 21, 2019 11:06

Elixir - Map matching at function head

	defmodule MapTest do
	def hmap(%{ :a => "a"} = changeset) do
	IO.inspect changeset
	end
	end

	MapTest.hmap(%{ :a => "a", :b => "B" }) # matches
	MapTest.hmap(%{ :a => "A", :b => "B" }) # clause error

koolquark / stack_trace.ex

Created June 21, 2019 15:42

Get Current Stack Trace in Elixir

Process.info(self(), :current_stacktrace)

koolquark / match_params.ex

Created June 21, 2019 15:51

Matching two parameter values at function head

	defmodule FnEx do
	def m( %{ :a => a } , a ) do
	IO.puts "Hello"
	end
	end

koolquark / try_catch_throw.ex

Created June 21, 2019 16:04

Elixir - try catch throw example

	defmodule Excep do

	def ex() do
	try do
	throw("a")
	catch
	c ->
	IO.inspect c # "a"
	end
	end

koolquark / anon_call.ex

Last active June 21, 2019 16:25

Elixir - Calling anonymous function at definition itself

	(fn true -> IO.puts("yes its true") end).(true)

	# Example
	"hello" \|> ( fn msg -> IO.puts(msg) end ).()

koolquark / if_compact.ex

Created June 21, 2019 16:27

Elixir - One-liner if

if v, do: "v", else: "no_v"

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