prihandi’s gists

prihandi / hls.sh

Created November 9, 2024 03:44 — forked from stenuto/hls.sh

HLS ffmpeg script

	#!/bin/bash

	# Function to display usage information
	usage() {
	echo "Usage: $0 /path/to/input.mp4 [ /path/to/output_directory ]"
	exit 1
	}

	# Check if at least one argument (input file) is provided
	if [ $# -lt 1 ]; then

prihandi / tsv_streaming.ex

Last active July 8, 2025 03:47

using NimbleCSV with file stream for parsing Tab separated CSV, because NimbleCSV.Spreadsheet.parse_stream didn't work

	NimbleCSV.define(TabSeparatedCSVParser,
	separator: "\t",
	escape: "\"",
	encoding: :utf8,
	trim_bom: false
	)

	defmodule Parser(input_file) do
	def run(input_file) do
	input_file

prihandi / s3_downloads.ex

Created November 29, 2023 03:07

Elixiir S3 Downloads no dependency

	defmodule S3Downloads do
	@moduledoc """
	Use at your own risk.

	Code heavily borrowed from:
	- https://github.com/ex-aws/ex_aws/blob/main/lib/ex_aws/auth.ex
	- https://gist.github.com/chrismccord/37862f1f8b1f5148644b75d20d1cb073

	"""

prihandi / config_helper.ex

Created March 10, 2023 01:20

Helper functions to resolve config from environment variables.

	defmodule ConfigHelpers do
	@type config_type :: :str \| :int \| :bool \| :json

	@doc """
	Get value from environment variable, converting it to the given type if needed.

	If no default value is given, or `:no_default` is given as the default,
	an error is raised if the variable is not set.
	"""
	@spec get_env(String.t(), :no_default \| any(), config_type()) :: any()

prihandi / check_no_of_database_pool.exs

Last active March 9, 2023 08:47

Check number of realtime database pool without relying on config

	DBConnection.ConnectionPool.Supervisor
	\|> Supervisor.which_children()
	\|> Enum.each(fn {_, pid, _, _} ->
	[
	{{_adapter_prot, starter_pid, _worker_no}, _worker_pid, :worker, [_conn_module]}
	\| _
	] = children_list = Supervisor.which_children(pid)

	repo_name =
	starter_pid

prihandi / EDDSA sign and verify on Elixir with erlang:crypto module.ex

Last active December 1, 2021 06:59

	# Generate EDDSA public key and private key
	{public_key, priv_key} = :crypto.generate_key(:eddsa, :ed25519)

	# Payload that need to be signed
	payload = "some_string"

	# Generate signature with both public key and private key
	signature = :public_key.sign(payload, :none, {:ed_pri, :ed25519, public_key, priv_key}, [])

	# Verify signature with public key

prihandi / isbn_13.rb

Created January 15, 2018 04:51

Calculate the 13th number of 12 chars ISBN numbers

	def create_isbn13(isbn_12)
	isbn_arr = isbn_12.to_s.chars.map(&:to_i)
	sumarr = isbn_arr.each.with_index.inject(0) { \|sum,(value,index)\| index.even? ? sum+(value1) : sum+(value3) }
	last_digit = (10 - (sumarr % 10)) % 10
	isbn13 = isbn_12.to_s + last_digit.to_s
	end

prihandi / token+password_matcher.go

Last active September 14, 2017 13:24

	import (
	"fmt"
	"math/rand"
	"regexp"
	"golang.org/x/crypto/bcrypt"
	)

	func ValidatePassword(hashedPassword, plainPassword string) (isValid bool) {
	hashedPasswordInBytes := []byte(hashedPassword)
	plainPasswordInBytes := []byte(plainPassword)

prihandi / inspira_spiral.rb

Created March 20, 2017 13:57

	def cetakPola(size=1)
	arr = Array.new(size) { Array.new(size) }
	chars = (size**2).to_s.size
	maks = size-1
	x = maks / 2
	y = maks / 2

	(1..size).each do \|ps\|
	start = (ps-1)**2 + 1
	ends = ps**2

prihandi / Question.md

Last active December 27, 2016 06:58

Ruby example question

Given two class definition, Car and Bus :

    class Car
      def honk
        puts "Teen, Teen"
 end