qhwa

Daily Delivery Window Calculation

Background

In Zubale, each delivery order is assigned a specific time window during which the delivery must be completed. These windows typically span a few hours within the same day, for example, from 2:00 PM to 5:00 PM on 2nd March, 2024. Such windows have defined start and end times.

However, some orders may have delivery windows that span across multiple days. For instance:

start time	end time

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-- file: lua/init.lua
local execute = vim.api.nvim_command
local fn = vim.fn
local fmt = string.format

local pack_path = fn.stdpath("data") .. "/site/pack"

-- ensure a given plugin from github.com/<user>/<repo> is cloned in the pack/packer/start directory
local function ensure (user, repo)
  local install_path = fmt("%s/packer/start/%s", pack_path, repo)

qhwa

A Rule Service in Elixir

Agenda

1. A Rule Engine, What & Why?
2. Formular: Elixir As DSL

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{
  "id": "61d77681feda7600019c9822",
  "storeLocation": {
    "latitude": 19.4418277,
    "longitude": -99.2069606
  },
  "dropOffLocation": {
    "latitude": 19.4266579,
    "longitude": -99.17311339
  }

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Problem

Rich text in apps like Notion are represented in a JSON-based format for consistency and specificity. A simplified version for a nested list might look something like this:

[
  { "text": "One",   "indent": 0, "type": "ordered" },
  { "text": "Two",   "indent": 0, "type": "ordered" },
  { "text": "Alpha", "indent": 1, "type": "bullet"  },

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defmodule TwoLowest do
  def sum_of_two_lowest(numbers) do
    numbers
    |> lowest_two()
    |> IO.inspect(label: :lowest_two)
    |> sum()
    |> IO.inspect(label: :sum)
  end

  defp lowest_two(numbers, found \\ [])

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defmodule MyRegister do
  @enforce_keys [:email]

  defstruct [:email, valid?: true, errors: nil]

  def register_user_email(email) do
    %__MODULE__{email: email}
    |> ok_then(&ensure_not_nil/1)
    |> ok_then(&downcase/1)
    |> ok_then(&validate_format/1)

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use Bitwise

even? = fn number ->
  (number &&& 1) == 0
end


0..20
|> Enum.filter(even?)

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defmodule HitRate do
  @moduledoc """
  Documentation for `HitRate`.
  """

  def calc(file_path) do
    file_path
    |> stream()
    |> Enum.to_list()
    |> IO.inspect(label: :stream)

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iex> 'l🍭p'
[108, 127853, 112]