choonkeat

arch -x86_64 zsh 

choonkeat

https://github.com/PacktPublishing/-Learn-Rust-in-7-Days/blob/f2a59262ace5e52f16c88dcd63918ca0c0b5a903/day1/looper/src/main.rs#L9

for n in 0..10 { // 0,1,2,3,4,5,6,7,8,9

let v = vec![4,7,8,9,11,14]
for n in &v {

choonkeat

#!/bin/bash
set -euo pipefail

#
#
# `m3u8.txt` contains urls returned by `https://www.dandanzan.com/url.php`
# you can get them from your browser's network tab, look for `url.php`,
# copy the response body, and paste into your `m3u8.txt` file
#
#

choonkeat

import Url
import Url.Parser exposing ((<?>))
import Url.Parser.Query

"http://example.com/?key=Prefix%3A+Some+text+%2B+Some+words+%3D+Words+%40+%3CLast+word%3E"
|> Url.fromString
|> Maybe.andThen (Url.Parser.parse (Url.Parser.top <?> Url.Parser.Query.string "key"))
--> Just (Just "Prefix: Some text + Some words = Words @ <Last word>")

choonkeat

module ICal exposing
    ( VAlarmAction(..)
    , VAlarmTrigger(..)
    , VCalendar(..)
    , VEvent(..)
    , VEventProp(..)
    , VEventStatusValue(..)
    , eventPropString
    , eventString
    , string

choonkeat

Should be work with 0.18

Destructuring(or pattern matching) is a way used to extract data from a data structure(tuple, list, record) that mirros the construction. Compare to other languages, Elm support much less destructuring but let's see what it got !

Tuple

myTuple = ("A", "B", "C")
myNestedTuple = ("A", "B", "C", ("X", "Y", "Z"))

choonkeat

module P exposing (..)


main : Program () number msg
main =
    Platform.worker
        { init = always ( 0, Cmd.none )
        , update = \_ _ -> ( 0, Cmd.none )
        , subscriptions = always Sub.none
        }

choonkeat

type TrafficLight
    = Red
    | Yellow
    | Green


allTrafficLight : List TrafficLight
allTrafficLight =
    let
        helper list =

choonkeat

In a type specific module, we can name succinctly

module Channel

type Channel
    = Alpha
    | Beta

choonkeat

resource "aws_iam_role" "foobar-role" {
  name                = "foobar"
  path                = "/"
  assume_role_policy  = data.aws_iam_policy_document.foobar-assume-role-policy-document.json
  managed_policy_arns = [aws_iam_policy.foobar-policy.arn]
}

data "aws_iam_policy_document" "foobar-assume-role-policy-document" {
  statement {
    actions = ["sts:AssumeRole"]