adambard

(ns example.errors)

(defn clean-address [params]
  "Ensure (params :address) is present"
  (if (empty? (params :address))
    [nil "Please enter your address"]
    [params nil]))

(defn clean-email [params]
  "Ensure (params :email) matches *@*.*"

oakes

Contents

• Why care about Rust?
• The Toolchain
• Creating a New Project
• Modules
• Crates
• Types
• References
• Mutability

jordanpoulton

Driver:
  -Write the code according to the navigator's specification
  -Listen intently to the navigators instructions
  -Ask questions wherever there is a lack of clarity
  -Offer alternative solutions if you disagree with the navigator
  -Where there is disagreement, defer to the navigator. If their idea fails, get to failure quickly and move on
  -Make sure code is clean
  -Own the computer / keyboard
  -Ignore larger issues and focus on the task at hand
  -Trust the navigator - ultimately the navigator has the final say in what is written

14427

use std::rc::Rc;

trait HKT<U> {
    type C; // Current type
    type T; // Type with C swapped with U
}

macro_rules! derive_hkt {
    ($t:ident) => {
        impl<T, U> HKT<U> for $t<T> {

smarr

Introductory Material

• Add Graal JIT Compilation to Your JVM Language in 5 Steps, A Tutorial http://stefan-marr.de/2015/11/add-graal-jit-compilation-to-your-jvm-language-in-5-easy-steps-step-1/

• The SimpleLanguage, an example of using Truffle with great JavaDocs. It is the officle getting-started project: https://github.com/graalvm/simplelanguage

• Truffle Tutorial, Christan Wimmer, PLDI 2016, 3h recording https://youtu.be/FJY96_6Y3a4 Slides

ursuad

Kafka Topics

List existing topics

bin/kafka-topics.sh --zookeeper localhost:2181 --list

Describe a topic

bin/kafka-topics.sh --zookeeper localhost:2181 --describe --topic mytopic

Purge a topic

bin/kafka-topics.sh --zookeeper localhost:2181 --alter --topic mytopic --config retention.ms=1000

... wait a minute ...

Atinux

const waitFor = (ms) => new Promise(r => setTimeout(r, ms))
const asyncForEach = async (array, callback) => {
  for (let index = 0; index < array.length; index++) {
    await callback(array[index], index, array)
  }
}

const start = async () => {
  await asyncForEach([1, 2, 3], async (num) => {
    await waitFor(50)

yelouafi

In this tutorial we're going to build a set of parser combinators.

What is a parser combinator?

We'll answer the above question in 2 steps.

1. What is a parser?
2. and, what is a parser combinator?

So first question: What is parser?

vedang

(ns challenges.psk
  "A Simulation of the Passport Seva Kendra"
  (:require [clj-time.core :as ct]
            [clojure.tools.logging :as ctl])
  (:import [java.util.concurrent LinkedBlockingQueue PriorityBlockingQueue]))

(def working-hours? (atom false)) ; use this to control agents.
                                        ; Turning this off will
                                        ; shutdown agents.

dino-

#! /usr/bin/env stack
-- stack --resolver lts-18.8 script

{-# LANGUAGE OverloadedStrings #-}

{-
This is a handy illustration of converting between five of the commonly-used
string types in Haskell (String, ByteString, lazy ByteString, Text and lazy
Text).