hugooliveirad

import { createMachine, assign } from "xstate";

type MachineContext = {
  lives: number;
};

type MachineEvent =
  | { type: "IDLE" }
  | { type: "WALK" }
  | { type: "RUN" }

hugooliveirad

<?xml version="1.0" encoding="UTF-8"?>
<!-- TeXML files must contain the Response element -->
<Response>
 <!-- Say and Dial are Verbs -->
 <Say>Thank you for calling Telnyx.</Say>
 <Dial>
   <Sip>sip:gencredhoj84HXAATNAXTfLJBkZBFv0sr@sip.telnyx.com</Sip>
 </Dial>
</Response>

hugooliveirad

(defn button [props _]
  (om/component
    (dom/button nil (:children props))))

(def render-out (om/render-to-object button {:children "text"}))
  
(is (= "text" (:children render-out))

hugooliveirad

jack-in into normal Clojure nREPL. Run:

(require '[cljs.repl :as repl] '[cljs.repl.node :as node])

(compile 'cljs.repl.node)

(cemerick.piggieback/cljs-repl (cljs.repl.node/repl-env))

hugooliveirad

// radians->degrees
function degrees(radians) {
  return radians * 180 / Math.PI;
}

// gets two positions { x: Number, y: Number } and return
// angle between them in radians
function getAngle(pos1, pos2 = {x: 0, y: 0}) {
  let [dx, dy] = [pos1.x - pos2.x, (pos1.y - pos2.y) * -1]
  return Math.atan2(dy, dx);

hugooliveirad

function createReducer(handlers, initialState) {
    return function reducer(state = initialState, action) {
    	return handlers[action.type] ?
    		  handlers[action.type](state, action)
    		: state
	}
}

const math = createReducer({
	INCREMENT: (state) => state + 1,

hugooliveirad

node -e "require('repl').start({ignoreUndefined: true})"

hugooliveirad

Composing styles

CSS Wizardry recently wrote a great post about styling: Contextual Styling: UI Components, Nesting, and Implementation Detail. He showed three ways to solve the problem of implementation details in a component's styles. I want to propose another way to solve this problem, one that uses composition.

The original styles of a .nav-primary component are:

.nav-primary {
  /* This is how the nav should always look: */
 margin: 0;

hugooliveirad

(ns ^:figwheel-always om-tut.core
    (:require-macros [cljs.core.async.macros :refer [go]])
    (:require [om.core :as om :include-macros true]
              [om.dom :as dom :include-macros true]
              [cljs.core.async :refer [put! chan <!]]
              [clojure.data :as data]
              [clojure.string :as string]))

(enable-console-print!)

hugooliveirad

Source: https://crashingdaily.wordpress.com/2008/03/06/diff-two-stdout-streams/

You can diff two commands stdout without creating two files. <( ... ) command creates a temporary file with the stdout of the command inside it.

Example:

diff -B <( ls -1 / ) <( ls -1 ~ )