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(deftheme birds-of-ruin
  "Created 2021-03-16.")

(custom-theme-set-faces
 'birds-of-ruin
 '(cursor ((t (:foreground "#865C38" :background "#E6E1C4"))))
 '(fixed-pitch ((t (:family "Monospace"))))
 '(variable-pitch ((((type w32)) (:foundry "outline" :family "Arial")) (t (:family "Sans Serif"))))
 '(escape-glyph ((t (:foreground "#BE73FD"))))
 '(homoglyph ((((background dark)) (:foreground "cyan")) (((type pc)) (:foreground "magenta")) (t (:foreground "brown"))))

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;; -*- mode: emacs-lisp; lexical-binding: t -*-
;; This file is loaded by Spacemacs at startup.
;; It must be stored in your home directory.

(defun dotspacemacs/layers ()
  "Layer configuration:
This function should only modify configuration layer settings."
  (setq-default
   ;; Base distribution to use. This is a layer contained in the directory
   ;; `+distribution'. For now available distributions are `spacemacs-base'

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mogwai uses web-sys and wasm_bindgen to accomplish DOM creation and dynamic updates. Mogwai's main type Gizmo<T> has a type variable T meant to be filled by web-sys types that represent DOM nodes. Since web-sys's operations rely on javascript->wasm interop, any server side (ie rust only) pre-rendering should not happen through the normal browser-bound mogwai codepath. Of course using web-sys in this way would compile fine - but attempting to build the DOM and run a mogwai Gizmo when compiled to native code would cause a panic. Not all is lost though, as this actually points us in the direction of a sane implementation so long as we don't get carried away.

mogwai is meant to be a lightning fast frontent library, not a feature-rich web development framework. There are already plenty of heavy frameworks (I'm looking at Yew, kid). To this end I don't want to push mogwai into becoming an "isomorphic" framework (ie one that can run the same code on both server and browser). Instead I would

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• Understand the concepts of voltage, resistance and current
• Use Ohm's Law to calculate voltage, current and resistance
• Use Kirchhoff's Laws to calculate voltage and current
• Understand the meaning of and calculate energy and power
• Use resistors in various configurations, like in voltage dividers and voltage ladders
• Read the value of a resistor from its package
• Use pull-up and pull-down resistors
• Understand the use of capacitors
• Use capacitors as energy stores and filters
• Calculate the RC time constant of a capacitor

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HH task #2 Contract

This is the decscription of a task that requires some EE skills.

description

The task in question is to create and test (by breadboarding) a circuit that uses a [small, through-hole photointerrupter][sensor] that can be reliably read by a raspberry pi GPIO input pin (3.3v). The purpose of the circuit is to detect when an object (like a sheet of paper) passes through the photointerrupter by reading a boolean on/off signal. The circuit should be prioritized for low-power use and polling speed, if possible.

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#! /bin/bash
# requires curl and jq on PATH: https://stedolan.github.io/jq/

# create a new release 
# user: user's name 
# repo: the repo's name
# token: github api user token
# tag: name of the tag pushed 
create_release() {
    user=$1

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#[macro_export]
macro_rules! syntax_for {
    ( $x:expr ) => {
        impl From<$x> for Expression<$x> {
            fn from(v: $x) -> Expression<$x> {
                Expression::from_term(Term::new(v, 1.0))
            }
        }

        impl Add<f64> for $x {

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;; -*- mode: emacs-lisp -*-
;; This file is loaded by Spacemacs at startup.
;; It must be stored in your home directory.

(defun dotspacemacs/layers ()
  "Configuration Layers declaration.
You should not put any user code in this function besides modifying the variable
values."
  (setq-default
   ;; Base distribution to use. This is a layer contained in the directory

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{-# LANGUAGE AllowAmbiguousTypes   #-}
{-# LANGUAGE FlexibleInstances     #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE ScopedTypeVariables   #-}
{-# LANGUAGE TypeApplications      #-}
{-# LANGUAGE TypeFamilies          #-}
{-# LANGUAGE UndecidableInstances  #-}
module Lib
    ( someFunc
    ) where

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-- It would be nice to introduce more layout options. Something like annotated text
-- in iOS/UIKit.

-- | This is how Sandy uses cairo/pango. 
-- https://github.com/isovector/sequoia/blob/master/src/Game/Sequoia.hs#L262-L284
renderElement :: Engine -> Element -> Cairo.Render ()
renderElement _ (TextElement (Text { textColor = (Color r g b a), .. })) = do
    Cairo.save

    layout <- Pango.createLayout textUTF8