wasabigeek

Blog Post: https://www.wasabigeek.com/blog/what-does-a-1972-paper-have-to-do-with-the-single-responsibility-principle/

The bits of the paper I deliberately left out:

• Comparisons:
  • correctness and comprehensibility were deemed similar for both Modularizations, so I left it out.
  • independent development: Modularization 2 was deemed better, as in Modularization 1 the devs building each module would have to agree upon and develop the shared input storage.
• Efficiency:
  • I had trouble understanding this bit, think it had more relevance to the programming systems of the time: "(Modularization 2), if implemented with the conventional assumption that a module consists of one or more subroutines, will be less efficient in most cases."
• An anecdotal example of building a translator was given in further support of "Information Hiding".

wasabigeek

module Mocha
  class Mock
    # change to *args, **kwargs
    def method_missing(symbol, *args, **kwargs, &block)
      check_expiry
      check_responder_responds_to(symbol)
      # change to *arg, **kwargs
      invocation = Invocation.new(self, symbol, *args, **kwargs, &block)
      if (matching_expectation_allowing_invocation = all_expectations.match_allowing_invocation(invocation))
        matching_expectation_allowing_invocation.invoke(invocation)

wasabigeek

import React, { useState } from "react";

const SubscribeButton = ({ initialSubscribed = false }) => {
  const [isSubscribed, setIsSubscribed] = useState(initialSubscribed);
  const [isHovered, setIsHovered] = useState(false);

  const handleClick = () => {
    if (isSubscribed) {
      // DELETE destroy
      // imagine this is in .then()

wasabigeek

create table expenses (
  id serial primary key,
  description varchar,
  category varchar(255),
  created_at date,
  cost decimal(2));

insert into expenses
(description, category, created_at, cost)
values

wasabigeek

[
  {
    "i": "460",
    "n": "Abomasnow"
  },
  {
    "i": "63",
    "n": "Abra"
  },
  {

wasabigeek

# run the Windows Postgres service via shell, so it only starts when you boot WSL
net.exe start postgresql-x64-9.6

wasabigeek

def validate_symbol_and_lookup(symbol):
    if not symbol:
        return apology("must provide symbol", 400)
    stock = lookup(symbol)
    if not stock:
       return apology("invalid stock symbol", 400)
    return stock

symbol = request.form.get("symbol")
# apology() doesn't get rendered if symbol is invalid

wasabigeek

<!-- /templates/app/app.html -->
<!-- replaces /templates/app/a.html and templates/app/b.html -->
<div id="reactComponent"></div>

wasabigeek

<!-- /templates/app/a.html -->
<div id="reactComponent"></div>

<!-- /templates/app/b.html -->
<div id="reactComponent"></div>