objcode

/* Copyright 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

andymatuschak

A composable pattern for pure state machines with effects

State machines are everywhere in interactive systems, but they're rarely defined clearly and explicitly. Given some big blob of code including implicit state machines, which transitions are possible and under what conditions? What effects take place on what transitions?

There are existing design patterns for state machines, but all the patterns I've seen complect side effects with the structure of the state machine itself. Instances of these patterns are difficult to test without mocking, and they end up with more dependencies. Worse, the classic patterns compose poorly: hierarchical state machines are typically not straightforward extensions. The functional programming world has solutions, but they don't transpose neatly enough to be broadly usable in mainstream languages.

Here I present a composable pattern for pure state machiness with effects,

JamieCurnow

/**
 * This Gist is part of a medium article - read here:
 * https://jamiecurnow.medium.com/using-firestore-with-typescript-65bd2a602945
 */

// import firstore (obviously)
import { firestore } from "firebase-admin"

// Import or define your types
// import { YourType } from '~/@types'

paulgambill

/**
 * Retrieves all the rows in the active spreadsheet that contain data and logs the
 * values for each row.
 * For more information on using the Spreadsheet API, see
 * https://developers.google.com/apps-script/service_spreadsheet
 */
function readRows() {
  var sheet = SpreadsheetApp.getActiveSheet();
  var rows = sheet.getDataRange();
  var numRows = rows.getNumRows();

RockinPaul

In console:

git config credential.helper

You will see: osxkeychain

git config credential.helper sourcetree

Then if you perform git config credential.helper again
You will see: sourcetree

pksokolowski

class HelpDialogFragment : androidx.fragment.app.DialogFragment() {

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        return inflater.inflate(R.layout.fragment_help, null)
    }

nathansmith

Resources for learning web design & front-end development:

---

ONLINE

Design

• http://52weeksofux.com
• http://thedesigncubicle.com

yqritc

ItemOffsetDecoration

public class ItemOffsetDecoration extends RecyclerView.ItemDecoration {

    private int mItemOffset;

    public ItemOffsetDecoration(int itemOffset) {
        mItemOffset = itemOffset;
    }

schultek

import 'package:flutter/material.dart';

class NestedWillPopScope extends StatefulWidget {
  const NestedWillPopScope({
    Key? key,
    required this.child,
    required this.onWillPop,
  }) : super(key: key);

  final Widget child;

lovubuntu

Class Hasher {
  fun hash(): String {
    val bytes = this.toString().toByteArray()
    val md = MessageDigest.getInstance("SHA-256")
    val digest = md.digest(bytes)
    return digest.fold("", { str, it -> str + "%02x".format(it) })
  }
}