dcposch

public class Bulbs {
  public static void main(String[] args) {
    Board challenge = new Board(3);
    challenge.set(1, 0, true);

    System.out.println("CHALLENGE");
    System.out.println(challenge);

    System.out.println("SOLUTION");

dcposch

😱😱

> var s = 'hello [object Object] null undefined'
> s.indexOf([])
0
> s.indexOf({})
6
> s.indexOf(null)
22

dcposch

profiling JS array performance

what's the fastest way to make short-lived arrays in Javascript?

i need to make this array very often. variable length, from a couple to a couple thousand. i don't know each length ahead of time. i also want to minimize memory allocations.

options

dcposch

really weird macOS bug

reasonable behavior on linux

dc@dc:/tmp$ mkdir foo
dc@dc:/tmp$ echo sup > foo/1
dc@dc:/tmp$ echo dawg > foo/2
dc@dc:/tmp$ echo yo > bar
dc@dc:/tmp$ cp -r foo/ bar

dcposch

@keyframes fadein {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.app {

dcposch

// In *both* the main and renderer processes
// For example, in both main/index.js and renderer/index.js
var crashReporter = require('../crash-reporter')
crashReporter.init()

// Separately, create crash-reporter.js, shared by main and renderer:
module.exports = {
  init
}

dcposch

// In the main process, check whether the app is starting
// because the user dragged files onto the app icon
process.argv.forEach(onOpen)

// Open handlers should be added on the first tick.
// These fire if the app is already running and the user
// drags files or URLs onto the dock icon, or if they set
// the app as a handler for a file type and then open a file
app.on('open-file', onOpen)
app.on('open-url', onOpen)

dcposch

const win = new electron.BrowserWindow(...)

// When work makes progress, show the progress bar
function onProgress (progess) {
  // Use values 0 to 1, or -1 to hide the progress bar
  win.setProgressBar(progress || -1) // Progress bar works on all platforms
}

// When work completes while the app is in the background, show a badge
var numDoneInBackground = 0

dcposch

console.time('init')

// require() calls and early initialization
[...]

var state = State.getInitialState()

// `state.saved` is read from and written to a file. All other state is ephemeral. 
// First we load state.saved, once that is done, initialize the app.
loadState(init)

dcposch

console.time('init')

// require() calls and early initialization
[...]

var state = State.getInitialState()

// `state.saved` is read from and written to a file. All other state is ephemeral. 
// First we load state.saved, once that is done, initialize the app.
loadState(init)