JosePedroDias

// ==UserScript==
// @name         debug cookie set
// @namespace    https://josepedrodias.com/
// @version      0.1
// @description  yada yada
// @author       jose.pedro.dias@gmail.com
// @match        https://putyoursitehere/*
// @grant        none
// ==/UserScript==

JosePedroDias

const fs = require('fs');
const readline = require('readline');

async function* readJsonlGen(filename) {
  const lineReader = readline.createInterface({
    input: fs.createReadStream(filename),
  });

  let i = 0;
  for await (const line of lineReader) {

JosePedroDias

function spy(fn, prot = fn.prototype) {
  function proxy() {
    const args = Array.prototype.slice.call(arguments);
    proxy.calls.push(args);
    proxy.called = true;
    return fn.apply(this, args);
  }

  proxy.prototype = prot;

JosePedroDias

Keybase proof

I hereby claim:

• I am josepedrodias on github.
• I am josepedrodias (https://keybase.io/josepedrodias) on keybase.
• I have a public key ASAK1PVQv74qCAcdG8fz1yGPHE1WIExSVThhfHRlFKzhfAo

To claim this, I am signing this object:

JosePedroDias

• image > scale image > 200%
• filters > edge detect > difference of gaussians > 9 / 1
• colors > desaturate
• colors > levels > push left bottom point rightwards, manipulate rightmost line to accentuate trace width wo/ much noise added

JosePedroDias

// yarn list --json > modules.json

const fs = require('fs');

const O = require('./modules.json');

function visit(o) {
  if (typeof o === 'object' && o !== null) {
    if (o instanceof Array) {
      // change array (noop)

JosePedroDias

// s1 contains all elements of s2
function setContains(s1, s2) {
  return new Set([...s2].every(x => s1.has(x)));
}

// elements in both s1 and s2
function setIntersection(s1, s2) {
  return new Set([...s1].filter(x => s2.has(x)));
}

JosePedroDias

THEME: Start with nothing

1

• there's a character with a preset script of directions he will take. We get those as an overlay
• our job is to make the hero reach somewhere in the initially empty map by adding tiles

social twist:

• if each set of movements is driven by a seed of a random number generator, we can map different solutions of the same movements to different ending maps.

JosePedroDias

jsonlines and similar formats where each payload is stored as unindented JSON chunks divided by newlines are great for complex systems.

My application is more to aid in exploring large JSON files and copying/pasting, chunks in the editor, therefore made this small JSON stringifier that breaks the 1st level of arrays and objects with newlines,while returning valid JSON.

The placement of commas is intentional. This way one can find the item, right, shift+end, copy.

jsonlishStringify([4,true,'yay'])
`[
4

JosePedroDias

JSON number limits

So we we're using an API which returns a JSON response. One of its attributes is a numeric key. Due to historical reasons we're now being served longer number (longs) so the server, which is not based on JavaScript, started returning long integers.

I had heard about issues like this but hadn't cross against a real use case before.

So what started happening on our JavaScript clients (browser and React Native alike) is that the primitive value we get back once we get the fetch json promise resolved is an overflown number.

JavaScript engines commonly have the symbol Number.MAX_SAFE_INTEGER so one can retrieve the number above which problems start to appear (it is 9007199254740991).