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const save = () => JSON.stringify(Object.keys(localStorage).reduce((acc, curr) => { acc[curr] = localStorage.getItem(curr); return acc; }, {}));

// Usage in console:
copy(save());

// new console
o = CTRL+V
restore(o);

const clean = () => { Object.keys(localStorage).forEach(k => localStorage.removeItem(k)); return true };

dzek69

When building an adnroid app, you might stumble upon this error: 

`Failed to finalize session : INSTALL_FAILED_UPDATE_INCOMPATIBLE...`. Here's how to fix it:

That's because the app you're trying to test was already installed on the device and the signatures are different now, so it's complaining. The full error will look like something like this:

`Failed to finalize session : INSTALL_FAILED_UPDATE_INCOMPATIBLE: Package com.example signatures do not match the previously installed version; ignoring!`

You can see that the package ID is `com.example`, well, simply run this command:

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new Promise((resolve) => {
    console.log("inside");
    resolve()
  }).then(() => { console.log("then") });
  console.log("outside");

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const u = (item) => {
  console.log(isNaN(item.name) === false);
  console.log(item.name !== item.name);
}

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const log = (text) => {
  if (text instanceof Error) {
    text = "ERROR: " + text.message;
  }
  document.querySelector("#log").textContent += "\n" + JSON.stringify(text, null, 4);
}

const randomTime = () => Math.round(Math.random() * 1000);

const notNull = item => item !== null;

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const React = require("react");
const { render } = require("react-dom");

const root = document.querySelector("#r");

// const log = (text) => {
//   document.querySelector("#log").textContent += "\n" + text;
// }

// const heavyCalc = () => {

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const React = require("react");
const { render } = require("react-dom");

const root = document.querySelector("#r");

const itemA = {
  key: "A",
  name: "Item A",
};
const itemB = {

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export default (number, parts) => {
    if (!parts) {
        return [];
    }

    let left = number;

    const result = [];

    const fullMin = Math.floor(number / parts);

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var measure = function(fn, iterations, timeout) {
    iterations || (iterations = 10000);
    timeout || (timeout = 5000);

    var i, end, total;
    var timeoutMsg = "";
    var start = performance.now();
    for (i = 0; i < iterations; i++) {
        fn();
        end = performance.now();