yitonghe00

// Note that it's skipping spaces to the next valid expression
function skipSpace(string) {
  let spacesAndComments = string.match(/^(\s|#.*)*/);
  return string.slice(spacesAndComments[0].length);
}

console.log(parse("# hello\nx"));
// → {type: "word", name: "x"}

console.log(parse("a # one\n   # two\n()"));

yitonghe00

// Represent Egg arrays with JavaScript arrays

topScope.array = (...elements) => {
  return elements;
};

topScope.length = (array) => {
  return array.length;
};

yitonghe00

function Promise_all(promises) {
  return new Promise((resolve, reject) => {
    const array = [];
    
    const promiseHelper = (promises) => {
      if (promises.length === 0) {
      	resolve(array); // return array;
      }
      
      promises[0]

yitonghe00

async function locateScalpel(nest) {
  let curr = nest.name;
  let next = await anyStorage(nest, curr, "scalpel");

  while (next !== curr) {
    curr = next;
    next = await anyStorage(nest, curr, "scalpel");
  }

  return curr;

yitonghe00

// Add dependencies and exports
(require, exports, module) => {
	const {buildGraph} = require("./graph");

    const roads = [
      "Alice's House-Bob's House",   "Alice's House-Cabin",
      "Alice's House-Post Office",   "Bob's House-Town Hall",
      "Daria's House-Ernie's House", "Daria's House-Town Hall",
      "Ernie's House-Grete's House", "Grete's House-Farm",
      "Grete's House-Shop",          "Marketplace-Farm",

yitonghe00

// Fill in this regular expression.
let number = /^[+-]?(\d+\.?\d*|\.\d+)(E[+-]?\d+)?$/i;
console.log(/\d/.test("."));

// Tests:
for (let str of ["1", "-1", "+15", "1.55", ".5", "5.",
                 "1.3e2", "1E-4", "1e+12"]) {
  if (!number.test(str)) {
    console.log(`Failed to match '${str}'`);
  }

yitonghe00

let text = "'I'm the cook,' he said, 'it's my job.'";
// Change this call.
console.log(text.replace(/(^|\W)'|'(\W|$)/g, '$1"$2'));
console.log(text.replace(/(^|\W)'/g, '$1"')); //Working as well due to the punctuation??
// → "I'm the cook," he said, "it's my job."

yitonghe00

// Fill in the regular expressions

verify(/ca[rt]/,
       ["my car", "bad cats"],
       ["camper", "high art"]);

verify(/pr?op/,
       ["pop culture", "mad props"],
       ["plop", "prrrop"]);

yitonghe00

const box = {
  locked: true,
  unlock() { this.locked = false; },
  lock() { this.locked = true;  },
  _content: [],
  get content() {
    if (this.locked) throw new Error("Locked!");
    return this._content;
  }
};

yitonghe00

class MultiplicatorUnitFailure extends Error {}

function primitiveMultiply(a, b) {
  if (Math.random() < 0.2) {
    return a * b;
  } else {
    throw new MultiplicatorUnitFailure("Klunk");
  }
}