himynameisdave

URL: http://skeeto.s3.amazonaws.com/share/JEOPARDY_QUESTIONS1.json.gz

The json file is an unordered list of questions where each question has

'category' : the question category, e.g. "HISTORY"

'value' : $ value of the question as string, e.g. "$200"

Note: This is "None" for Final Jeopardy! and Tiebreaker questions

himynameisdave

#!/bin/bash

# Variables (feel free to edit these)
FROM_CURRENCY='usd'
TO_CURRENCY='cad'

# Constants
USER_AGENT="User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.106 Safari/537.36"
SEARCH_URL="https://www.google.com/search?hl=en&q=$FROM_CURRENCY%20to%20$TO_CURRENCY"

himynameisdave

/*
    Naive implementation
*/
let everyonesName = '';
users.forEach(user => {
    everyonesName += `${user.firstName} ${user.lastName}\n`;
});

/*
    Better one-line-using-reduce implementation

himynameisdave

//  arrayFind accepts an array and returns a function
//  the returned function accepts the finder function
const arrayFind = arr => fn => arr.reduce((acc, item, index) => {
    //  We pass the finder function the item and the index
    if (fn(item, index)) return item;
    return acc;
});
//  Creates a finder function for just our fruits
const fruitFinder = arrayFind(fruits);
//  Now we can pass a finder function to fruitFinder (seen as `fn` above)

himynameisdave

const thisShitIsBananas = fruits.reduce((accumulator, fruit) => {
    if (fruit.name === 'bananas') return fruit;
    return accumulator
});

himynameisdave

const fruits = [
  { name: ‘apples’, quantity: 2 },
  { name: ‘bananas’, quantity: 0 },
  { name: ‘cherries’, quantity: 5 }
];
const thisShitIsBananas = fruits.reduce((accumulator, fruit) => {
    return accumulator
});

himynameisdave

const isInTwenties = user => user.age >= 20 && user.age < 30;
const makeFullName = user => `${user.firstName} ${user.lastName}`;
const isAtLeastTenChars = fullName => fullName.length >= 10;

const twentySomethingsLongFullNames = users.reduce(
  //  The first arg that .reduce takes is the reducer function
  //  It has the signature: 
  //  - `accumulator` - this is what you build up as you move through the array
  //  - `user`        - this is the reference to the item in the array we are currently on
  //  - `index`       - not used here, but you can get the index of the current place in the array you are

himynameisdave

const isInTwenties = user => user.age >= 20 && user.age < 30;
const makeFullName = user => `${user.firstName} ${user.lastName}`;
const isAtLeastTenChars = fullName => fullName.length >= 10;

const twentySomethingsLongFullNames = users.filter(isInTwenties)
                                           .map(makeFullName)
                                           .filter(isAtLeastTenChars);

himynameisdave

const twentySomethingsLongFullNames = users
      //  First we filter only the users who are in their twenties
      .filter(user => user.age >= 20 && user.age < 30)
      //  Combine first and last names
      .map(user => `${user.firstName} ${user.lastName}`)
      //  Now remove any names that are 9 or less characters
      .filter(fullName => fullName.length >= 10);

himynameisdave

const users = [
    {
        firstName: 'Bob',
        lastName: 'Doe',
        age: 37,
    }, {
        firstName: 'Rita',
        lastName: 'Smith',
        age: 21,
    }, {