Hidden figures challenge
The end goal of this challenge is to add all the numbers and number words together.
You get the text of a story about Maths and the name of the numbers to find:
{
"numbers":
[
"one","two","three","four","five","six",
"seven","eight","nine","ten","eleven",
"twelve"
],
"story": "Once upon a time, in the ancient land of Sumer …"
}
So, if the story would say:
The Commodore 64 was the one computer to be available to all
it's 1985 release made the three kids in our household jealous
as we couldn't afford it with a father working three shifts in
a factory.
The result we expect from your code is 2056.
64 +
"one" = 1 +
1985 +
"three" = 3
"three" = 3
=> 64 + 1 + 1985 + 3 + 3 = 2056
Solution explanation
This could be achieved in many different ways. The easiest is to use regular expressions. In JavaScript, this could be:
// Load the data
import { readFileSync, writeFileSync } from 'fs';
let storydata = readFileSync('../dataset.json', 'utf8');
// get the story and the numbers array
let story = JSON.parse(storydata).story;
let figures = JSON.parse(storydata).numbers;
// start the sum at 0
let all = 0
// get all the numbers in the story and add them to the sum
story.split(/\D+/).forEach(number => {
all += +number;
})
// loop through all the figures
figures.forEach((figure,i) => {
// count them in the story
let match = story.match(new RegExp("[a-z]?"+figure+"[a-z]?", 'gi'));
// filter out number words in other words, like "ten" in hypotenuse
match = match.filter(
v => v.toLowerCase() === figure.toLowerCase()
);
// add the count multiplied by the position in the array
all += (i+1) * count;
});
// write result to file
writeFileSync('result.json', JSON.stringify(all));
console.log(all);
The result is 2030. Would you have done it differently?