day_19.js

// Resistor Color map
// Instructions
// If you want to build something using a Raspberry Pi, you'll probably use resistors. For this exercise, you need to know two things about them:

// Each resistor has a resistance value.
// Resistors are small - so small in fact that if you printed the resistance value on them, it would be hard to read.
// To get around this problem, manufacturers print color-coded bands onto the resistors to denote their resistance values. Each band has a position and a numeric value.

// The first 2 bands of a resistor have a simple encoding scheme: each color maps to a single number.

// In this exercise you are going to create a helpful program so that you don't have to remember the values of the bands.

// These colors are encoded as follows:

// Black: 0
// Brown: 1
// Red: 2
// Orange: 3
// Yellow: 4
// Green: 5
// Blue: 6
// Violet: 7
// Grey: 8
// White: 9
// The goal of this exercise is to create a way:

// to look up the numerical value associated with a particular color band
// to list the different band colors
// Mnemonics map the colors to the numbers, that, when stored as an array, happen to map to their index in the array: Better Be Right Or Your Great Big Values Go Wrong.

// NOTE
// Although the color names are capitalised in the description, the function colorCode will always be called with the lowercase equivalent, e.g brown instead of Brown.

const colorCode = (color) => {
	// Code here
    let arr = ['black','brown','red','orange','yellow','green','blue','violet','grey','white'];
    let code = arr.indexOf(color);
	return code;
}

console.log(colorCode('blue'));
console.log(colorCode('white'));