Beginner Exercism • javascript

Resistor Color Trio

Challenge Overview

If you want to build something using a Raspberry Pi, you'll probably use _resistors_. For this exercise, you need to know only three things about them:

Source: Exercism javascript/resistor-color-trio

💡 View Solution

export const COLORS = ["black","brown","red","orange","yellow","green","blue","violet","grey","white"];
export const decodedResistorValue = ([c1, c2, c3]) => {
  let val = (COLORS.indexOf(c1) * 10 + COLORS.indexOf(c2)) * (10 ** COLORS.indexOf(c3));
  let unit = 'ohms';
  if (val >= 1000) {
    val /= 1000;
    unit = 'kiloohms';
  }
  return `${val} ${unit}`;
};