Review

Description

This was a one hour review to do a skills assesment on Ruby. The reviewer would propose a question and give me an hour to try and solve this porblem. I was allowed to use the internet to help solve the issue should I require it

Company - Digital audio

Musician writing electronic music need there soundtrack changed, using a music filter to change the audio. Create a band pass filter.

Band pass filter

• Takes an input track
• Filters out frequencies that are above and below the information
• Input track comes in as an array of integers
• Each integer represents a single frequency with the soundwave
• If the frequency in the soundwave is below the lower threshold then the soundwave change to match this value
• If the frequency in the soundwave is above the higher threshold then the soundwave change to match this value
• Client would like a default of an lower limit of 40 and an upper limit of 1000

Example from the client

• [10, 20, 30, 40, 50, 60], 25, 45 => [25, 25, 30, 40, 45, 45]

Inputs and outputs

• [30],25,45 => 30
• [20],25,45 => 25
• [60],25,45 => 45
• [20,60],25,45 => 25,45
• [10, 20, 30, 40, 50, 60], 25, 45 => [25, 25, 30, 40, 45, 45]
• [],25,45 => no input supplied
• [null],25,45 => raise error