pchiusano

Take-home functional programming interview

This document is licensed CC0.

These are some questions to give a sense of what you know about FP. This is more of a gauge of what you know, it's not necessarily expected that a single person will breeze through all questions. For each question, give your answer if you know it, say how long it took you, and say whether it was 'trivial', 'easy', 'medium', 'hard', or 'I don't know'. Give your answers in Haskell for the questions that involve code.

Please be honest, as the interviewer may do some spot checking with similar questions. It's not going to look good if you report a question as being 'trivial' but a similar question completely stumps you.

Here's a bit more guidance on how to use these labels:

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package net.yslibrary.tumblegrid.dashboard

import android.graphics.Canvas
import android.graphics.Rect
import android.graphics.drawable.ColorDrawable
import android.support.v7.widget.RecyclerView
import android.support.v7.widget.StaggeredGridLayoutManager
import android.view.View

class StaggeredGridBorderDecoration(private val borderSize: Int,

ironic-name

fun isEmailValid(email: String): Boolean {
  return Pattern.compile(
    "^(([\\w-]+\\.)+[\\w-]+|([a-zA-Z]|[\\w-]{2,}))@"
    + "((([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\\.([0-1]?"
    + "[0-9]{1,2}|25[0-5]|2[0-4][0-9])\\."
    + "([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\\.([0-1]?"
    + "[0-9]{1,2}|25[0-5]|2[0-4][0-9]))|"
    + "([a-zA-Z]+[\\w-]+\\.)+[a-zA-Z]{2,4})$"
  ).matcher(email).matches()
}