aokolish

WEB_SAFE_NUMBERS = [
  0,   # 00
  51,  # 33
  102, # 66
  153, # 99
  204, # cc
  255  # ff
]

def closest_web_safe_color(string)

aokolish

WEB_SAFE_NUMBERS = [
  0,   # 00
  51,  # 33
  102, # 66
  153, # 99
  204, # cc
  255  # ff
]

def closest_web_safe_color(string)

aokolish

# https://leetcode.com/problems/count-primes/description/

# return the number of prime numbers less than a positive number n
def count_primes(n)
  primes = []
  (2..n-1).each do |i|
    primes[i] = true
  end

  (2..Math.sqrt(n)).each do |i|

aokolish

class Solution
  def initialize
    @known_strings = {}
  end

  def word_break(string, word_dict)
    if @known_strings[string]
      return @known_strings[string]
    end

aokolish

def replace_words(dict, sentence)
  regex = /\A(#{dict.join('|')})/

  sentence.split.inject([]) do |new_words, word|
    if match_data = word.match(regex)
      new_words << match_data.captures[0]
    else
      new_words << word
    end
  end.join(' ')

aokolish

-# This file contains the 'layout' for this section of the site
%section.how-it-works-page.content-section
  .container
    .row
      .col-md-12
        %h2.section-title How It Works
    .sub-nav.row
      .col-sm-3
        = active_link_to how_we_find_kids_path, class: 'link-wrap' do
          .img.school

aokolish

class GeneratedPDF
  def generate
    # pdf stuff...

    pdf_file = Tempfile.new(['something', '.pdf'])
    pdf_file.binmode
    pdf_file.write(pdf_string)
    pdf_file
  end
end

aokolish

# rails 3, invalid times are set to nil
> m = Model.new some_timestamp: '2010-33-22T09:30:25Z'
=> #<Model ...>
> m.some_timestamp
=> nil

# rails 4, invalid times raise an exception
> m = Model.new some_timestamp: '2010-33-22T09:30:25Z'
=> ArgumentError: argument out of range

aokolish

defmodule Search do
  def chop(_val, []), do: -1

  def chop(val, [head|tail]) when tail == [] do
    if val == head, do: 0, else: -1
  end

  def chop(val, list) do
    chop(val, 0, length(list) - 1, list)
  end

aokolish

class Dependencies
  def initialize
    @dependencies = Hash.new {|h,k| h[k] = []}
  end

  def add_direct item, new_dependencies
    @dependencies[item] += new_dependencies
  end

  def dependencies_for item