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"""Three Sum Smallest"""

def three_sum_smaller(nums, target):
	n = len(nums)
	if nums is None or n < 3:
		return 0
	result = 0
	for left in range(n - 2):
		middle = left + 1
		right = n - 1

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from datetime import datetime

"""Character Input Exercise"""

name = input("Hi there. What is your name? ")
age = input("Hey, " + name + ", how old are you? ")
year = datetime.today().year
year_at_hundred = year + (100 - int(age))
end_message = "Nice! Sounds like you will be a 100 in " + str(year_at_hundred) + "!"
print(end_message)

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"""Max Consecutive Ones II"""

def max_consecutive_ones_II(bits):
  res = max_count = 0
  counter = Counter()
	for i in range(len(bits)):
		counter[bits[i]] += 1
		maxf = max(maxf, counter[bits[i]])
		if res - maxf < 1:
			res += 1

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"""With At Most Two Distinct Characters"""

from collections import Counter
def longest_substring_count_at_most_two(s):
    counter = Counter()
    fast, max_length = 0, 0
    for lag, char in enumerate(s):
        counter[char] += 1
        while len(counter) > 2:

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Pseudocode

Node class

class Node
  **Initialize with input - value**
     value -> value
     prev -> null
     next -> null

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Notes from SO

Looping

1. If you're talking about starting over from the beginning of the for loop, there's no way to do that except "manually", for example by wrapping it in a while loop:

should_restart = True
while should_restart:
 should_restart = False

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Start With This

Before getting to React, it's helpful to know what this does generally in Javascript. Take the following snippet of code. It's written in ES6 but the principles for this predate ES6.

class Dog {
  constructor() {

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Ruby on Rails Cheatsheet

Architecture

Create a new application

Install the Rails gem if you haven't done so before

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Vanilla JavaScript Quick Reference / Cheatsheet

Just migrated it from Codepen.io to markdown. Credit goes to David Conner.

Working with DOM	Working with JS	Working With Functions
Accessing Dom Elements	Add/Remove Array Item	Add Default Arguments to Function
Grab Children/Parent Node(s)	Add/Remove Object Properties	Throttle/Debounce Functions
Create DOM Elements	Conditionals

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/*HASH TABLE - a dictionary/hash map data structure for storing key/value pairs. Finding
an entry in a hash table takes O(1) constant time(same for 10 as 1 billion items). Whereas 
finding an item via binary search takes time proportional to the logarithm of
the item in  the list O(logn). Finding an item in a regular old list takes time proportional to
the length of the list O(n). Very slow. Hash Tables = very fast  */

var makeHashTable = function(max) {

    var storage = [],
        hashTableMethods = {