Echocage

Java Questions

1. Why do we hide data behind getters and setters?
2. What is the difference between an `ArrayList` and a `LinkedList`? When should you use them?
3. Explain insides of a `HashMap`
4. Explain insides of a `TreeMap`
5. Abstract class vs interface
6. Why calling public methods in a constructor is a bad practice?
7. Overriding vs overloading
8. Explain exceptions (checked/unchecked)

Echocage

class example(object):
    stuff = "nothing"


def test():
    return "Blah blah"


library = {1: "toy",
           2: "box",

Echocage

import csv

import datetime
import matplotlib.pyplot as plt

with open('brentdata.csv') as f:
    csv_data = csv.DictReader(f)
    data = list(csv_data)
    # Data now contains a list of dictionaries, each dictionary containing a line of the csv
    # Here's what the dictionary equalling one line looks like

Echocage

import random

relationships = {'Spock': {'Scissors': 'smashes', 'Rock': 'vaporizes'},
                 'Scissors': {'Paper': 'cuts', 'Lizard': 'decapitates'},
                 'Lizard': {'Paper': 'eats', 'Spock': 'poisons'},
                 'Rock': {'Lizard': 'crushes', 'Scissors': 'crushes'},
                 'Paper': {'Spock': 'disapproves', 'Rock': 'covers'}
                 }

Echocage

from urllib.request import urlretrieve
from time import sleep

import requests
from bs4 import BeautifulSoup as bs


def get_files():
    """ Gets files of specified extension through user input
    from a specified full URL path; downloads each file to

Echocage

from unittest import TestCase

from triangle import get_num_divisors


class TestGet_num_devisors(TestCase):
    def test_get_num_devisors(self):
        assert get_num_divisors(1) == 1
        assert get_num_divisors(3) == 2
        assert get_num_divisors(6) == 4

Echocage

+-----------------------+--------+---------+
|         Title         | #Jobs  | Avg.Sal |
+-----------------------+--------+---------+
|    Python Developer   | 36670  |  97992  |
|     Java Developer    | 116285 |  98014  |
|      C# Developer     | 58974  |  95915  |
|     C++ Developer     | 36950  |  97905  |
|     Ruby Developer    | 22772  |  88315  |
|     PHP Developer     | 26466  |  75204  |
|    HTML5 Developer    | 31565  |  87505  |

Echocage

>>> from requests.auth import HTTPBasicAuth
>>> auth = HTTPBasicAuth('[email protected]', 'not_a_real_password')
>>> r = requests.post(url=url, data=body, auth=auth)
>>> r.status_code
201
>>> content = r.json()
>>> print(content[u'body'])
Sounds great! I'll get right on it.

Echocage

from flask import json

import websocket


def get_bar(time, max_elements):
    return '[{}{}]'.format('|' * time, ' ' * (max_elements - time))


def on_message(ws, message):

Echocage

import random

JAPANESE_CHARACTERS = [
    ['いちまい', 'にまい', 'さんまい', 'よんまい', 'ごまい', 'ろくまい', 'ななまい', 'はちまい', 'きゅうまい', 'じゅうまい'],
    ['いっさつ', 'にさつ', 'さんさつ', 'よんさつ', 'ごさつ', 'ろくさつ', 'ななさつ', 'はっさつ', 'きゅうさつ', 'じゅさつ'],
    ['いっぽん', 'にほん', 'さんぼん', 'よんまい', 'ごまい', 'ろくまい', 'ななまい', 'はちまい', 'きゅうまい', 'じゅうまい'],
    ['ひとつ', 'ふたつ', 'みっつ', 'よっつ', 'いつつ', 'むっつ', 'ななつ', 'やっつ', 'ここのつ', 'とお']
]

answer_selections = ["a", "b", "c", "d"]