Session 2 Practice Tasks

The assignments listed here should take you approximately 2 hours.

To start this assignment, click the button in the upper right-hand corner that says Fork. This is now your copy of the document. Click the Edit button when you're ready to start adding your answers. To save your work, click the green button in the bottom right-hand corner. You can always come back and re-edit your gist.

1. Documentation and Googling (60 min)

Documentation of a langauge, framework, or tool is the information that describes its functionality. For this part of the practice tasks, you're going to practice digging into documentation and other reference material.

NOTE: The linked documentation for each question below is a good starting place, but you should also be practicing your Googling skills and sifting through the results to find relevant and helpful sites.

• In your own words, what does the Ruby array drop method do? As you're explaining, be sure to provide an example. Your answer:

It removes the specified number of items from an array, starting from the beginning. Example Array [1,2,3,4,5] drop 1 returns [2,3,4,5]

• What did you Google to help you with this task, and how did you pick your results?

I read the official documentation.

• In your own words, what does the Ruby string split method do? As you're explaining, be sure to provide an example. Your answer:

It breaks a string apart based on a choose character, phrase, or other delimiter. String example “I ran around the house” could be split by a space and it would return the string as: “I”, “ran”, “around”, “the”, “house”

• What did you Google to help you with this task, and how did you pick your results?

split string ruby I went through the first 4 results until I found a simple explanation and example

• In your own words, what does the JavaScript array slice method do? As you're explaining, be sure to provide an example. Your answer: Slice returns a new array and does not edit/touch the original array from the specified position. [1, 2, 3, 4, 5] slice 1 > [2, 3, 4, 5]
• What did you Google to help you with this task, and how did you pick your results? Read the documentation.

2. Data Types (15 min)

Imagine that you're taking your favorite board game and turning it into a computer-based game.

• Name of board game: Risk

• Use the space below to categorize game data into each of the following data types. You should have a minimum of two pieces of data for each category.

1. String data: "Country Names", "Piece Names"
2. Integer and/or float data: numberUnits = 7, players = 4, diceResults = 12
3. Boolean data: Has correct number of cards for a turn in correctCards = True, playerOneControlsAustrilia = True
4. Array data: var countriesHeld = ["Serbia","Russia","Cyrpus"], var countriesPlayer = [5,15,20,40]
5. Hash or Object data: Var Player = "Matt", var countriesHeld = ["Serbia","Russia","Cyrpus"]

3. Iteration (30 min)

• Create a list below of three real-life situations where iteration is used. For each situation, explain why it would be an example of iteration.

• Making Perogies. If dough is available and filling available, fill dough, fold, place aside.

• Packing Envelopes, if addressed envelopes left and invitations available. Place invite in envelope seal. Repeat.

• Reading book, if pages left read next page.

• Create a list below of three programming situations where iteration would be used. For each situation, explain why it would be an example of iteration.

• Displaying names of players in a video game. You would go through the array of players and display them on the screen.

• Playing through songs on a digital album until the end. Array of song, playing each one until there are none left.

• Playing through episodes in a series on Netflix. Array of shows in a series playing until user breaks loop or there are not more episodes.

4. Identifying Mistakes (15 min)

The following code examples each contain a mistake. Describe the problem for each.

Original	Mistakes	Problem
students.each do |student|   puts "Welcome, #{student}" end	students.each do |student|   puts "Welcome, #(student)" end	The problem is...
.main-content {   font-size: 12px;   border: 3px solid black;   font-family: sans-serif; }	.main-content {   font-size: 12px;   border: 3px solid black;   font-family: sans serif; }	The problem is...
log(2, (1022 * ((score - min(score) over ()) / ((max(score) over ()) - (min(score) over ()))) + 2)::numeric)	log(2, (1022 * ((score - min(score) over ()) / ((min(score) over ()) - (min(score) over ()))) + 2)::numeric)	The problem is...
arr.product(arr).reject { |a,b| a == b }.any? { |a,b| a + b == n }	arr.product(arr).reject { |a,b| b == b }.any? { |a,b| a + b == n }	The problem is...
class Cat   attr_reader :color, :name   def initialize(data)     @name = data[:name]     @color = data[:color]   end end	class Cat   attr_reader :color, :name   def intialize(data)     @name = data[:name]     @color = data[:color]   end end	The problem is...

1. Incorrect bracketing.
2. Incorrect font name missing dash.
3. Min replaces max for the score being subtracted from.
4. a == b is correct and b is equal to itself in mistake.
5. initialize is typed incorrectly in mistake.

5. Modify your Bash Profile (10 min)

• Watch this video and follow each step to modify your own bash profile. As mentioned in the video, you will need this snippet below:

# get current branch in git repo
function parse_git_branch() {
  BRANCH=`git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/'`
  if [ ! "${BRANCH}" == "" ]
  then
    STAT=`parse_git_dirty`
    echo "[${BRANCH}${STAT}]"
  else
    echo ""
  fi
}

# get current status of git repo
function parse_git_dirty {
  status=`git status 2>&1 | tee`
  dirty=`echo -n "${status}" 2> /dev/null | grep "modified:" &> /dev/null; echo "$?"`
  untracked=`echo -n "${status}" 2> /dev/null | grep "Untracked files" &> /dev/null; echo "$?"`
  ahead=`echo -n "${status}" 2> /dev/null | grep "Your branch is ahead of" &> /dev/null; echo "$?"`
  newfile=`echo -n "${status}" 2> /dev/null | grep "new file:" &> /dev/null; echo "$?"`
  renamed=`echo -n "${status}" 2> /dev/null | grep "renamed:" &> /dev/null; echo "$?"`
  deleted=`echo -n "${status}" 2> /dev/null | grep "deleted:" &> /dev/null; echo "$?"`
  bits=''
  if [ "${renamed}" == "0" ]; then
    bits=">${bits}"
  fi
  if [ "${ahead}" == "0" ]; then
    bits="*${bits}"
  fi
  if [ "${newfile}" == "0" ]; then
    bits="+${bits}"
  fi
  if [ "${untracked}" == "0" ]; then
    bits="?${bits}"
  fi
  if [ "${deleted}" == "0" ]; then
    bits="x${bits}"
  fi
  if [ "${dirty}" == "0" ]; then
    bits="!${bits}"
  fi
  if [ ! "${bits}" == "" ]; then
    echo " ${bits}"
  else
    echo ""
  fi
}

export PS1="\u\w\`parse_git_branch\`$ "

5. Questions/Comments/Confusions

If you have any questions, comments, or confusions from the any of the readings that you would an instructor to address, list them below: