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 (75 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: The drop method will remove the amount of elements you decide from the beginning of an array.

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

• In your own words, what does the Ruby array push method do? As you're explaining, be sure to provide an example. Your answer: The push method will push an element to the end of an array. For example if you have the array vowels = [ "A", "E", "I"] and do vowels.push("O").push("U") you should get vowels = [ "A", "E", "I", "O", "U"]

• What did you Google to help you with this task, and how did you pick your results? I searched "ruby documentation push method" without the quotes, and decided to use ruby's actual documentation page as it should have up to date information.

• In your own words, what does the Ruby string split method do? As you're explaining, be sure to provide an example. Your answer: The split method will split up a string into individual strings based on a space. For example. "I love to eat tacos".split will yield you ["I", "love", "to", "eat", "tacos"]

• What did you Google to help you with this task, and how did you pick your results? I didn't google this time as I already had up Ruby's documentation page and just looked up #split within it.

• 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 seems to remove a number of elements within an array from the beginning. If you have an array days = ["Monday", "Tuesday", Wednesday", "Thursday", "Friday", "Saturday", "Sunday"] and do console.log(days.slice(3)) your expected output should be days = ["Thursday", "Friday", "Saturday", "Sunday"]

• What did you Google to help you with this task, and how did you pick your results? I searched "JavaScript array slice method" without the quotes and decided to use Mozillas page as it was mentioned in session 2.

• In your own words, what does the JavaScript object values method do? As you're explaining, be sure to provide an example. Your answer: Values method will output an objects values in an array for you to see. Example: const pizzaSize = { personal: "8in" small: "12in" medium: "16in" large: "20in" }

console.log(Object.values(pizzaSize)); //Your output will be: Array ["8in", "12in", 16in", "20in"]

• What did you Google to help you with this task, and how did you pick your results? I searched "JavaScript object values method" and found the Mozilla documentation page mentioned in session two.

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: Battleship

• 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: "Hit", "Miss"
2. Integer and/or float data: Life = 100, Damage = 0
3. Boolean data: Your turn? True/False, Were you hit? True/False
4. Array data: Your position on the board = [A0, B0], Your fleet = ["carrier", "battleship", "cruiser", "submarie", "destroyer"]
5. Hash or Object data: Fleet = { "carrier": 5, "battleship": 4, "cruiser": 3, "submarine": 3, "destroyer": 2 }

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.

• Checking out library materials. You repeat the same task of scanning an item until all your items are checked out to you. It's a repeated process

• Graded assignments that you want in order from least to greatest. You check each grade to the next and place them in their proper order.

• Shopping online. When you have a cart with items and are ready to checkout the cart will iterate through each items price to give you a total.

• 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.

4. 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: