Designing solutions through programming - October 14 2016 Lesson Notes

What are we going to learn today?[edit]

Today in class we will start learning about collections and arrays. THESE ARE DIFFERENT.
If using weapons as array examples offends you, please use this potion list as an alternative.

<?php


$player_inventory = array
    (
    "sword",
    "shield",
    "armour",
    "potion of healing",
    "amulet"
    );

echo "You are currently carrying:<br /> ";

for ($i=0; $i < count($player_inventory); $i++)

{

    echo $player_inventory[$i] . "<br />";

}

# here is where we add an item to our array: 


array_push($player_inventory, "magic ring", "wand");

# now let's look at the new inventory: 

echo "<br />This is the new inventory, after we have pushed the new items to the end of the array<br /> ";
for ($i=0; $i < count($player_inventory); $i++)

{

    echo $player_inventory[$i] . "<br />";

}


# now we will use common access methods: 

echo "<br />Below we see how common access methods work.<br /><br />";
echo "The index is CURRENTly pointing at:  " . current($player_inventory);
echo "<br />";
echo "The NEXT index (relative to the current index) is: " . next($player_inventory);
echo "<br />";
echo "The index is now CURRENTly pointing at: " . current($player_inventory);
echo "<br />";
echo "The previous index is: " . prev($player_inventory);
echo "<br />";
echo "The current index is: " . current($player_inventory);
echo "<br />";
echo "The last element in the list is " . end($player_inventory);
echo "<br />";
echo "The current element is: " . current($player_inventory);
echo "<br />";
echo "The first element in the list is: " . reset($player_inventory);
 
?>

Homework[edit]

Please review our page about collections and arrays

How am I being assessed today?[edit]

You will be formatively assessed in class today

Standards we are covering today[edit]

Describe the characteristics and applications of a collection.
Construct algorithms using the access methods of a collection.
Click here for all our standards

As a computer scientist, you have:[edit]

Confidence in dealing with complexity
Persistence in working with difficult problems
Tolerance for ambiguity
The ability to deal with open-ended problems
The ability to communicate and work with others to achieve a common goal or solution

Credits[edit]

Icons used with tremendous gratitude by Freepik from flaticon