Big ideas: Lists

Big ideas: Lists

Some big ideas:

• lists are used to hold collections of variables

• list help organize variables that can be accessed through the list's index

• javaScript has built-in functions that allow you to add, remove, and replace items

Multiple Choice

What is the error in line 10?

• pizza is not a pet

• quotation marks should not have been used

• you can only have 3 elements in a list

• you need to replace the parenthesis with a square bracket

Multiple Choice

Which line of code will print bear to the console?

• console.log(animals[4)];

• console.log(animals[3)];

• console.log(animals[5)];

Multiple Choice

Give the pictured list, what will the variable numOfAns get?

numOfAns = animals.length;

• 3

• 4

• 5

• 6

Multiple Select

Let's say you have declared the following empty list:

var evenNumbers = [];

Which lines of code will add an item to the list?

• evenNumbers = 5;

• appendItem(evenNumbers, 5);

• evenNumbers[0] = 5;

Multiple Choice

what value is given to letter?

var month = "December"

var letter = month[5];

• c

• e

• m

• b

Multiple Choice

What happens when the rightButton is clicked twice?

var colors["yellow", "red", "blue"];

var index = 0;

onEvent("rightButton", "click", function( ) {

colors[index + 1];

}

• move to yellow in the list

• move to red in the list

• move to blue in the list

• move out of bounds

Multiple Choice

Consider the following code:

[1]: var colors = ["yellow", "red", "blue"];

[2] removeItem(colors, 0);

[3] appendItem (colors, "purple");

[4] insertItem(2, "yellow");

• ["red", "blue", "purple"]

• ["red", "purple","blue", "yellow"]

• ["red", "yellow", "blue","purple"]

• ["red", "blue", "yellow", "purple"]