javascript-arrays Flashcards
1
Q
What are arrays used for?
A
When you are working with a list or a set of values that are related to each other, especially when you do not know how many items a list will contain
2
Q
Describe array literal notation.
A
Variable keyword, array name, assignment operator, opening square brackets, values separated by commas, closing square brackets
3
Q
How are arrays different from “plain” objects?
A
They key for each value is its index number rather than name
4
Q
What number represents the first index of an array?
A
0
5
Q
What is the length property of an array?
A
Tells you how many items are in the array
6
Q
How do you calculate the last index of an array?
A
array.length - 1
