What are data structures good for?

Optimizing for speed and/or memory

Making sure our data is permanent

Which is *not* true about arrays?

An array must be composed of elements of all the same data type

Arrays are iterable (meaning you can loop through them)

You can find out how many items are in an array using the .length property

Test

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1What are data structures good for?
1. AOrganizing our data
2. BEfficiently scaling
3. COptimizing for speed and/or memory
4. DMaking sure our data is permanent
2Given the array of numbers below, which number is at index 3?

var x = [2, 7, 36, 14, 6];
1. A7
2. B36
3. C14
4. D6
3Which is *not* true about arrays?
1. AArrays are iterable (meaning you can loop through them)
2. BAn array must be composed of elements of all the same data type
3. CArrays are ordered
4. DYou can find out how many items are in an array using the .length property
4Use the [blank_start]push[blank_end] method to add an item to the end of an array and the [blank_start]pop[blank_end] method to remove and return an item.
1. Apush
2. Bpop
5Which of the following methods does actually change the original array?
1. Aslice
2. Bsplice