Cartoon Collections Lab
Last updated
Last updated
Get familiar iterating through arrays with enumerator methods like .collect
or .map
, .find
, and .include?
.
Build methods and control their return values.
Practice control flow with if
and else
statements.
There are four methods to complete in this lab:
roll_call_dwarves
summon_captain_planet
long_planeteer_calls
find_the_cheese
roll_call_dwarves
This method should accept an array of dwarf names, for instance:
It should then print out each name, in number order, using puts
. The print-out should look like this:
Doc
Dopey
Bashful
Grumpy
Look into the each_with_index
method.
Once the test for this method is passing, move on to the next method.
summon_captain_planet
This method should accept an array argument of planeteer calls that will look like this:
It should then capitalize each element and add an exclamation point at the end. The return value of this method should be an array, in this example:
The .map
or .collect
method might be appropriate for this task, take a look at it here and here.
Once the test for this method is passing, move on to the next method, long planeteer calls.
long_planeteer_calls
The long_planeteer_calls
method should accept an array of calls. The method should tell us if any of the calls are longer than four characters. For example:
Notice the return value of this method is either true
or false
, depending on the array it was given as an argument.
Checkout the Ruby docs on arrays for a hint.
Once the test for this method is passing, move on to the last method.
find_the_cheese
The find_the_cheese
method should accept an array of strings. It should then look through these strings to find and return the first string that is a type of cheese. The types of cheese that appear are "cheddar"
, "gouda"
, and "camembert"
.
For example:
If, sadly, a list of ingredients does not include cheese, return nil
:
You can assume that all strings will be lowercase. Take a look at the .include
method for a hint. This method asks you to return a string value instead of printing it so keep that in mind.
The .map
method
The .include
method
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