Practice: Planet and Spaceships Setup mkdir -p ~/workspace/csharp/exercises/lists && cd $_ dotnet new console Instructions In the Main method, place the following code
List planetList = new List(){"Mercury", "Mars"}; Add() Jupiter and Saturn at the end of the list. Create another List that contains that last two planet of our solar system. Combine the two lists by using AddRange(). Use Insert() to add Earth, and Venus in the correct order. Use Add() again to add Pluto to the end of the list. Now that all the planets are in the list, slice the list using GetRange() in order to extract the rocky planets into a new list called rockyPlanets. The rocky planets will remain in the original planets list. Being good amateur astronomers, we know that Pluto is now a dwarf planet, so use the Remove() method to eliminate it from the end of planetList. Iterating over planets Ref: List of Solar System probes
Create another list containing dictionaries. Each dictionary will hold the name of a spacecraft that we have launched, and the name of the planet that it has visited. If it visited more than one planet, just pick one. List<Dictionary<string, string>> probes = new List<Dictionary<string, string>>(); Iterate over your list of planets from above, and inside that loop, iterate over the list of dictionaries. Write to the console, for each planet, which satellites have visited which planet. foreach () // iterate planets { List matchingProbes = new List();
foreach() // iterate probes
{
/*
Does the current Dictionary contain the key of
the current planet? Investigate the ContainsKey()
method on a Dictionary.
If so, add the current spacecraft to `matchingProbes`.
*/
}
/*
Use String.Join(",", matchingProbes) as part of the
solution to get the output below. It's the C# way of
writing `array.join(",")` in JavaScript.
*/
Console.WriteLine($"{}: {}");
} Example Output in the Terminal Mars: Viking, Opportunity, Curiosity Venus: Mariner, Venera# CSharpLists