FitMoreFish.kt

FitMoreFish.kt

//cerinta exercitiului era:
//Exercise: Fit More Fish
//Create a function that checks if we can add another fish into a tank that already has fish in it.
//How many fish in a tank?
//
//The most widely known rule for stocking a tank is the one-inch-per-fish-per-gallon-of-water rule. However that's assuming the tank doesn't have any decorations in it.
//
//Typically, a tank with decorations can contain a total length of fish (in inches) less than or equal to 80% of the tank size (in gallons). A tank without decorations can contain a total length of fish up to 100% of the tank size.
//For example:
//
//A 10 gallon tank with decorations can hold up to 8 inches of fish, for example 4 x 2-inch-long fish.
//A 20 gallon tank without decorations can hold up to 20 inches of fish, for example 6 x 1-inch-long fish and 2 x 2-inch-long fish.
//
//fitMoreFish function
//
//Create a function that takes these arguments:
//
//tankSize (in gallons)
//currentFish (a list of Ints representing the length of each fish currently in the tank)
//fishSize (the length of the new fish we want to add to the tank)
//hasDecorations (true if the the tank has decorations, false if not)
//
//You can assume that typically a tank has decorations, and that a typical fish is 2 inches long. That means you can set those values as default parameters.
//Output
//
//Make sure you test your code against the following calls, and that you get the correct output for each.
//
//canAddFish(10.0, listOf(3,3,3)) ---> false
//canAddFish(8.0, listOf(2,2,2), hasDecorations = false) ---> true
//canAddFish(9.0, listOf(1,1,3), 3) ---> false
//canAddFish(10.0, listOf(), 7, true) ---> true
//
//Your reflection
//fun fitMoreFish(tankSize: Double, currentFish: List<Int>, fishSize: Int = 2, hasDecorations: Boolean = true){
//    println("")
//}
//Things to think about
//
//Again, there are so many ways you can do this, this is one of them:
//
//fun canAddFish(tankSize: Double, currentFish: List<Int>, fishSize: Int = 2, hasDecorations: Boolean = true): Boolean {
//    return (tankSize * if (hasDecorations) 0.8 else 1.0) >= (currentFish.sum() + fishSize)
//}
//
//Notice how you can use the .sum() function in the list? This is a way to add up all elements in a list without having to use loops.


import java.util.*

fun main(args: Array<String>) {
    println("Hello, ${args[0]}!")
    feedTheFish()

   println(canAddFish(10.0, listOf(3,3,3)))
    println(canAddFish(8.0, listOf(2,2,2), hasDecorations = false))
    println(canAddFish(9.0, listOf(1,1,3), 3))
    println(canAddFish( 10.0, listOf(), 7, true))

}

fun feedTheFish(){
    val day = randomDay() //we call the function here
    val food = fishFood(day)
    println("Today is $day and the fish eat $food")
}
//de unde vin 0.8 si 1.0 ? de aici:
//Typically, a tank with decorations can contain a total length of fish (in inches) less than or equal to 80% of the tank size (in gallons). A tank without decorations can contain a total length of fish up to 100% of the tank size.
fun canAddFish(tankSize: Double,
                currentFish: List<Int>,
                fishSize: Int = 2,
                hasDecorations: Boolean = true): Boolean{
    return (tankSize * if (hasDecorations) 0.8 else 1.0) >= (currentFish.sum() + fishSize)
}
//Notice how you can use the .sum() function in the list? This is a way to add up all elements in a list without having to use loops.

fun randomDay():String {
    val week = listOf("Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday")
    return week[Random().nextInt(7)] //randomly chose index in our list
}

fun fishFood(day: String) :String {
    var food =  "fasting"
    //since EVERYTHING in kotlin has a value, when also has a value. this value will be the last expression of the branch that was picked.asa ca poti sa return direct la when, fara sa mai pui o alta variabila
    //adica nu mai tre sa pui "Monday" -> food = "flakes"
    return when (day) {
        "Monday" -> "flakes"
        "Tuesday" ->  "pellets"
        "Wednesday" ->"redworms"
        "Thursday" ->  "granules"
        "Friday" -> "mosquitoes"
        "Saturday" ->  "lettuce"
        "Sunday" -> "plankton"
        else -> "fasting"
    }
    return food
}