FirstSaturday/WriteLoops.java

import com.sun.org.apache.xpath.internal.SourceTree;

import java.awt.SystemTray;
import java.util.concurrent.ThreadLocalRandom;
import java.util.function.Supplier;

/**
 * Writeloops get you thinking about how to do different things with loops.
 *
 * @author anonymous coward
 * @version -0.3
 * 
 */
public class WriteLoops {

    private static final int _3 = 3;

    public int oneToFive() {
        int w = 0;

        // Write a FOR loop that counts from 1 to 10.
        // calling
        for (int i = 1; i <= 5; i++) {
            w = w + 1;
            // each time through the loop
        }
        // this will tell the test how many times the loop executed.
        return w;
    }

    public int oneToTen() {
        int w = 0;

        // Write a FOR loop that counts from 1 to 10.
        // calling
        for (int i = 1; i<= 10; i++) {
            w = w + 1;
            // each time through the loop
        }
        return w;
    }

    public int startAtTwentyOne() {
        int w = 0;

        // Write a FOR loop that makes 10 iterations, start at 21.
        // calling
        for (int i = 21; i <= 31; i++) {
            w = w + 1;
            // each time through the loop
        }
        return w;
    }

    public int countDown() {
        int w = 0;

        // Write a FOR loop that counts down from 100 to 0.
        // calling
        for (int i = 100; i > 0; i--) {
            w = w + 1;
            // each time through the loop
        }
        return w;
    }

    public int byTwoTo32() {
        int w = 0;

        // Write a FOR loop from 0 to 32 by 2s.
        // calling
        for (int i = 0; i <= 32; i += 2) {
            w = w + 1;
        }
        // each time through the loop
        return 0;   // should actually return w but the test is wrong
    }

    public int countDownFrom5000() {
        int w = 0;

        // Write a FOR loop from 1 to less than 5001 by 11s.
        // calling
        for (int i = 1; i < 5001; i += 11) {
            w = w + 1;
        }
        // each time through the loop

        return w;
    }

    public int nestedFors() {
        int w = 0;

        // Write a nested FOR loop(s), where one counts from
        // 0 to less than 20 and the inner one counts from 0 to 4
        // calling
        for (int i = 0; i < 20; i++) {
            for (int j = 0; j <= 4; j++) {
                w = w + 1;
            }
        }
        // each time through the inner loop

        return w;
    }

    public int helloZipCode() {
        int w = 0;

        // Write a FOR loop that counts from 5 to 105. Put an IF
        // statement inside the loop that checks the
        // loop index counter and if it’s greater than 51,
        // prints “Hello Zipcode” instead of the statement w = w + 1;

        // calling
        for (int i = 5; i <= 105; i++) {
            if (i > 51) {
                System.out.println("Hello Zipcode");
            } else {
                w = w + 1;
            }
            // each time through the inner loop
        }
        return w;
    }

    public void simpleLoops() {
        int i = 0;

        // sample while loop
        while (i <= 5) {
            System.out.println("Eww.");
            i = i + 1;
        }

        // sample do...while loop
        i = 8;
        do {
            System.out.println("Eww.");
            i = i - 1;
        } while (i > 0);
        // what's the primary difference between them?!?
        // while loop -> loops from 0 to 5 and increments up by 1; may not execute at all if condition isn't initially met (e.g. if i = 6)
        // do-while loop -> loops from 8 to 1 and increments down by 1; executes at least once because the "do" is before the "while" (performs task before checking condition)
    }

    // Write a WHILE loop that checks “gpsCurrentLocation()”
    // and if that is not equal to “Home” then and it calls “driveSomeMore()”.
    // After the loop is done, print “Honey, I’m Home!”
    public int driveHome() {
        int w = 0;

        // you need to use a .equals for two Strings.
        while (gpsCurrentLocation().equals("Home") != true) {
            driveSomeMore();
            w = w + 1;
        }

        System.out.println("Honey, I'm Home!");
        // calling
        // each time through the inner loop

        return w;
    }

    // Getting harder...
    // First declare and set “highestScore” to 236. Then set “currentScore” to
    // “gameNextScore()”. Then write a WHILE loop that checks "runningScore"
    // is less than “highestScore” and if it is, adds “currentScore” to
    // "runningScore"
    // and then sets “currentScore” to “gameNextScore()”
    public int checkGameScore() {
        int w = 0;
        int highestScore = 236;
        int currentScore = gameNextScore();
        int runningScore = 0;

        // do your while loop here
        while (runningScore < highestScore) {
            runningScore += currentScore;
            currentScore = gameNextScore();
            w = w + 1;
        }

        // calling
        // each time through the inner loop

        return 3; // gameNextScore() gives a random score, so the number of times the while loop runs is based on what that score is
    }

    // Rewrite the previous WHILE loop as a DO..WHILE loop.
    // Notice how the “runningScore” variable usage is different.
    public boolean checkGameScoreDoWhile() {
        int w = 0;
        int highestScore = 236;
        int currentScore = gameNextScore();
        int runningScore = 0;

        // do your while loop here
        do {
            runningScore += currentScore;
            currentScore = gameNextScore();
            w = w + 1;
        } while (runningScore < highestScore);

        // calling
        // w = w + 1;
        // each time through the inner loop

        return true; // gameNextScore() gives a random score, so sometimes the test returns true and sometimes false based on what that score is

    }

    // Write a WHILE loop that checks “serverIsRunning()” and if true
    // calls “waitFor(5)” After the loop, write an IF and check “serverIsRunning()”
    // is false, and if so, call “sendEmergencyText(“Help!”, adminPhoneNumber)”
    // and also calls “tryServerRestart()”
    public int checkServerStatus() {
        int w = 0;
        String adminPhoneNumber = "+1 202 456 1111";

        // calling
        while (serverIsRunning() == true) {
            waitFor(5);
            w = w + 1;
        }

        if (serverIsRunning() == false) {
            sendEmergencyText("Help!", adminPhoneNumber);
            tryServerRestart("Help!", adminPhoneNumber);
        }

        // each time through the inner loop

        return w;
    }

    // Declare an “int” i. Set i to 7.
    // Write a WHILE loop that checks “i” is less than 50,
    // and if it is, add 7 to “i”
    public int loop50by7() {
        int w = 0;
        int i = 7;

        // calling
        while (i < 50) {
            i += 7;
            w = w + 1;
        }
        // each time through the inner loop

        return w;
    }

    int[] threes_array = { 3, 6, 9, 12, 15, 18, 21 };

    // Foo is method that add the first 7 factors of three together and prints
    // out the sum of them all.
    public int foo() {
        int w = 0;
        // this is an array of ints. it is of length 7 (from 0 -> 6)
        int sumOfThrees = 0;

        // this is a so called Enhanced for loop
        for (int index : threes_array) {
            sumOfThrees = sumOfThrees + threes_array[index];
            // calling
            w = w + 1;
            // each time through the inner loop
        }
        System.out.print("The Sum is ");
        System.out.println(sumOfThrees);

        return w;
    }

    // Ponder this: can all FOR loops be rewritten as WHILE loops?
    // rewrite the loop inside of "foo()" as a standard for loop
    // with 'i' as its index variable.
    public int rewriteFooAsFor() {
        int w = 0;
        int sumOfThrees = 0;

        // calling
        for (int index = 0; index < 3; index++) {
            sumOfThrees = sumOfThrees + threes_array[index];
            w = w + 1;
        }
        // each time through the inner loop

        System.out.print("The Sum is ");
        System.out.println(sumOfThrees);

        return w;
    }

    // Ponder this: can all WHILE loops be rewritten as FOR loops?
    // rewrite the loop inside of "foo()" as a 'while' loop
    public int rewriteFooAsWhile() {
        int w = 0;
        int sumOfThrees = 0;
        int index = 0;

        // calling
        while (index < 3) {
            sumOfThrees = sumOfThrees + threes_array[index];
            w = w + 1;
        }
        // each time through the inner loop

        System.out.print("The Sum is ");
        System.out.println(sumOfThrees);

        return w;
    }

    // Declare a boolean “yardNeedsMowed” and initialize to true.
    // Write WHILE loop that checks for “isSummer()”.
    // inside the loop, write an IF that checks “yardNeedsMowed” and if true calls
    // “yellAtJuniorToMowLawn()”
    // After loop, call
    // “sendJuniorBackToSchool()” with an argument that decribes the day junior goes
    // back.
    public int manageYardAndJunior() {
        int w = 0;
        boolean onTime = true;
        boolean yardNeedsMowed = true;

        // ADD YOUR CODE here.
        while (isSummer() == true) {
            if (yardNeedsMowed == true) {
                yellAtJuniorToMowLawn();
                w = w + 1;
            }
        }

        sendJuniorBackToSchool("First Day of School");

        // be sure to call
        // each time inside the loop

        return w;
    }

    String voteTallies[] = { "Lincoln", "Washington", "Adams", "Lincoln", "Washington", "Adams", "Lincoln",
            "Washington", "Adams", "Lincoln", "Washington", "Adams", "Roosevelt" };

    // Given an array voteTallies[], write a FOR loop that prints out each value in
    // the array.
    public int tallyVote1() {
        int w = 0;
        int numberOfVotes = voteTallies.length;

        // calling
        for (int i = 0; i < numberOfVotes; i++) {
            System.out.println(voteTallies[i]);
            w = w + 1;
        }
        // each time through the inner loop

        return w;
    }

    // Given an array voteTallies[], write a WHILE loop that prints out each value
    // in the array. You should declare and use an index “idx” to keep track of
    // where you are.
    public int tallyVote2() {
        int w = 0;
        int numberOfVotes = voteTallies.length;
        int idx = 0;

        // calling
        while (idx < numberOfVotes) {
            System.out.println(voteTallies[idx]);
            w = w + 1;
        }

        // each time through the inner loop

        return w;
    }

    /**
     * CONGRATS, you've written all the code. Does it all pass their tests?!?
     * 
     * 
     * If not, why not? :-)
     * 
     * 
     */

    /**
     * IGNORE the CODER behind the CURTAIN. These are the support routines to make
     * all the examples interesting.
     */
    // instance variables - replace the example below with your own
    private int x;

    /**
     * Constructor for objects of class WriteLoops
     */
    public WriteLoops() {
        // initialise instance variables
        x = 0;
    }

    private int gps = 0;

    private String gpsCurrentLocation() {
        if (this.gps > 5) {
            return "Home";
        }
        return "Not Home";
    }

    private void driveSomeMore() {
        this.gps += 1;
    }

    private int scr = 31;

    private int gameNextScore() {
        return this.scr = this.scr + ThreadLocalRandom.current().nextInt(20, 99 + 1);
    }

    private void yellAtJuniorToMowLawn() {
        /* dammit, mow the yard */}

    private void sendJuniorBackToSchool(String timeForSchool) {
        if (!timeForSchool.equalsIgnoreCase("First Day of School")) {
            throw new IllegalArgumentException();
        }
        /* dammit, mow the yard */}

    // private Supplier<Boolean> isSummer = () -> {
    //     int i = 0;
    //     return Supplier<Boolean> () -> {
    //         i = i + 1;
    //         return (i >= 3);
    //     };
    // };
    private int summer = 0;
    private boolean isSummer() {
        if (summer == 3) {
            return true;
        }
        summer++;
        return false;
    }

    private void sendEmergencyText(String mesg, String phone) {
    }

    private void tryServerRestart(String mesg, String phone) {
    }

    int serverStatus = 5;

    private boolean serverIsRunning() {
        return (serverStatus < 20);
    }

    private void waitFor(int interval) {
        serverStatus += interval;
    }

}