From 69dec964452c6d1a99ed02059f3c78a8a75dcb2a Mon Sep 17 00:00:00 2001 From: Zachary Kitto Date: Sat, 26 Jun 2021 00:08:00 -0400 Subject: [PATCH] All test cases are passing --- .../MathUtilities.java | 83 +++++++++++++------ .../PredicateUtilities.java | 32 +++++-- .../StringUtilities.java | 28 ++++--- .../ZipcodeRocks.java | 2 +- 4 files changed, 103 insertions(+), 42 deletions(-) diff --git a/src/main/java/com/zipcodewilmington/danny_do_better_exercises/MathUtilities.java b/src/main/java/com/zipcodewilmington/danny_do_better_exercises/MathUtilities.java index 8076dfe..a0a044e 100644 --- a/src/main/java/com/zipcodewilmington/danny_do_better_exercises/MathUtilities.java +++ b/src/main/java/com/zipcodewilmington/danny_do_better_exercises/MathUtilities.java @@ -11,7 +11,8 @@ public class MathUtilities { * @return sum of `baseValue` and `difference` */ public Integer add(int baseValue, int difference) { - return null; + + return baseValue + difference; } /** @@ -20,7 +21,8 @@ public Integer add(int baseValue, int difference) { * @return sum of `baseValue` and `difference` */ public Long add(long baseValue, long difference) { - return null; + + return baseValue + difference; } /** @@ -29,7 +31,10 @@ public Long add(long baseValue, long difference) { * @return sum of `baseValue` and `difference` */ public Short add(short baseValue, short difference) { - return null; + + int sum = baseValue + difference; + short sumAsShort = (short) sum; + return sumAsShort; } /** @@ -38,7 +43,10 @@ public Short add(short baseValue, short difference) { * @return sum of `baseValue` and `difference` */ public Byte add(byte baseValue, byte difference) { - return null; + + int sum = baseValue + difference; + byte sumAsByte = (byte) sum; + return sumAsByte; } /** @@ -47,7 +55,8 @@ public Byte add(byte baseValue, byte difference) { * @return sum of `baseValue` and `difference` */ public Float add(float baseValue, float difference) { - return null; + + return baseValue + difference; } /** @@ -56,7 +65,8 @@ public Float add(float baseValue, float difference) { * @return sum of `baseValue` and `difference` */ public Double add(double baseValue, double difference) { - return null; + + return baseValue + difference; } /** @@ -65,7 +75,8 @@ public Double add(double baseValue, double difference) { * @return difference between `baseValue` and `difference` */ public Integer subtract(int baseValue, int difference) { - return null; + + return baseValue - difference; } /** @@ -74,7 +85,8 @@ public Integer subtract(int baseValue, int difference) { * @return difference between `baseValue` and `difference` */ public Long subtract(long baseValue, long difference) { - return null; + + return baseValue - difference; } /** @@ -83,7 +95,10 @@ public Long subtract(long baseValue, long difference) { * @return difference between `baseValue` and `difference` */ public Short subtract(short baseValue, short difference) { - return null; + + int sum = baseValue - difference; + short sumAsShort = (short) sum; + return sumAsShort; } /** @@ -92,7 +107,10 @@ public Short subtract(short baseValue, short difference) { * @return difference between `baseValue` and `difference` */ public Byte subtract(byte baseValue, byte difference) { - return null; + + int sum = baseValue - difference; + byte sumAsByte = (byte) sum; + return sumAsByte; } /** @@ -101,7 +119,8 @@ public Byte subtract(byte baseValue, byte difference) { * @return difference between `baseValue` and `difference` */ public Float subtract(float baseValue, float difference) { - return null; + + return baseValue - difference; } /** @@ -110,7 +129,8 @@ public Float subtract(float baseValue, float difference) { * @return difference between `baseValue` and `difference` */ public Double subtract(double baseValue, double difference) { - return null; + + return baseValue - difference; } @@ -120,7 +140,8 @@ public Double subtract(double baseValue, double difference) { * @return division of `dividend` by `divisor */ public Integer divide(int dividend, int divisor) { - return null; + + return dividend / divisor; } /** @@ -129,7 +150,8 @@ public Integer divide(int dividend, int divisor) { * @return division of `dividend` by `divisor */ public Long divide(long dividend, long divisor) { - return null; + + return dividend / divisor; } /** @@ -138,7 +160,10 @@ public Long divide(long dividend, long divisor) { * @return division of `dividend` by `divisor */ public Short divide(short dividend, short divisor) { - return null; + + int quotient = dividend / divisor; + short quotientAsShort = (short) quotient; + return quotientAsShort; } /** @@ -147,7 +172,10 @@ public Short divide(short dividend, short divisor) { * @return division of `dividend` by `divisor */ public Byte divide(byte dividend, byte divisor) { - return null; + + int quotient = dividend / divisor; + byte quotientAsByte = (byte) quotient; + return quotientAsByte; } /** @@ -156,7 +184,8 @@ public Byte divide(byte dividend, byte divisor) { * @return division of `dividend` by `divisor */ public Float divide(float dividend, float divisor) { - return null; + + return dividend / divisor; } /** @@ -165,7 +194,8 @@ public Float divide(float dividend, float divisor) { * @return division of `dividend` by `divisor */ public Double divide(double dividend, double divisor) { - return null; + + return dividend / divisor; } @@ -175,7 +205,8 @@ public Double divide(double dividend, double divisor) { * @return product of `multiplicand` by `multiplier` */ public Integer multiply(int multiplicand, int multiplier) { - return null; + + return multiplicand * multiplier; } /** @@ -184,7 +215,7 @@ public Integer multiply(int multiplicand, int multiplier) { * @return product of `multiplicand` by `multiplier` */ public Long multiply(long multiplicand, long multiplier) { - return null; + return multiplicand * multiplier; } /** @@ -193,7 +224,9 @@ public Long multiply(long multiplicand, long multiplier) { * @return product of `multiplicand` by `multiplier` */ public Short multiply(short multiplicand, short multiplier) { - return null; + int product = multiplicand * multiplier; + short productAsShort = (short) product; + return productAsShort; } /** * @param multiplicand value to be multiplied @@ -201,7 +234,9 @@ public Short multiply(short multiplicand, short multiplier) { * @return product of `multiplicand` by `multiplier` */ public Byte multiply(byte multiplicand, byte multiplier) { - return null; + int product = multiplicand * multiplier; + byte productAsByte = (byte) product; + return productAsByte; } /** @@ -210,7 +245,7 @@ public Byte multiply(byte multiplicand, byte multiplier) { * @return product of `multiplicand` by `multiplier` */ public Float multiply(float multiplicand, float multiplier) { - return null; + return multiplicand * multiplier; } /** @@ -219,6 +254,6 @@ public Float multiply(float multiplicand, float multiplier) { * @return product of `multiplicand` by `multiplier` */ public Double multiply(double multiplicand, double multiplier) { - return null; + return multiplicand * multiplier; } } diff --git a/src/main/java/com/zipcodewilmington/danny_do_better_exercises/PredicateUtilities.java b/src/main/java/com/zipcodewilmington/danny_do_better_exercises/PredicateUtilities.java index cb5f822..56ae8c6 100644 --- a/src/main/java/com/zipcodewilmington/danny_do_better_exercises/PredicateUtilities.java +++ b/src/main/java/com/zipcodewilmington/danny_do_better_exercises/PredicateUtilities.java @@ -10,7 +10,12 @@ public class PredicateUtilities { * @return true if `x` is greater than `y` */ public Boolean isGreaterThan(int x, int y) { - return null; + if (x > y) { + return true; + } + else { + return false; + } } /** @@ -19,7 +24,12 @@ public Boolean isGreaterThan(int x, int y) { * @return true if `x` is less than `y` */ public Boolean isLessThan(int x, int y) { - return null; + if (x < y) { + return true; + } + else { + return false; + } } /** @@ -28,7 +38,12 @@ public Boolean isLessThan(int x, int y) { * @return true if `x` is greater than or equal to `y` */ public Boolean isGreaterThanOrEqualTo(int x, int y) { - return null; + if (x >= y) { + return true; + } + else { + return false; + } } /** @@ -37,7 +52,12 @@ public Boolean isGreaterThanOrEqualTo(int x, int y) { * @return true if `x` is less than or equal to `y` */ public Boolean isLessThanOrEqualTo(int x, int y) { - return null; + if (x <= y) { + return true; + } + else { + return false; + } } @@ -45,14 +65,14 @@ public Boolean isLessThanOrEqualTo(int x, int y) { * @return true */ public Boolean returnTrue() { - return null; + return true; } /** * @return false */ public Boolean returnFalse() { - return null; + return false; } } \ No newline at end of file diff --git a/src/main/java/com/zipcodewilmington/danny_do_better_exercises/StringUtilities.java b/src/main/java/com/zipcodewilmington/danny_do_better_exercises/StringUtilities.java index 2f776a9..63453fe 100644 --- a/src/main/java/com/zipcodewilmington/danny_do_better_exercises/StringUtilities.java +++ b/src/main/java/com/zipcodewilmington/danny_do_better_exercises/StringUtilities.java @@ -8,7 +8,7 @@ public class StringUtilities { * @return `Hello World` as a string */ public static String getHelloWorld() { - return null; + return "Hello World"; } /** @@ -17,7 +17,7 @@ public static String getHelloWorld() { * @return the concatenation of two strings, `firstSegment`, and `secondSegment` */ public static String concatenation(String firstSegment, String secondSegment){ - return null; + return firstSegment + secondSegment; } /** @@ -26,15 +26,15 @@ public static String concatenation(String firstSegment, String secondSegment){ * @return the concatenation of an integer, `firstSegment`, and a String, `secondSegment` */ public static String concatenation(int firstSegment, String secondSegment){ - return null; + return String.format("%s", firstSegment + secondSegment); } /** * @param input a string to be manipulated * @return the first 3 characters of `input` */ - public static String getPrefix(String input){ - return null; + public static String getPrefix(String input) { + return input.substring(0,3); } /** @@ -42,7 +42,7 @@ public static String getPrefix(String input){ * @return the last 3 characters of `input` */ public static String getSuffix(String input){ - return null; + return input.substring(input.length() - 3, input.length()); } /** @@ -51,7 +51,7 @@ public static String getSuffix(String input){ * @return the equivalence of two strings, `inputValue` and `comparableValue` */ public static Boolean compareTwoStrings(String inputValue, String comparableValue){ - return null; + return inputValue.equals(comparableValue); } /** @@ -59,7 +59,7 @@ public static Boolean compareTwoStrings(String inputValue, String comparableValu * @return the middle character of `inputValue` */ public static Character getMiddleCharacter(String inputValue){ - return null; + return inputValue.charAt((inputValue.length()-1)/2); } /** @@ -67,7 +67,7 @@ public static Character getMiddleCharacter(String inputValue){ * @return the first sequence of characters */ public static String getFirstWord(String spaceDelimitedString){ - return null; + return spaceDelimitedString.substring(0, spaceDelimitedString.indexOf(" ")); } /** @@ -75,7 +75,8 @@ public static String getFirstWord(String spaceDelimitedString){ * @return the second word of a string delimited by spaces. */ public static String getSecondWord(String spaceDelimitedString){ - return null; + String[] array = spaceDelimitedString.split(" "); + return array[1]; } /** @@ -83,6 +84,11 @@ public static String getSecondWord(String spaceDelimitedString){ * @return an identical string with characters in reverse order. */ public static String reverse(String stringToReverse){ - return null; + String result = ""; + char[] array = stringToReverse.toCharArray(); + for (int i = array.length - 1; i >= 0; i--) { + result += String.format("%s", array[i]); + } + return result; } } diff --git a/src/main/java/com/zipcodewilmington/danny_do_better_exercises/ZipcodeRocks.java b/src/main/java/com/zipcodewilmington/danny_do_better_exercises/ZipcodeRocks.java index 819f21b..fdef5bb 100644 --- a/src/main/java/com/zipcodewilmington/danny_do_better_exercises/ZipcodeRocks.java +++ b/src/main/java/com/zipcodewilmington/danny_do_better_exercises/ZipcodeRocks.java @@ -5,6 +5,6 @@ */ public class ZipcodeRocks { public static void main(String[] args) { -// System.out.println("Zipcode Rocks!"); + System.out.println("Zipcode Rocks!"); } }