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JeevaRamanathanJeevaRamanathan
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checking lint issue
Signed-off-by: JeevaRamanathan <jeevaramanathan.m@infosys.com>
1 parent 254ac87 commit f153f33

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-51
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‎src/main/java/com/thealgorithms/strings/Isogram.java‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -17,12 +17,12 @@
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* appear multiple times ('l' appears twice in "hello", while 'r', 'm', 'g'
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* repeat
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* in "programming").
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*
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*
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* Isograms are particularly valuable in creating substitution ciphers and are
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* studied in recreational linguistics. A perfect pangram, which uses all 26
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* letters
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* of the alphabet exactly once, is a special type of isogram.
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*
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*
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* Reference from https://en.wikipedia.org/wiki/Heterogram_(literature)#Isograms
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*/
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public class Isogram {

‎src/test/java/com/thealgorithms/strings/IsogramTest.java‎

Lines changed: 24 additions & 49 deletions
Original file line numberDiff line numberDiff line change
@@ -3,9 +3,9 @@
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import java.util.stream.Stream;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.params.ParameterizedTest;
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import org.junit.jupiter.params.provider.MethodSource;
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import org.junit.jupiter.api.Test;
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public class IsogramTest {
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@@ -15,79 +15,55 @@ record IsogramTestCase(String input, boolean expected) {
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private static Stream<IsogramTestCase> isogramArrayTestData() {
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return Stream.of(
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// Valid isograms (only checks letters)
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new IsogramTestCase("uncopyrightable", true),
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new IsogramTestCase("dermatoglyphics", true),
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new IsogramTestCase("background", true),
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new IsogramTestCase("python", true),
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new IsogramTestCase("keyboard", true),
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new IsogramTestCase("clipboard", true),
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new IsogramTestCase("uncopyrightable", true), new IsogramTestCase("dermatoglyphics", true),
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new IsogramTestCase("background", true), new IsogramTestCase("python", true),
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new IsogramTestCase("keyboard", true), new IsogramTestCase("clipboard", true),
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new IsogramTestCase("flowchart", true),
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new IsogramTestCase("bankruptcy", true),
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new IsogramTestCase("computer", true),
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new IsogramTestCase("bankruptcy", true), new IsogramTestCase("computer", true),
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new IsogramTestCase("algorithms", true),
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// Not isograms - letters repeat
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new IsogramTestCase("hello", false),
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new IsogramTestCase("programming", false),
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new IsogramTestCase("java", false),
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new IsogramTestCase("coffee", false),
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new IsogramTestCase("book", false),
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new IsogramTestCase("letter", false),
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new IsogramTestCase("hello", false), new IsogramTestCase("programming", false),
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new IsogramTestCase("java", false), new IsogramTestCase("coffee", false),
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new IsogramTestCase("book", false), new IsogramTestCase("letter", false),
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new IsogramTestCase("mississippi", false),
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new IsogramTestCase("google", false),
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// Edge cases
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new IsogramTestCase("", true),
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new IsogramTestCase("a", true),
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new IsogramTestCase("ab", true),
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new IsogramTestCase("abc", true),
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new IsogramTestCase("aa", false),
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new IsogramTestCase("", true), new IsogramTestCase("a", true), new IsogramTestCase("ab", true),
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new IsogramTestCase("abc", true), new IsogramTestCase("aa", false),
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new IsogramTestCase("abcdefghijklmnopqrstuvwxyz", true), // All 26 letters
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// Case insensitive
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new IsogramTestCase("Python", true),
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new IsogramTestCase("BACKGROUND", true),
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new IsogramTestCase("Hello", false),
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new IsogramTestCase("PROGRAMMING", false));
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new IsogramTestCase("Python", true), new IsogramTestCase("BACKGROUND", true),
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new IsogramTestCase("Hello", false), new IsogramTestCase("PROGRAMMING", false));
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}
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private static Stream<IsogramTestCase> isogramLengthTestData() {
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return Stream.of(
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// Valid isograms (checks all characters)
57-
new IsogramTestCase("uncopyrightable", true),
58-
new IsogramTestCase("dermatoglyphics", true),
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new IsogramTestCase("background", true),
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new IsogramTestCase("python", true),
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new IsogramTestCase("keyboard", true),
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new IsogramTestCase("clipboard", true),
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new IsogramTestCase("uncopyrightable", true), new IsogramTestCase("dermatoglyphics", true),
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new IsogramTestCase("background", true), new IsogramTestCase("python", true),
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new IsogramTestCase("keyboard", true), new IsogramTestCase("clipboard", true),
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new IsogramTestCase("flowchart", true),
64-
new IsogramTestCase("bankruptcy", true),
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new IsogramTestCase("computer", true),
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new IsogramTestCase("bankruptcy", true), new IsogramTestCase("computer", true),
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new IsogramTestCase("algorithms", true),
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// Not isograms - characters repeat
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new IsogramTestCase("hello", false),
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new IsogramTestCase("programming", false),
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new IsogramTestCase("java", false),
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new IsogramTestCase("coffee", false),
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new IsogramTestCase("book", false),
74-
new IsogramTestCase("letter", false),
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new IsogramTestCase("hello", false), new IsogramTestCase("programming", false),
54+
new IsogramTestCase("java", false), new IsogramTestCase("coffee", false),
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new IsogramTestCase("book", false), new IsogramTestCase("letter", false),
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new IsogramTestCase("mississippi", false),
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new IsogramTestCase("google", false),
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// Edge cases
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new IsogramTestCase("", true),
80-
new IsogramTestCase("a", true),
81-
new IsogramTestCase("ab", true),
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new IsogramTestCase("abc", true),
83-
new IsogramTestCase("aa", false),
60+
new IsogramTestCase("", true), new IsogramTestCase("a", true), new IsogramTestCase("ab", true),
61+
new IsogramTestCase("abc", true), new IsogramTestCase("aa", false),
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new IsogramTestCase("abcdefghijklmnopqrstuvwxyz", true), // All 26 letters
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// Case insensitive
87-
new IsogramTestCase("Python", true),
88-
new IsogramTestCase("BACKGROUND", true),
89-
new IsogramTestCase("Hello", false),
90-
new IsogramTestCase("PROGRAMMING", false),
65+
new IsogramTestCase("Python", true), new IsogramTestCase("BACKGROUND", true),
66+
new IsogramTestCase("Hello", false), new IsogramTestCase("PROGRAMMING", false),
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// Strings with symbols and numbers
9369
new IsogramTestCase("abc@def", true), // all characters unique
@@ -132,5 +108,4 @@ void testEmptyStringByArray() {
132108
@Test
133109
void testEmptyStringByLength() {
134110
assertEquals(true, Isogram.isIsogramByLength(""));
135-
}
136-
}
111+
}

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