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Commit278e1c5

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update 784
1 parent1bcd012 commit278e1c5

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3 files changed

+69
-26
lines changed

3 files changed

+69
-26
lines changed

‎build.gradle

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Original file line numberDiff line numberDiff line change
@@ -27,6 +27,7 @@ dependencies {
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compile'junit:junit:4.13'
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compilegroup:'org.apache.commons',name:'commons-collections4',version:'4.0'
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testCompilegroup:'junit',name:'junit',version:'4.13'
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testCompile("org.assertj:assertj-core:3.11.1")
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compileOnly'org.projectlombok:lombok:1.18.12'
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annotationProcessor'org.projectlombok:lombok:1.18.12'

‎src/main/java/com/fishercoder/solutions/_784.java

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Original file line numberDiff line numberDiff line change
@@ -42,4 +42,39 @@ public List<String> letterCasePermutation(String S) {
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returnnewArrayList<>(result);
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}
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}
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publicstaticclassSolution2 {
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/**
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* My completely original solution on 10/11/2021.
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*/
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publicList<String>letterCasePermutation(Strings) {
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List<String>ans =newArrayList<>();
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ans.add("");
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returnrecursion(s,ans,0);
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}
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privateList<String>recursion(Strings,List<String>ans,intstart) {
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if (start >=s.length()) {
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returnans;
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}
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List<String>newList =newArrayList<>();
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intindex =start;
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while (start <s.length() &&Character.isDigit(s.charAt(start))) {
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start++;
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}
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Stringdigits ="";
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if (start >index) {
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digits =s.substring(index,start);
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}
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for (Stringstr :ans) {
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if (start <s.length()) {
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newList.add(str +digits +Character.toUpperCase(s.charAt(start)));
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newList.add(str +digits +Character.toLowerCase(s.charAt(start)));
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}else {
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newList.add(str +digits);
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}
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}
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returnrecursion(s,newList,start +1);
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}
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}
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}
Lines changed: 33 additions & 26 deletions
Original file line numberDiff line numberDiff line change
@@ -1,37 +1,44 @@
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packagecom.fishercoder;
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importcom.fishercoder.solutions._784;
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importjava.util.Arrays;
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importjava.util.List;
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importorg.junit.BeforeClass;
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importorg.junit.Test;
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importstaticorg.junit.Assert.assertEquals;
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importstaticorg.assertj.core.api.Assertions.assertThat;
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publicclass_784Test {
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privatestatic_784.Solution1solution1;
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privatestaticList<String>expected;
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@BeforeClass
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publicstaticvoidsetup() {
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solution1 =new_784.Solution1();
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}
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@Test
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publicvoidtest1() {
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expected =Arrays.asList("a1b2","a1B2","A1b2","A1B2");
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assertEquals(expected,solution1.letterCasePermutation("a1b2"));
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}
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@Test
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publicvoidtest2() {
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expected =Arrays.asList("3z4","3Z4");
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assertEquals(expected,solution1.letterCasePermutation("3z4"));
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}
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@Test
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publicvoidtest3() {
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expected =Arrays.asList("12345");
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assertEquals(expected,solution1.letterCasePermutation("12345"));
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}
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privatestatic_784.Solution1solution1;
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privatestatic_784.Solution2solution2;
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privatestaticList<String>expected;
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@BeforeClass
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publicstaticvoidsetup() {
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solution1 =new_784.Solution1();
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solution2 =new_784.Solution2();
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}
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@Test
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publicvoidtest1() {
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expected =Arrays.asList("a1b2","a1B2","A1b2","A1B2");
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assertThat(expected).hasSameElementsAs(solution1.letterCasePermutation("a1b2"));
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assertThat(expected).hasSameElementsAs(solution2.letterCasePermutation("a1b2"));
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}
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@Test
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publicvoidtest2() {
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expected =Arrays.asList("3z4","3Z4");
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assertThat(expected).hasSameElementsAs(solution1.letterCasePermutation("3z4"));
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assertThat(expected).hasSameElementsAs(solution2.letterCasePermutation("3z4"));
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}
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@Test
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publicvoidtest3() {
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expected =Arrays.asList("12345");
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assertThat(expected).hasSameElementsAs(solution1.letterCasePermutation("12345"));
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assertThat(expected).hasSameElementsAs(solution2.letterCasePermutation("12345"));
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}
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}

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