Added isPandigital function

StringAlgorithms.ts

@@ -1,7 +1,7 @@
 //typescriptClasses/StringAlgorithms.ts
 //Matthew Ellison
 // Created: 07-13-21
-//Modified: 07-13-21
+//Modified: 10-11-21
 //Algorithms for strings
 /*
 	Copyright (C) 2021  Matthew Ellison
@@ -75,7 +75,7 @@ export function isPalindrome(str: string): boolean{
 }
 
 //This function returns the number of times the character occurs in the string
-export function findNumOccurrence(str: string, ch: string){
+export function findNumOccurrence(str: string, ch: string): number{
 	let num: number = 0;	//Set the number of occurrences to 0 to start
 	//Loop through every character in the string and compare it to the character passed in
 	for(let strCh of str){
@@ -86,4 +86,31 @@ export function findNumOccurrence(str: string, ch: string){
 	}
 	//Return the number of times the character appeared in the string
 	return num;
+}
+
+//Returns true if the string passed to it is a pandigital
+export function isPandigitalFull(str: string, bottom: number, top: number): boolean{
+	//Return false if top < bottom
+	if(top < bottom){
+		return false;
+	}
+
+	//Return false if the wrong number of characters are in the string
+	if(str.length != (top - bottom + 1)){
+		return false;
+	}
+
+	//Make sure that all of the needed characters are in the string exactly one time
+	for(let cnt = bottom;cnt <= top;++cnt){
+		//Make sure there is exactly one of this number contained in the string
+		if(findNumOccurrence(str, cnt.toString()) != 1){
+			return false;
+		}
+	}
+
+	//If the function has reached this part is has passed all of the falsifying tests
+	return true;
+}
+export function isPandigital(str: string): boolean{
+	return isPandigitalFull(str, 1, 9);
 }

TestAlgorithms.ts

@@ -1,7 +1,7 @@
 //typescriptClasses/TestAlgorithms.ts
 //Matthew Ellison
 // Created: 10-19-20
-//Modified: 07-13-21
+//Modified: 10-11-21
 //This class holds many algorithms that I have found it useful to keep around
 /*
 Copyright (C) 2021  Matthew Ellison
@@ -23,7 +23,7 @@ Copyright (C) 2021  Matthew Ellison
 
 import { testArrayEquals, testGetSum, testGetProd } from "./TestArrayAlgorithms";
 import { testFactorial, testGCD, testGetAllFib, testGetDivisors, testGetFactors, testGetFib, testGetNumPrimes, testGetPrimes, testIsPrime, testSieveOfEratosthenes, testSqrtBig, testToBin } from "./TestNumberAlgorithms";
-import { testFindNumOccurrences, testGetPermutations, testIsPalindrome } from "./TestStringAlgorithms";
+import { testFindNumOccurrences, testGetPermutations, testIsPalindrome, testIsPandigital } from "./TestStringAlgorithms";
 
 
 //Run the array tests
@@ -49,5 +49,6 @@ testToBin();
 testGetPermutations();
 testIsPalindrome();
 testFindNumOccurrences();
+testIsPandigital();
 
 console.log("All tests passed");

TestStringAlgorithms.ts

@@ -1,7 +1,7 @@
 //typescriptClasses/TestStringAlgorithms.ts
 //Matthew Ellison
 // Created: 07-13-21
-//Modified: 07-13-21
+//Modified: 10-11-21
 //Tests for the string algorithms
 /*
 Copyright (C) 2021  Matthew Ellison
@@ -23,7 +23,7 @@ Copyright (C) 2021  Matthew Ellison
 
 import assert = require("assert");
 import { arrayEquals } from "./ArrayAlgorithms";
-import { getPermutations, isPalindrome } from "./StringAlgorithms";
+import { getPermutations, isPalindrome, isPandigital, isPandigitalFull } from "./StringAlgorithms";
 
 
 export function testGetPermutations(){
@@ -75,3 +75,43 @@ export function testFindNumOccurrences(){
 
 	console.log("findNumOccurrences passed");
 }
+
+export function testIsPandigital(){
+	//Test 1
+	let str: string = "123456789";
+	let correctAnswer: boolean = true;
+	let answer = isPandigital(str);
+	assert.ok((answer == correctAnswer), "isPandigital 1 failed");
+
+	//Test 2
+	str = "123";
+	correctAnswer = true;
+	answer = isPandigitalFull(str, 1, 3);
+	assert.ok((answer == correctAnswer), "isPandigital 2 failed");
+
+	//Test 3
+	str = "123";
+	correctAnswer = false;
+	answer = isPandigital(str);
+	assert.ok((answer == correctAnswer), "isPandigital 3 failed");
+
+	//Test 4
+	str = "123";
+	correctAnswer = false;
+	answer = isPandigitalFull(str, 3, 1);
+	assert.ok((answer == correctAnswer), "isPandigital 4 failed");
+
+	//Test 5
+	str = "1";
+	correctAnswer = true;
+	answer = isPandigitalFull(str, 1, 1);
+	assert.ok((answer == correctAnswer), "isPandigital 5 failed");
+
+	//Test 6
+	str = "112";
+	correctAnswer = false;
+	answer = isPandigitalFull(str, 1, 3);
+	assert.ok((answer == correctAnswer), "isPandigital 6 failed");
+
+	console.log("isPandigital passed");
+}