feat: add two implemetaion of

fahimfaisaal · fahimfaisaal · commit 83c5131830c7 · 2022-02-27T16:07:26.000+06:00
The first implementation with regex and second via HashSet &amp; add the test code for both
diff --git a/String/CheckPangram.js b/String/CheckPangram.js
@@ -1,12 +1,12 @@
 /**
- * @function checkPangram
- * @description - Pangram is a sentence that contains all the letters in the alphabet https://en.wikipedia.org/wiki/Pangram
+ * @function checkPangramRegex
+ * @description - This function check pangram with the help of regex pattern
  * @param {string} string
  * @returns {boolean}
- * @example - checkPangram("'The quick brown fox jumps over the lazy dog' is a pangram") => true
- * @example - checkPangram('"Waltz, bad nymph, for quick jigs vex." is a pangram') => true
+ * @example - checkPangramRegex("'The quick brown fox jumps over the lazy dog' is a pangram") => true
+ * @example - checkPangramRegex('"Waltz, bad nymph, for quick jigs vex." is a pangram') => true
  */
-const checkPangram = (string) => {
+const checkPangramRegex = (string) => {
   if (typeof string !== 'string') {
     throw new TypeError('The given value is not a string')
   }
@@ -23,4 +23,28 @@ const checkPangram = (string) => {
   return string.match(/([a-z])(?!.*\1)/gi).length === 26
 }
 
-export { checkPangram }
+
+/**
+ * @function checkPangramSet
+ * @description - This function detect the pangram sentence by HashSet
+ * @param {string} string 
+ * @returns {boolean}
+ */
+const checkPangramSet = (string) => {
+  if (typeof string !== 'string') {
+    throw new TypeError('The given value is not a string')
+  }
+
+  const lettersSet = new Set()
+
+  for (const letter of string.toUpperCase()) {
+    if (/[A-Z]/.test(letter)) {
+      // if the letter is a valid uppercase alphabet then the add method insert the letter to the HashSet
+      lettersSet.add(letter)
+    }
+  }
+
+  return lettersSet.size === 26
+}
+
+export { checkPangramRegex, checkPangramSet}
diff --git a/String/test/CheckPangram.test.js b/String/test/CheckPangram.test.js
@@ -1,33 +1,65 @@
-import { checkPangram } from '../CheckPangram'
+import { checkPangramRegex, checkPangramSet } from '../CheckPangram'
 
-describe('checkPangram', () => {
+describe('Testing checkPangramRegex function', () => {
   it('"The quick brown fox jumps over the lazy dog" is a pangram', () => {
     expect(
-      checkPangram('The quick brown fox jumps over the lazy dog')
-    ).toBeTruthy()
+      checkPangramRegex('The quick brown fox jumps over the lazy dog')
+    ).toBe(true)
   })
 
   it('"Waltz, bad nymph, for quick jigs vex." is a pangram', () => {
-    expect(checkPangram('Waltz, bad nymph, for quick jigs vex.')).toBeTruthy()
+    expect(checkPangramRegex('Waltz, bad nymph, for quick jigs vex.')).toBe(true)
   })
 
   it('"Jived fox nymph grabs quick waltz." is a pangram', () => {
-    expect(checkPangram('Jived fox nymph grabs quick waltz.')).toBeTruthy()
+    expect(checkPangramRegex('Jived fox nymph grabs quick waltz.')).toBe(true)
   })
 
   it('"My name is Unknown" is NOT a pangram', () => {
-    expect(checkPangram('My name is Unknown')).toBeFalsy()
+    expect(checkPangramRegex('My name is Unknown')).toBe(false)
   })
 
   it('"The quick brown fox jumps over the la_y dog" is NOT a pangram', () => {
     expect(
-      checkPangram('The quick brown fox jumps over the la_y dog')
-    ).toBeFalsy()
+      checkPangramRegex('The quick brown fox jumps over the la_y dog')
+    ).toBe(false)
   })
 
   it('Throws an error if given param is not a string', () => {
     expect(() => {
-      checkPangram(undefined)
+      checkPangramRegex(undefined)
     }).toThrow('The given value is not a string')
   })
 })
+
+describe('Testing checkPangramSet function', () => {
+  it('"The quick brown fox jumps over the lazy dog" is a pangram', () => {
+    expect(
+      checkPangramSet('The quick brown fox jumps over the lazy dog')
+    ).toBe(true)
+  })
+
+  it('"Waltz, bad nymph, for quick jigs vex." is a pangram', () => {
+    expect(checkPangramSet('Waltz, bad nymph, for quick jigs vex.')).toBe(true)
+  })
+
+  it('"Jived fox nymph grabs quick waltz." is a pangram', () => {
+    expect(checkPangramSet('Jived fox nymph grabs quick waltz.')).toBe(true)
+  })
+
+  it('"My name is Unknown" is NOT a pangram', () => {
+    expect(checkPangramSet('My name is Unknown')).toBe(false)
+  })
+
+  it('"The quick brown fox jumps over the la_y dog" is NOT a pangram', () => {
+    expect(
+      checkPangramSet('The quick brown fox jumps over the la_y dog')
+    ).toBe(false)
+  })
+
+  it('Throws an error if given param is not a string', () => {
+    expect(() => {
+      checkPangramSet(undefined)
+    }).toThrow('The given value is not a string')
+  })
+})
