Merge pull request #18 from wakidurrahman/feat/write-function-returns-number-of-vowels-in-string

feat(write-function-returns-number-of-vowels-in-string): implement vowel

Author: wakidurrahman

javascript-today-magazine/returns-the-number-of-vowels-in-a-string.js

@@ -0,0 +1,29 @@
+/**
+ * Write a function that returns the number of vowels in a string.
+ *
+ * Another common interview question: Write a function that returns the number of vowels in a string.
+ * Here we have two solutions,
+ * one makes use of a regular expression, and
+ * another uses an iterative approach, a for-of loop.
+ *
+ * Used in a string. Vowels are the characters "a", "e", "i", "o" and "u"
+ */
+// Solution 1: using regular expression
+// function vowelsHandleByReg(characters: string) {
+//   const matches = characters.match(/[aeiou]/gi);
+//   return matches ? matches.length : 0;
+// }
+// Solution 2: uses an iterative approach, a for-of loop.
+function vowelsHandleByIterative(characters) {
+    var count = 0;
+    var checker = ["a", "e", "i", "0", "u"];
+    for (var _i = 0, _a = characters.toLowerCase(); _i < _a.length; _i++) {
+        var char = _a[_i];
+        if (checker.includes(char)) {
+            count++;
+        }
+    }
+    return count;
+}
+// console.log(vowelsHandleByReg("Wakidur"));
+console.log(vowelsHandleByIterative("Munni"));

javascript-today-magazine/returns-the-number-of-vowels-in-a-string.ts

@@ -0,0 +1,34 @@
+/**
+ * Write a function that returns the number of vowels in a string.
+ *
+ * Another common interview question: Write a function that returns the number of vowels in a string.
+ * Here we have two solutions,
+ * one makes use of a regular expression, and
+ * another uses an iterative approach, a for-of loop.
+ *
+ * Used in a string. Vowels are the characters "a", "e", "i", "o" and "u"
+ */
+
+// Solution 1: using regular expression
+
+// function vowelsHandleByReg(characters: string) {
+//   const matches = characters.match(/[aeiou]/gi);
+//   return matches ? matches.length : 0;
+// }
+
+// Solution 2: uses an iterative approach, a for-of loop.
+function vowelsHandleByIterative(characters: string) {
+  let count: number = 0;
+  const checker: string[] = ["a", "e", "i", "0", "u"];
+
+  for (let char of characters.toLowerCase()) {
+    if (checker.includes(char)) {
+      count++;
+    }
+  }
+  return count;
+}
+
+
+// console.log(vowelsHandleByReg("Wakidur"));
+console.log(vowelsHandleByIterative("Munni"));

tsconfig.json

@@ -11,8 +11,8 @@
     // "disableReferencedProjectLoad": true,             /* Reduce the number of projects loaded automatically by TypeScript. */
 
     /* Language and Environment */
-    "target": "es5",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
-    // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */
+    "target": "es6",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
+    "lib": ["es2016.Array.Include", "es2016", "es6"],                                       /* Specify a set of bundled library declaration files that describe the target runtime environment. */
     // "jsx": "preserve",                                /* Specify what JSX code is generated. */
     // "experimentalDecorators": true,                   /* Enable experimental support for TC39 stage 2 draft decorators. */
     // "emitDecoratorMetadata": true,                    /* Emit design-type metadata for decorated declarations in source files. */