Merge pull request #242 from fejes713/master

Add countVowels

CONTRIBUTING.md

@@ -24,7 +24,7 @@ Here's what you can do to help:
   - Follow snippet descriptions with an empty line.
 - **Snippet code** must be enclosed inside ` ```js ` and ` ``` `.
   - Remember to start your snippet's code on a new line below the opening backticks.
-  - Use ES6 notation to define your function. For example `const myFunction = arg1, arg2 => { }`.
+  - Use ES6 notation to define your function. For example `const myFunction = ( arg1, arg2 ) => { }`.
   - Try to keep your snippets' code short and to the point. Use modern techniques and features. Make sure to test your code before submitting.
   - All snippets must be followed by one (more if necessary) test case after the code, on a new line, in the form of a comment, along with the expected output. The syntax for this is `myFunction('testInput') -> 'testOutput'`. Use multiline comments only if necessary.
   - Try to make your function name unique, so that it does not conflict with existing snippets.
@@ -57,7 +57,7 @@ Here's what you can do to help:
 - Use `()` if your function takes no arguments.
 - Use `_` if an argument inside some function (e.g. `Array.reduce()`) is not used anywhere in your code.
 - Specify default parameters for arguments, if necessary. It is preferred to put default parameters last unless you have pretty good reason not to.
-- If your snippet's function takes variadic arguments, use `..args` (although in certain cases, it might be needed to use a different name).
+- If your snippet's function takes variadic arguments, use `...args` (although in certain cases, it might be needed to use a different name).
 - If your snippet function's body is a single statement, omit the `return` keyword and use an expression instead.
 - Always use soft tabs (2 spaces), never hard tabs.
 - Omit curly braces (`{` and `}`) whenever possible.

README.md

@@ -110,6 +110,7 @@
 * [`anagrams`](#anagrams)
 * [`capitalize`](#capitalize)
 * [`capitalizeEveryWord`](#capitalizeeveryword)
+* [`countVowels`](#countvowels)
 * [`escapeRegExp`](#escaperegexp)
 * [`fromCamelCase`](#fromcamelcase)
 * [`reverseString`](#reversestring)
@@ -1452,6 +1453,21 @@ const capitalizeEveryWord = str => str.replace(/\b[a-z]/g, char => char.toUpperC
 
 [⬆ back to top](#table-of-contents)
 
+### countVowels
+
+Retuns `number` of vowels in provided string.
+
+Use a regular expression to count number of vowels `(A, E, I, O, U)` in a `string`.
+
+```js
+const countVowels = str =>
+  return (str.match(/[aeiou]/ig) || []).length;
+// countVowels('foobar') -> 3
+// countVowels('gym') -> 0
+```
+
+[⬆ back to top](#table-of-contents)
+
 ### escapeRegExp
 
 Escapes a string to use in a regular expression.

docs/index.html

@@ -135,6 +135,7 @@
 </h3><a class="sublink-1" href="#anagrams">anagrams</a>
 <a class="sublink-1" href="#capitalize">capitalize</a>
 <a class="sublink-1" href="#capitalizeeveryword">capitalizeEveryWord</a>
+<a class="sublink-1" href="#countvowels">countVowels</a>
 <a class="sublink-1" href="#escaperegexp">escapeRegExp</a>
 <a class="sublink-1" href="#fromcamelcase">fromCamelCase</a>
 <a class="sublink-1" href="#reversestring">reverseString</a>
@@ -886,6 +887,14 @@ Omit the <code>lowerRest</code> parameter to keep the rest of the string intact,
 <pre><code class="language-js">const capitalizeEveryWord = str =&gt; str.replace(/\b[a-z]/g, char =&gt; char.toUpperCase());
 // capitalizeEveryWord('hello world!') -&gt; 'Hello World!'
 </code></pre>
+</div></div><br/><div class="card fluid"><div class="section double-padded"><h3 id="countvowels">countVowels</h3></div><div class="section double-padded">
+<p>Retuns <code>number</code> of vowels in provided string.</p>
+<p>Use a regular expression to count number of vowels <code>(A, E, I, O, U)</code> in a <code>string</code>.</p>
+<pre><code class="language-js">const countVowels = str =&gt;
+  return (str.match(/[aeiou]/ig) || []).length;
+// countVowels('foobar') -&gt; 3
+// countVowels('gym') -&gt; 0
+</code></pre>
 </div></div><br/><div class="card fluid"><div class="section double-padded"><h3 id="escaperegexp">escapeRegExp</h3></div><div class="section double-padded">
 <p>Escapes a string to use in a regular expression.</p>
 <p>Use <code>replace()</code> to escape special characters.</p>

snippets/countVowels.md

@@ -0,0 +1,11 @@
+### countVowels
+
+Retuns `number` of vowels in provided string.
+
+Use a regular expression to count number of vowels `(A, E, I, O, U)` in a `string`.
+
+```js
+const countVowels = str => (str.match(/[aeiou]/ig) || []).length;
+// countVowels('foobar') -> 3
+// countVowels('gym') -> 0
+```

tag_database

@@ -15,6 +15,7 @@ collatz:math
 compact:array
 compose:function
 countOccurrences:array
+countVowels:string
 currentURL:browser
 curry:function
 deepFlatten:array