REGEX_Match_Single_Character_with_Multiple_Possibilities.js

/*
Match Single Character with Multiple Possibilities
You learned how to match
literal patterns (/literal/) and
wildcard character (/./).
Those are the extremes of regular expressions, where one
finds exact matches and the other matches everything.
There are options that are a balance between the two extremes.

You can search for a literal pattern with some flexibility
with character classes.
Character classes allow you to define a group of characters
you wish to match by placing them inside
square ([ and ]) brackets.

For example, you want to match bag, big, and bug but not bog.
You can create the regex /b[aiu]g/ to do this.
The [aiu] is the character class that will only match the
characters a, i, or u.

let bigStr = "big";
let bagStr = "bag";
let bugStr = "bug";
let bogStr = "bog";
let bgRegex = /b[aiu]g/;
bigStr.match(bgRegex);
bagStr.match(bgRegex);
bugStr.match(bgRegex);
bogStr.match(bgRegex);
In order, the four match calls would return the
values ["big"], ["bag"], ["bug"], and null.

EXERCISE

Use a character class with vowels (a, e, i, o, u) in your regex
vowelRegex to find all the vowels in the string quoteSample.

Note: Be sure to match both upper- and lowercase vowels.

You should find all 25 vowels.

Your regex vowelRegex should use a character class.

Your regex vowelRegex should use the global flag.

Your regex vowelRegex should use the case insensitive flag.

Your regex should not match any consonants.
*/

let quoteSample = "Beware of bugs in the above code; I have only proved it correct, not tried it.";
let vowelRegex = /[aeiou]/gi; // Change this line
//let result = vowelRegex.test(quoteSample); // Change this line
let result = quoteSample.match(vowelRegex);
console.log(result.length);