Added practice for regexs

Match4OrMore.js

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+let haStr = "Hazzzzah";
+let haRegex = /Haz{4,}ah/; // Change this line
+let result = haRegex.test(haStr);

MatchOh.js

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+let ohStr = "Ohhh no";
+let ohRegex = /Oh{3,6}\sno/; // Change this line
+let result = ohRegex.test(ohStr);

RegexToMatchStrings/AlphabetRegex.js

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+let quoteSample = "The five boxing wizards jump quickly.";
+let alphabetRegexV2 = /\wg/; // Change this line
+let result = quoteSample.match(alphabetRegexV2).length;
+console.log(result)

RegexToMatchStrings/CheckUserName.js

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+let username = "JackOfAllTrades";
+let userCheck = /^[a-z][a-z]+[0-9]*$|[a-z][\d][\d]+$/i; // check whether the username start with 2 letters or start with 1 letter and followed by number.
+let result = userCheck.test(username);

RegexToMatchStrings/CountingWhiteSpace.js

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+let sample = "Whitespace is important in separating words";
+let countWhiteSpace = /\s/g; // Change this line
+let result = sample.match(countWhiteSpace);

RegexToMatchStrings/FindMultipleMatch.js

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+let twinkleStar = "Twinkle, twinkle, little star";
+let starRegex = /twinkle/gi; // Change this line
+let result = twinkleStar.match(starRegex); // Change this line

RegexToMatchStrings/IgnoreCaseMatch.js

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+let myString = "freeCodeCamp";
+let fccRegex = /freeCodeCamp/i; // Change this line
+let result = fccRegex.test(myString);

RegexToMatchStrings/LazyMatch.js

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+let text = "<h1>Winter is coming</h1>";
+let myRegex = /<.*?>/; // Change this line
+let result = text.match(myRegex);
+console.log(result);

RegexToMatchStrings/MatchAllNumberAndLetters.js

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+let quoteSample = "The five boxing wizards jump quickly.";
+let alphabetRegexV2 = /\w/gi; // Change this line
+let result = quoteSample.match(alphabetRegexV2).length;

RegexToMatchStrings/MatchAlphabet.js

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+let quoteSample = "The quick brown fox jumps over the lazy dog.";
+let alphabetRegex = /[a-z]/gi; // Change this line
+let result = quoteSample.match(alphabetRegex); // Change this line

RegexToMatchStrings/MatchAnythingWithDot.js

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+let exampleStr = "Let's have fun with regular expressions!";
+let unRegex = /.un/; // Match anything end with un
+let result = unRegex.test(exampleStr);

RegexToMatchStrings/MatchBothNumberAndLetter.js

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+let quoteSample = "Blueberry 3.141592653s are delicious.";
+let myRegex = /[h-s2-6]/ig; // Change this line
+let result = quoteSample.match(myRegex); // Change this line
+console.log(result);

RegexToMatchStrings/MatchBothVersion.js

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+let favWord = "favorite";
+let favRegex = /favou?rite/; // Change this line
+let result = favRegex.test(favWord);

RegexToMatchStrings/MatchCharacterMoreThan1Time.js

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+let difficultSpelling = "Mississippi";
+let myRegex = /s+/g; // Change this line
+let result = difficultSpelling.match(myRegex);

RegexToMatchStrings/MatchExact3Times.js

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+let repeatNum = "42 42 42";
+let reRegex = /^(\d+)(\s)\1\2\1$/; // Change this line
+let result = reRegex.test(repeatNum);

RegexToMatchStrings/MatchExactNumber.js

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+let timStr = "Timmmmber";
+let timRegex = /Tim{4}ber/; // Change this line
+let result = timRegex.test(timStr);

RegexToMatchStrings/MatchMethodExample.js

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+let extractStr = "Extract the word 'coding' from this string.";
+let codingRegex = /coding/; // Change this line
+let result = extractStr.match(codingRegex); // Change this line

RegexToMatchStrings/MatchNonLetterAndLetters.js

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+let quoteSample = "The five boxing wizards jump quickly.";
+let nonAlphabetRegex = /\W/g; // Change this line
+let result = quoteSample.match(nonAlphabetRegex).length;

RegexToMatchStrings/MatchNonNumber.js

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+let movieName = "2001: A Space Odyssey";
+let noNumRegex = /\D/g; // Change this line
+let result = movieName.match(noNumRegex).length;

RegexToMatchStrings/MatchNonVowelAndNumbers.js

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+let quoteSample = "3 blind mice.";
+let myRegex = /[^aeiou0-9]/gi; // Change this line
+let result = quoteSample.match(myRegex); // Change this line

RegexToMatchStrings/MatchNonWhiteSpace.js

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+let sample = "Whitespace is important in separating words";
+let countNonWhiteSpace = /\S/g; // Change this line
+let result = sample.match(countNonWhiteSpace);

RegexToMatchStrings/MatchNumbersAlone.js

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+let movieName = "2001: A Space Odyssey";
+let numRegex = /\d/g; // Change this line
+let result = movieName.match(numRegex).length;

RegexToMatchStrings/MatchVowelsInString.js

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+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 = quoteSample.match(vowelRegex); // Change this line
+console.log(result);

RegexToMatchStrings/MixGroupingExample.js

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+let myString = "Eleanor Roosevelt";
+let myRegex = /(Franklin|Eleanor).*Roosevelt/; // Change this line
+let result = myRegex.test(myString); // Change this line
+// After passing the challenge experiment with myString and see how the grouping works

RegexToMatchStrings/PassWordCheckExample.js

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+let sampleWord = "astronaut";
+let pwRegex = /(?=\w{6,})(?=\D*\d\d)/; // Change this line
+let result = pwRegex.test(sampleWord);

RegexToMatchStrings/TrimWhiteSpaceWithRegex.js

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+let hello = "   Hello, World!  ";
+let wsRegex = /^(\s+)|(\s+)$/g; // Change this line
+let result = hello.replace(wsRegex,""); // Change this line

RegexToMatchStrings/UseRegexToReplace.js

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+let str = "one two three";
+let fixRegex = /(\w+)\s(\w+)\s(\w+)/; // Change this line
+let replaceText = "$3 $2 $1"; // Change this line
+let result = str.replace(fixRegex, replaceText);