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AlirezaEbrahimkhani:Refactor-20211227-ES6SyntaxRefactoring_and_beautify

Commits on Dec 27, 2021

[Refactor] replace all regex with correct regex string definition
AlirezaEbrahimkhani
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[Feat] isNullAndUndefined method implemented to make code cleaner and more understable
AlirezaEbrahimkhani
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