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freecodecamp: regular expression

freecodecamp: regular expression

How to pass these challenge? I note that snippet code. Help people to help myself.


Regular Expressions - Reuse Patterns Using Capture Groups
"let reRegex = /^(\d+)\s\1\s\1$/; // Change this line"
Use Capture Groups to Search and Replace
"let fixRegex = /good/; // Change this line
let replaceText = "okey-dokey"; // Change this line"
Remove Whitespace from Start and End
"let wsRegex = /\s{2,}/g; // Change this line
let result = hello.replace(wsRegex,''); // Change this line"

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