JavaScript, Intro to Regular Expressions

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What is a regular expression?

var isPalindrome = function(s) {
//replace everything in s that is not a letter/number with an empty string/negative space
s = s.replace(/[^a-z0-9]/gi,"")
let left = 0
let right = s.length -1
while (left < right){
if (s[left].toLowerCase() !== s[right].toLowerCase()) return false
left++
right--
}
return true
};

In the code above:

how does it work?

s = s.replace(/[^a-z0-9]/gi,"")

conclusion

A Software Engineer with a background in Education Technology and Dance. Recent grad form FlatIron Bootcamp, and passion for the arts and working with databases