I have a little code snippet where I use Regular Expressions to rip off punctuation, numbers etc from a string. I am getting undefined along with output of my ripped string. Can someone explain whats happening? Thanks
var regex = /[^a-zA-z\s\.]|_/gi;
function ripPunct(str) {
if ( str.match(regex) ) {
str = str.replace(regex).replace(/\s+/g, "");
}
return str;
}
console.log(ripPunct("*@£#[email protected]"));You should pass a replacement pattern to the first replace method, and also use A-Z, not A-z, in the pattern. Also, there is no point to check for a match before replacing, just use replace directly. Also, it seems the second chained replace is redundant as the first one already removes whitespace (it contains \s). Besides, the |_ alternative is also redundant since the [^a-zA-Z\s.] already matches an underscore as it is not part of the symbols specified by this character class.
var regex = /[^a-zA-Z\s.]/gi;
function ripPunct(str) {
return str.replace(regex, "");
}
console.log(ripPunct("*@£#[email protected]"));
