CODEWITHSUNDEEP
javascript
user2680821
user2680821

Reputation: 9

Javascript .match - exclude?

I have the loop below.

I need to pull all the names (lskey) that does not have include the letter p in it, but my attempt is not working.

for(var i = 0; i < localStorage.length; i++) {
    var lsKey = localStorage.key(i);
    var lsValue = localStorage.getItem(localStorage.key(i));
    if(lsKey.match("^p")) {
        $("#appendedLS").append("<input type='hidden' name='" + lsKey + "' value='" + lsValue + "'/>");
    }
}

If any one has answer, I would appreciate it.

Upvotes: 0

Views: 72

Answers (2)

Aman
Aman

Reputation: 9

The indexOf() method returns the position of the first occurrence of a specified value in a string.

This method returns -1 if the value to search for never occurs.

if(lsKey.indexOf("p")==-1){
        //statement}

Upvotes: 0

Mr. Llama
Mr. Llama

Reputation: 20909

So close! Inside of a character class the ^ means negation, but outside it means "beginning of string".

The following should work:

if(lsKey.match("p") === null){

Just check for the character p, if it doesn't exist then match() will return null.

That said, if you don't need to use regular expressions then it's much simpler to use the indexOf method instead:

if(lsKey.indexOf("p") == -1){

Upvotes: 3

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