Question

I am validating a number of fields based on the length of the string entered. However, any of the values in the following array must NOT count against the string length:

var omittedSubStrings = ["%KEYWORD%","{Keyword:AltText}","%CITY_STATE%","%CITY%","%KEYWORD%","%KEY_WORD%","%QUERY_KEYWORD%","%QUERY_KEY_WORD%","$CLICK_ID$","$LOCATION$","%URLENC_CITY%","%NOSPACE_CITY%","%STATE%","$USER_PLACEMENT_INV_ID$"];

so for example if my string is:

var str = "Hello %CITY%";

I want to get the length of that string s.t it equals 6. Multiple variables can possibly be used in one string, and they must all not count against length.

Suggestions?

Answer 1

function countSubstringless(str, subStrings) {
    var length = subStrings.length;
    for (var i=0; i<length; i+=1) {
        str = str.replace(subStrings[i], '');
    }
    return str.length;
}

var omittedSubStrings = ["%KEYWORD%","{Keyword:AltText}","%CITY_STATE%","%CITY%","%KEYWORD%","%KEY_WORD%","%QUERY_KEYWORD%","%QUERY_KEY_WORD%","$CLICK_ID$","$LOCATION$","%URLENC_CITY%","%NOSPACE_CITY%","%STATE%","$USER_PLACEMENT_INV_ID$"];
var str = "Hello %CITY%";

console.log(countSubstringless(str, omittedSubStrings));
// 6