Searching for words in string

Question

I'm trying to make a function that finds the string that contains all words from an array.

I have tried this:

function multiSearchOr(text, searchWords){
    var searchExp = new RegExp(searchWords.join("|"),"gi");
    return (searchExp.test(text))?"Found!":"Not found!";
}

alert(multiSearchOr("Hello my name sam", ["Hello", "is"]))

But this only alert "Found" when one of the words have been found.

I need it to alert me when all the words are in the string.

An example:

var sentence = "I love cake"    
var words = ["I", "cake"];

I want the application to alert me when it finds all of the words from the array in the string sentence. Not when it only found one of the words.

Answer 1

If you're interested in using only a single regular expression, then you need to use a positive lookahead when constructing your expression. It will look something like that:

'(?=\\b' + word + '\\b)'

Given this construction, you can then create your regular expression and test for the match:

function multiSearchOr(text, searchWords){
    var regex = searchWords
        .map(word => "(?=.*\\b" + word + "\\b)")
        .join('');
    var searchExp = new RegExp(regex, "gi");
    return (searchExp.test(text))? "Found!" : "Not found!";
}