JavaScript: Searching for a string inside a string

Question

I need to find a regular expression that would be able to work around an issue I am having.

Query: barfly london

Should match: Camden Barfly, 49 Chalk Farm Road, London, NW1 8AN

I've tried many, many regex's for this, but none have worked so far. I am considering that maybe I will need to split the search into two separate queries for it to work.

Could anyone point me in the right direction? I'm a bit new to this area.

Answer 1

Try this:

var r = /barfly|london/gi
str = "Camden Barfly, 49 Chalk Farm Road, London, NW1 8AN"
alert(str.match(r).length>1)

Answer 2

I'd suggest not using regexs if you want to search for two string literals, and instead use normal string searching twice:

var test="Camden Barfly, 49 Chalk Farm Road, London, NW1 8AN"
if ((test.indexOf("Barfly") != -1) && (test.indexOf("London") != -1)) {
   alert("Matched!");
}

If you're not concerned about case-sensitivity, then you can just lowercase/uppercase your test string and your string literals accordingly.

Answer 3

Check this:

var my_text = "Camden Barfly, 49 Chalk Farm Road, London, NW1 8AN, london again for testing"
var search_words = "barfly london";

String.prototype.highlight = function(words_str)
{
    var words = words_str.split(" ");
    var indicies = [];
    var last_index = -1;
    for(var i=0; i<words.length; i++){
        last_index = this.toLowerCase().indexOf(words[i], last_index);
        while(last_index != -1){
            indicies.push([last_index, words[i].length]);
            last_index = this.toLowerCase().indexOf(words[i], last_index+1);
        }

    }
    var hstr = "";
    hstr += this.substr(0, indicies[0][0]);
    for(var i=0; i<indicies.length; i++){
        hstr += "<b>"+this.substr(indicies[i][0], indicies[i][1])+"</b>";
        if(i < indicies.length-1) {
            hstr += this.substring(indicies[i][0] + indicies[i][1], indicies[i+1][0]);
        }
    }
    hstr += this.substr(indicies[indicies.length-1][0]+indicies[indicies.length-1][1], this.length);
    return hstr;
}

alert(my_text.highlight(search_words));
// outputs: Camden <b>Barfly</b>, 49 Chalk Farm Road, <b>London</b>, NW1 8AN, <b>london</b> again for testing

Answer 4

theString.match( new RegExp( query.replace( ' ', '\b.*\b' ), 'i' ) )

Answer 5

Dominic's solution without case sensitivity. This is what I needed for my project.

var test="Camden Barfly, 49 Chalk Farm Road, London, NW1 8AN";
if ((test.toLowerCase().indexOf("barfly") != -1) && (test.toLowerCase().indexOf("london") != -1)) {
    alert("Matched");
}
else {
    alert("Not matched");
}