Question

I have a json object like shown below which contains id-to name mappings:

   idToNamesMap =  {"1":"name5","2":"name6","3":"name7","4":"name8"} 

Now I want to search for names in this id-to name mappings object. For example search & return all names starting with string “name” along with corresponding ids. Could you suggest how to do this ?

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I use jQuery 1.7.

Answer 1

If I understand you correctly you want to filter the items starting with "name" and then flip the object keys / values:

var idToNamesMap =  {"1":"name5","2":"name6","3":"name7","4":"name8"},
searchPattern = /^name/;

function searchMap(map, pattern)
{
    var res = {};

    $.each(map, function(i, name) {
        if (pattern.test(name)) {
            res[name] = i;
        }
    });

    return res;
}

console.log(searchMap(idToNamesMap, searchPattern));

Output:

{"name5": "1", "name6": "2", "name7": "3", "name8": "4"}

See also: jQuery.each()