How can I extract data from a string using another string as a template?

Question

I am looking for an efficient way to generically extract data from a string using another string as a template. Pseudocode:

var mystring = \"NET,1:1,0,ipv4,192.1         


        

Answer 1

//This method obtains each lable in the template string
function getLables(patt, templateStr) {
    var i = 0;
    var tmp = patt.exec(templateStr);
    var lables = new Array();
    while(tmp) {
        lables[i] = new String(tmp).replace("[", "").replace("]", "");
        tmp = patt.exec(templateStr);
        ++i;
    }
    return lables;
}

function extract(_inputStr, _template) {
    //Supposing the start string in template is NET
    var startStr = "NET";
    var inputStr = _inputStr.replace(startStr, "");
    var template = "";

    //You can add a control on the correctness of the template
    if(_template.indexOf(startStr) != 0) {
        return false;
        //you could use a throw clausole, in order to use exceptions
    } else {
        template = _template.replace(startStr, "");
    }

    var patt = /\[[a-z | _]+\]/ig; //Pattern to recognize each [lable]
    var delim = template.replace(patt, "[]").split("[]"); //Delimiter list
    var lable = getLables(patt, template); //Lables list
    var result = new Object();

    var endIndex;
    for(var i=0; i

In this example:

var template = "NET???[one]/[two]";
var inputStr = "NET???test/8";

JSON.stringify(extract(inputStr, template));

The result is:

{
    "one":"test",
    "two":"8"
}