find string for duplicated

extract-strings

var fs = require('fs');
var util = require('util');

var full = fs.readFileSync('full.txt',{ encoding:"utf-8"}).toString().split('\n');
var ext = fs.readFileSync('ext.txt',{ encoding:"utf-8"}).toString().split('\n');

String.prototype.trim = function() {
    return this.replace(/(^\s*)|(\s*$)/gi, "");
};

var count = 0,
    full_len = full.length,
    ext_len = ext.length;

var i = 0;
while (i < ext_len) {
    var check = new RegExp(ext[i].toString().trim(), '');
    var j = 0;
    while (j < full_len) {
        var text = full[j].toString().trim();
        if (check.test(text)) {
            count++;
            util.log(count);
            fs.appendFileSync('done.txt', text + '\n');
            break;
        }
        j++;
    }
    i++;
}

/* forEach can't break
ext.forEach(function(line1) {
    var check = new RegExp(line1.toString().trim(), '');
    full.forEach(function(line2) {
        var text = line2.toString().trim();
        if (check.test(text)) {
            count++;
            util.log(count);
            fs.appendFileSync('done.txt', text + '\n');
        }
    });
});
*/