Scrapping Topcoder with CasperJS

casper_scrapping.js

var casper = require('casper').create();
var startID = 1964;
var endID = 13533;
casper.start();
while (startID <= endID) {
    scrapPages(startID);
    startID++;
}

function scrapPages(i) {
    var str = "Starting to get the HTML for the problem" + i;

    var url = 'http://community.topcoder.com/stat?c=problem_statement&pm=' + i;
    casper.thenOpen(url, function() {
        var result = this.getHTML('td.problemText');
        casper.then(function() {
            var fileName = 'problem' + i + ".html";
            require('fs').write(fileName, result, 'w');
            this.echo("writing it to filename:  " + fileName)
        });

    });

}


casper.run();

//Invocation : casperjs /path_to_this_file/casper_scrapping.js