common-js-pitfall-2.js

const http = require('http');

var i = 0,
    urls = [ 'http://www.google.com', 'http://www.yahoo.com' ],
    urlLength = urls.length;

for (; i < urlLength; i++) {
    var innerI = i;
    http.get(urls[i], function() { console.log('i: ' + innerI); });
}