Ramasubramanian

(defn euler-8
  "Problem 8"
  ([numstr]
    (euler-8 (map #(Character/getNumericValue %) numstr) 0))
  ([numseq prod]
    (let [temp-prod (reduce * (take 5 numseq))
          next-list (rest numseq)]
      (if (< (count next-list) 5)  prod
        (recur next-list
          (if (> temp-prod prod) temp-prod prod))))))

Ramasubramanian

(defn sieve-of-era
  "Generate the primes upto N based on sieve of erastothenes"
  ([num] (sieve-of-era [] num (range 2 num)))
  ([primes num sieve]
  (let [x (first sieve)]
    (def divisible? (fn [divisor num] (zero? (rem num divisor))))
    (def remaining (fn [coll x] (remove (partial divisible? x) coll)))
    ;optimisation - enough to remove until current prime ^ 2 < limit
    (if (>= (* x x) num) (concat primes sieve)
      (recur (conj primes x) num (remaining (rest sieve) x))))))

Ramasubramanian

;Project Euler problem 11 - find the greatest product of 4 elements in the 20*20
;grid either vertically, horizontally or diagonally
(def grid
  [[8 2 22 97 38 15 0 40 0 75 4 5 7 78 52 12 50 77 91 8]
  [49 49 99 40 17 81 18 57 60 87 17 40 98 43 69 48 4 56 62 0]
  [81 49 31 73 55 79 14 29 93 71 40 67 53 88 30 3 49 13 36 65]
  [52 70 95 23 04 60 11 42 69 24 68 56 01 32 56 71 37 2 36 91]
  [22 31 16 71 51 67 63 89 41 92 36 54 22 40 40 28 66 33 13 80]
  [24 47 32 60 99 3 45 2 44 75 33 53 78 36 84 20 35 17 12 50]
  [32 98 81 28 64 23 67 10 26 38 40 67 59 54 70 66 18 38 64 70]

Ramasubramanian

    public void redirect(final HttpServletResponse response) throws IOException{
    	String url = "http://abcde.com";
	String out = "<script type=\"text/javascript\">window.top.location=\"" + url+ "\"</script>";
	response.getWriter().print(out);
	response.flushBuffer();
    }

Ramasubramanian

  public synchronized int hashCode() {
           if (hashCode != -1)
               return hashCode;
   
           hashCode = handler.hashCode(this);
           return hashCode;
  }

Ramasubramanian

  protected synchronized InetAddress getHostAddress(URL u) {
           if (u.hostAddress != null)
               return u.hostAddress;
   
           String host = u.getHost();
           if (host == null || host.equals("")) {
               return null;
           } else {
               try {
                   u.hostAddress = InetAddress.getByName(host);

Ramasubramanian

       private static InetAddress[] checkLookupTable(String host) {
           synchronized (lookupTable) {
               // If the host isn't in the lookupTable, add it in the
               // lookuptable and return null. The caller should do
               // the lookup.
               if (lookupTable.containsKey(host) == false) {
                   lookupTable.put(host, null);
                   return null;
               }
   

Ramasubramanian

package test_crawler.test;

import java.util.ArrayList;
import java.util.List;


/**
 * 1. Create a 2D array of characters 
 * 2. Gather the lower edge indexes first e.g. in a 3 x 3 array gather all y positions alone
 * y x x

Ramasubramanian

import java.util.ArrayList;
import java.util.List;

public class ObjectSizeCalcTest {

   static class Employee {
      public int age;
      public int id;
      public String name;
      public Employee(int age, int id, String name) {

Ramasubramanian

import java.io.File;
import java.io.FilenameFilter;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class FileUtil {

   private static String getSimpleFileName(final String fileName){
      if(fileName == null || fileName.length() == 0)