Praveen Manvi's Technical Diary: June 2010

Using groovy to search name for my newly born son.
I had the un-sorted list of names of the God Vishnu from where I wanted to select a name, so wanted to sort them out alphabetically & used Groovy for the same.
Groovy Code in Java style - Click to see the code

1    def top = """
2        <html> <head>
3        <script LANGUAGE="JavaScript">
4        <!--

5            function toggle(id) { var e = document.getElementById(id); e.style.display = e.style.display == "none" ? "block" : "none"; return false}
6        //-->
7        </script>

8        </head>
9        <body>
10       """
11   def htmlOut = top
12   def set = new TreeSet<String>()

13   new File('c:/vishnu.txt').eachLine {
14     set.add(it.toLowerCase().trim())
15   }
16   def ref = "a"
17   htmlOut += """

18           <a href="#" onclick="return toggle('$ref')">$ref</a>
19           <div id='$ref' style="display:none">

20       """
21   set.each {
22     if (ref != it.charAt(0)) {
23       htmlOut += "</div>"
24       ref = it.charAt(0)

25       htmlOut += """
26               <a href="#" onclick="return toggle('$ref')">$ref</a>
27               <div id='$ref' style="display:none">

28           """
29     }
30     htmlOut += it
31     htmlOut += "<br/>"
32   }
33   htmlOut += "<br/></body>"

34   writer = new FileWriter('vishnu.html')
35   writer.println(htmlOut)
36   writer.flush()
37   
38   println 'done :)'
39

Groovy with DSL MarkUpBuilder -Click to see the code

1    def writer = new FileWriter('c:/Names1000.html')
2    def src = new groovy.xml.MarkupBuilder(writer)
3    src.html {
4      head {

5        script """
6            function toggle(id) { var e = document.getElementById(id); e.style.display = e.style.display == "none" ? "block" : "none"; return false}
7          """

8      }
9      def set = new TreeSet<String>()
10     new File('c:/vishnu.txt').eachLine {

11       set.add(it.toLowerCase().trim())
12     }
13     body {
14       for (alphabet in 97..122) {

15         char current = ((char) alphabet)
16         Set<String> names = set.findAll { it.charAt(0) == current}
17         def size = names.size()

18         if (size != 0) {
19           a(href: "#", onclick: "return toggle(\"$current\")") {
20             span "$current ($size)"

21           }
22           div(id: current, style: 'display:none') {
23             names.each {
24               li it
25             }

26           }
27         } else {
28           span "$current ($size)"

29         }
30         br ''
31       }
32     }
33     println 'done :)'
34   }

Unsorted 1000 Names
Sorted 1000 Names with groovy
Groovy is indeed Java++, It adds nicer syntax, closures and fluent interface making coding a joy without much noise.
Here is the result from groovy program. Click on letters to hide/expand the names starting with those letters.

a (113)
b (54)c (20)d (57)e (6)f (0)
g (25)h (13)i (3)
j (22)k (58)l (10)m (64)n (33)
o (4)
p (81)q (0)
r (14)s (243)t (19)
u (8)v (119)w (0)
x (0)
y (22)z (0)

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Thursday, June 03, 2010

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