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Index › Programming Questions & Help › Syntax Questions › Word Count from List
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Word Count from List (Read 1433 times)
PierG
Word Count from List
Apr 30th, 2010, 2:18pm  
I've found a processing-based wordcounter on this site.
This is very useful for me, but there's a way if I want to count only some words, such the name of persons from an "include" list (ie: name.txt)?

Help me pleaze
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PierG
Re: Word Count from List
Reply #1 - Apr 30th, 2010, 2:19pm  
here the code:

Code:
import java.util.*;
import java.util.List;

Map words;

void setup() {
  words = new TreeMap();

  addWord("rick");
  addWord("rick");
  addWord("hi");
  addWord("hi");
  addWord("hi");
  addWord("hi");
  addWord("haus");
  addWord("hi");
  addWord("test");
  addWord("hi");
  addWord("hi");
  addWord("stefan");

  println("--unsorted:");
  print(words);

  println("\n--sorted by value:");
  print(createMapSortedByValue());
}

void addWord(String value) {
  Integer n = (Integer) words.get(value);
  int count = (n != null ? n.intValue() + 1 : 1);
  words.put(value, new Integer(count));
}

Map createMapSortedByValue() {
  //create a Comparator for words
  SortByValueComparator byValueComp = new SortByValueComparator(words);
  //create a sorted treemap, sorted with byValueComp
  SortedMap sortedWords = new TreeMap(byValueComp);
  //add all elements from words
  sortedWords.putAll(words);
  //println(sortedWords.size());
  //println(sortedWords.get("auto"));
  return sortedWords;
}

void print(Map map) {
  Iterator iter = map.keySet().iterator();
  while (iter.hasNext()) {
    String name = (String) iter.next();
    System.out.println(name + " " + map.get(name));
  }
}

/**
 * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
 * http://www.manticmoo.com/articles/jeff/programming/java/sorting-maps-by-value.php
 */
class SortByValueComparator implements Comparator {
  Map words;

  SortByValueComparator(Map words) {
    this.words = words;
  }

  int compare(Object arg0, Object arg1) {
    int val0 = ((Integer) (words.get(arg0))).intValue();
    int val1 = ((Integer) (words.get(arg1))).intValue();

    if (val0 < val1) {
	return 1;
    } 
    else if (val0 == val1) {
	// same counts so compare names
	return ((String) arg0).compareTo((String) arg1);
    } 
    else {
	return -1;
    }
  }
}
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PhiLho 
Re: Word Count from List
Reply #2 - May 1st, 2010, 1:37am  
Keep a list of names. I recommend using a HashSet for that: it allows a quick check if a string is in the set, using contains().
Each time you are about to add a string in your Map, first check if it is in your list. If not, just don't add it.
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WWW  
PierG
Re: Word Count from List
Reply #3 - May 3rd, 2010, 3:06am  
sorry again...
if I want to check if an array contains item of another array, how can I do?
I've tried this, but it doesn't work:

Code:

import java.util.*;
import java.util.List;

String[] lines = loadStrings("original.txt");
for (int i = 0; i < lines.length; i++);

String[] include = loadStrings("list.txt");
for (int i = 0; i < include.length; i++);

if (include.contains(lines)) {
println (lines[i]);
}


console says:
Cannot invoke conains(String) on the array type String[]
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TfGuy44
Re: Word Count from List
Reply #4 - May 3rd, 2010, 3:11am  
Your for loops aren't doing anything but wasting CPU cycles.

Try this:

import java.util.*;
import java.util.List;
String[] lines = loadStrings("original.txt");
String[] include = loadStrings("list.txt");
for( int i = 0; i < lines.length; i++){
 for( int j = 0; j < include.length; j++){
   if( lines[i].contains(include[j]) ){
     println( include[j] );
   }
 }
}
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PierG
Re: Word Count from List
Reply #5 - May 3rd, 2010, 3:34am  
now it works!!!!

thanks!!!!
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PhiLho 
Re: Word Count from List
Reply #6 - May 3rd, 2010, 4:34am  
As I wrote, a hash set would be much more efficient... Smiley
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