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Speed testing for a data munging task — Read more

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http://anyall.org/blog/?p=652

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fix flushing in Java version 
DRMacIver (author)
Thu Sep 10 06:05:04 -0700 2009
commit  474264d36c92f2ab6e7f9195a9afe8119ab2ccf9
tree    7537526b60e86396fdfa78fa66a3c98e2757efea
parent  4f672dfbff8e20a7de0587a6e15627e64c7c1560
awkspeed / Formatter.java Formatter.java
100644 41 lines (34 sloc) 1.059 kb
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import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.HashMap;
public class Formatter {
public static void main(String[] args) throws Exception{
HashMap<String, Integer> imap = new HashMap<String, Integer>();
HashMap<String, Integer> jmap = new HashMap<String, Integer>();
int j = 0;
 
BufferedWriter vocab = new BufferedWriter(new FileWriter("vocab"));
 
for(String file : args){
BufferedReader in = new BufferedReader(new FileReader(file));
BufferedWriter out = new BufferedWriter(new FileWriter(file + "n"));
String feats = in.readLine();
int i = 0;
while(feats != null){
String[] vals = feats.split(" ");
String key = file + " " + vals[0];
if(imap.get(key) == null){
imap.put(key, ++i);
}
if(jmap.get(vals[1]) == null){
jmap.put(vals[1], ++j);
vocab.write(vals[1] + "\n");
}
out.write(imap.get(key) + " " + jmap.get(vals[1]) + " " + vals[2] + "\n");
feats = in.readLine();
}
 
out.close();
 
}
 
vocab.flush();
 
}
}
 
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