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Comparing text files for equality


Comparing text files for equality

By : user2953260
Date : November 20 2020, 01:01 AM
it should still fix some issue Have a look at the NSFileManager documentation. There is a method which will complete your task I think:
code :
NSFileManager *filemgr;
filemgr = [NSFileManager defaultManager];

if ([filemgr contentsEqualAtPath: @"/path/to/file1.txt" andPath: @"/path/to/file2.txt"] == YES) {
    //MATCH
}


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Comparing large text files - Is comparing hashes faster than using subsets of the file?

Comparing large text files - Is comparing hashes faster than using subsets of the file?


By : user3614781
Date : March 29 2020, 07:55 AM
may help you . Option A is only useful if you reuse the hash (i.e. have other files to compare) so that the cost of calculating the hash isn't a factor...
Otherwise Option B is what i would go for...
comparing two collections for comparing two text files for additions, deletions, modifications

comparing two collections for comparing two text files for additions, deletions, modifications


By : Venkatesh Kumar
Date : March 29 2020, 07:55 AM
this one helps. Overall, I don't think this is the correct approach. Instead of storing all the information in a single String, I would create an object with fields for the various things you need to store.
code :
public Student {
   String id; //or int, or char[8]
   String firstName, lastName;
   String address;
  //and so on

  //constructor - Given a line of input from the data file, create a Student object
  public Student(String line) {
     id = line.substring(0,8);
     //and so on

  }
ArrayList<String> newKeys = new ArrayList<>();  //java 7 syntax
ArrayList<String> oldKeys = new ArrayList<>();
//store keys from files.

TreeMap<Integer, Integer> commonKeys = new TreeMap<Integer, Integer>();
//stores the index values from newList as keys that get mapped to the old list index.

ArrayList<Integer> removedKeys =ArrayList<>();  
// Store the indices from oldKeys that are not in newKeys.

int newListIndex = 0;
int oldListIndex = 0;
while(newListIndex < newKeys.size() && oldListIndex<oldKeys.size()) {
   if(newKeys.get(newListIndex).equals(oldKeys.get(oldListIndex) ) {
      commonKeys.put(newListIndex,oldListIndex);
      oldListIndex++; newListIndex++ 
   }
   else if(newKeys.get(newListIndex).compareTo(oldKeys.get(oldListIndex)>0 ) {
      removedKeys.add(oldListIndex);
      oldListIndex++
   }
   else {
      //maybe this is a newListIndex that is not in the old list, so it was added.
      newListIndex++;
   }
}
for(int i=0; i<oldKeys.size(); i++) {
   String oldKey = oldKeys.get(i);
   if(newKeys.contians(oldKey);
       commonKeys.put(newKeys.indexOf(oldKey) , i);
   else
       removedKeys.add(i);

}
Comparing equality of strings, but also only comparing String objects (hard type check)

Comparing equality of strings, but also only comparing String objects (hard type check)


By : Rahul
Date : March 29 2020, 07:55 AM
this will help In the middle of a refactoring, I've noticed that anything (because it's inherited from Object) can be compared using the equals() method, but I want to call a method that only compares Strings, because that would let the compiler stop me if I'm comparing objects of different types. , @Julio Rodrigues you can use the method contentEquals()
code :
string1.contentEquals(string2)
How to fix issues with comparing text of 2 files and comparing

How to fix issues with comparing text of 2 files and comparing


By : Mona Baskar
Date : March 29 2020, 07:55 AM
With these it helps I modified your script. Please use the below code to fulfil your requirement. Do not forget to close all the open files.
code :
with open('Master-EDR-List.txt', 'r') as f:
 d = f.readlines()
#Open New File
with open('New-EDR-List.txt', 'r') as f:
 e = f.readlines()
out = open('file_diff.txt', 'a')

for newline in e:
 found = False
 for oldline in d:
  if((newline.strip(' \t\n\r')) == (oldline.strip(' \t\n\r'))):
   found = True
   break;
 if(found == False):
  if(newline != '\n'):
   out.writelines(newline)
Comparing two PDF files text using PDFBox is failing eventhough both files are having same text

Comparing two PDF files text using PDFBox is failing eventhough both files are having same text


By : Erman Pehlivan
Date : March 29 2020, 07:55 AM
Any of those help
However recently I came across actual exported file , which looks as same as expected one (as far as data is concerned) , however when comparing it with pdfbox , it is failing
code :
<0000> <0000> <0000>
<0001> <0002> [<F125> <F128> ] 
<0000> <0000> <0000>
<0001> <0002> [<F126> <F129> ] 
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