Processing 1.0 - Processing Discourse - Best way to compare two arrays?

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Best way to compare two arrays? (Read 670 times)

kabatwa

Best way to compare two arrays?
May 6^th, 2010, 4:30am

Hi, I'm wanting to compare two arrays. One of the arrays will be local; the other a remote one that I load into processing with loadStrings(). I'm wondering the best way to view the difference between the two of them?
After doing a bit of searching I found that you can use an arrayList and using removeAll to find the difference between the both:

Quote:

// Create a couple ArrayList objects and populate them
// with some delicious fruits.
Collection firstList = new ArrayList() {{
    add("apple");
    add("orange");
}};

Collection secondList = new ArrayList() {{
    add("apple");
    add("orange");
    add("banana");
    add("strawberry");
}};

// Show the "before" lists
System.out.println("First List: " + firstList);
System.out.println("Second List: " + secondList);

// Remove all elements in firstList from secondList
secondList.removeAll(firstList);

// Show the "after" list
System.out.println("Result: " + secondList);

However I wondered if there was a way to just use arrays, as using an arrayList seems a bit memory intensive for the simple thing I want to do with it.

Thanks for any help,
Tim

PhiLho YaBB Moderator Offline Posts: 4190 Near Paris (France)	Re: Best way to compare two arrays? Reply #1 - May 6^th, 2010, 5:18am kabatwa wrote on May 6^th, 2010, 4:30am: I wondered if there was a way to just use arrays, as using an arrayList seems a bit memory intensive for the simple thing I want to do with it. Don't worry for memory, unless you have millions of strings, and even then data will take more memory than the ArrayList overhead.

kabatwa YaBB Newbies Offline Posts: 21	Re: Best way to compare two arrays? Reply #2 - May 6^th, 2010, 6:26am Yes, ok. Makes sense! I guess I'll do it this way then. Thanks very much! Tim

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