Comparing two elements on page with selenium getHashCode() function, c#

Asked Mar 02 '21 at 18:30

Active Mar 02 '21 at 19:02

Viewed 25 times

I have two elements on a page that I am grabbing. I am using the selenium getHashCode function to compare the two elements to make sure they are different.

  if ((oldQ.GetHashCode() != newQ.GetHashCode())
{
      //Do Something
}

Is it dangerous to use the GetHashCode function? I have checked the values and they seem to be unique. These two elements keep changing and I'm not dealing with many elements.

edited Mar 02 '21 at 19:02

Daniel A. White

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asked Mar 02 '21 at 18:30

JabbaaAAA

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gethashcode is not guaranteed to define equality - collisions could happen. you should investigate what selenium allows for comparing elements. – Daniel A. White Mar 02 '21 at 18:45
@DanielA.White What is the chance of a collision? – JabbaaAAA Mar 02 '21 at 18:50
it depends on the implementation under the covers- since its just an int, theres over 4 billion possibilities. – Daniel A. White Mar 02 '21 at 18:51
related: https://stackoverflow.com/questions/11607206/string-gethashcode-uniqueness-and-collisions – Daniel A. White Mar 02 '21 at 18:52
why u use `GetHashCode()` for comparing? I hope this https://learn.microsoft.com/en-us/dotnet/api/system.collections.comparer.compare?view=net-5.0 helps you – Amirhossein Azhdari Mar 02 '21 at 18:53
@DanielA.White Thank you! Also, if both elements have the same text contents, wouldn't they have the same hash? – JabbaaAAA Mar 02 '21 at 18:53
not in all cases - what if they are different classes, ids, etc. you have to implement the meaning of equality in this case – Daniel A. White Mar 02 '21 at 18:54

Comparing two elements on page with selenium getHashCode() function, c#

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