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  • Which programming language? And computers are notably bad at dealing with "infinite streams" of anything. Commented Mar 4, 2010 at 18:25
  • If you care to read there is pretty loooong article enfranchisedmind.com/blog/posts/problems-with-hash-tables Commented Mar 4, 2010 at 18:34
  • Okay. Not infinite but imagine that there is a stream of numbers coming in real-time. Is hashtable Vs array language dependent ? I was thinking more on the conceptual level which one would be a better choice if you needed to calculate how many times a no. is occurred in a stream of numbers. Commented Mar 4, 2010 at 18:36