in reply to Limit the size of a hash

There is an anomaly in what you are seeking to do.

And 8GB file of 12 character lines gives ~715 million lines.

With the selection value being a value between 0.00 & 0.99, there are only 100 possible values; which means that there could be an average of ~7 million of each value. Which 10 of the 7 million 0.99 value liens do you want?

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Re^2: Limit the size of a hash
by brx (Pilgrim) on Sep 05, 2013 at 09:46 UTC

    Pigeonhole principle :-)

    English is not my mother tongue.
    Les tongues de ma mère sont "made in France".
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[d/l]

      Or perhaps the OP actually wants all the records that contain the top 10 values.

      Eg. ~7 million * 0.99; ~7 million * 0.98; ...

      With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
      Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
      "Science is about questioning the status quo. Questioning authority".
      In the absence of evidence, opinion is indistinguishable from prejudice.
[reply]
Re^2: Limit the size of a hash
by nevdka (Pilgrim) on Sep 06, 2013 at 01:46 UTC

    That assumes a flat distribution. If it was normally distributed with a sufficiently small standard deviation (0.1 would work, according to the back of my envelope) then talking about the top 10 would make sense.

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