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MathGroup Archive 2005

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meaning of a "*" in search string?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg56851] meaning of a "*" in search string?
  • From: "steve" <nma124 at hotmail.com>
  • Date: Sat, 7 May 2005 15:35:11 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

hi;

I have thought that a "*" is a wild card for string matching,
which is supposed to match anything including the empty string?

Then, can someone explain why `* does not produce
anything But `*`* does below?


Names["SignalProcessing`Analog`*"]
   {}

Names["SignalProcessing`Analog`*`*"]
  {SignalProcessing`Analog`Fourier`Private`a,
   etc...

The above makes no sense to me at all. This is the
help on Names:

  ?Names
  Names["string"] gives a list of the names of
  symbols which match the string.

so, then means the string "abs`*"  should generate a result,
if the string "abc`*`*" does , which it did !

Does Mathematica uses a different definition of the "*" for
string matching than the one we learned in school?

Steve


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