advantaje using Expressiones

[Stephen Lime]

Examples 1 and 3 have the wrong syntax. You can do regex expresions like:

CLASSITEM PERIODO
CLASS
  EXPRESSION /^Paleogeno$/
  ...
END

You can also do regex in a logical expression like:

CLASS
  EXPRESSION ('PERIODO]' =~ /^Paleogeno$/
  ...
END

Note there is no CLASSITEM. You could even just do a string comparison:

CLASSITEM PERIODO
CLASS
  EXPRESSION "Paleogeno"
  ...
END

Example 2 should work just like the one immediately above, but is less efficient. It uses
a straight strcmp so it doesn't seem possible that it also matches strings ending in 'geno'.
Are you sure about that behavior?

Steve


Stephen Lime
Internet Applications Analyst

Minnesota DNR
500 Lafayette Road
St. Paul, MN 55155
651-297-2937

>>> bertha amalia serrato de la cruz <bertha_bonita at yahoo.com> 03/07/01 01:48PM >>>
hello
i have a problem

when i want to use an expreesiones like a 
EXPRESSION ('[PERIODO]' eq '^Paleogeno$') Don't Work

EXPRESSION ('[PERIODO]' eq  'Paleogeno') work but no
correctly because give me Paleogeno and all the word
ending wtih "geno"

EXPRESSION ('^Paleogeno$')   don't work

i don't know how can i resolve this problem, i'm
getting worried about it.


Which are the advantages using expressions????



=====
*--*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-
    Lic. Ciencias Computacionales Bertha A. Serrato
    bserrato at cicese.mx 
    CICESE,División de Ciencias de la Tierra.
    Ensenada, B.C.
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-

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