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Full Discussion: Compare - 1st col of file
Top Forums Shell Programming and Scripting Compare - 1st col of file Post 302353484 by ripat on Tuesday 15th of September 2009 12:11:37 PM
Old 09-15-2009
Just realised that I used vgersh99's solution. Here are the updated result with Franklin52's one.

with nawk:
real 0m0.279s
user 0m0.272s
sys 0m0.008s

with mawk:
real 0m0.141s
user 0m0.084s
sys 0m0.016s

with the cat | cut | sort | uniq
real 0m0.943s
user 0m0.888s
sys 0m0.052s
 

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GRIB_GET_DATA(1)						   User Commands						  GRIB_GET_DATA(1)

NAME
grib_get_data - Print a latitude, longitude, data values list DESCRIPTION
Print a latitude, longitude, data values list USAGE
grib_get_data [options] grib_file grib_file ... OPTIONS
-M Multi-grib support off. Turn off support for multiple fields in single grib message -m missingValue The missing value is given through this option. Any string is allowed and it is printed in place of the missing values. Default is to skip the missing values. -p key[:{s/d/l}],key[:{s/d/l}],... Declaration of keys to print. For each key a string (key:s) or a double (key:d) or a long (key:l) type can be requested. Default type is string. -R out_file_name Redirect the standard output to "out_file_name". Faster than the shell redirect (>) because buffered. -F format C style format for values. Default is "%.10e" -w key[:{s/d/l}]{=/!=}value,key[:{s/d/l}]{=/!=}value,... Where clause. Grib messages are processed only if they match all the key/value constraints. A valid constraint is of type key=value or key!=value. For each key a string (key:s) or a double (key:d) or a long (key:l) type can be specified. Default type is string. -f Force. Force the execution not to fail on error. -G GRIBEX compatibility mode. -7 Does not fail when the message has wrong length -V Version. AUTHOR
This manpage has been autogenerated by Enrico Zini <enrico@debian.org>from the command line help of grib_get_data. grib_get_data April 2009 GRIB_GET_DATA(1)
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