Substituting comma "," for dot "." in a specific column when comma"," is a delimiter Post: 302651479

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Top Forums Shell Programming and Scripting Substituting comma "," for dot "." in a specific column when comma"," is a delimiter Post 302651479 by ddreggors on Tuesday 5th of June 2012 02:46:02 PM

06-05-2012

Registered User

@Scrutinizer:
Very nice!

I had come up with a similar sed command but not nearly as elegant.

Code:

$ sed -r 's/([0-9]+),([0-9]+),([0-9]+),/\1,\2.\3,/g' ./text.txt 
('BLABLA +200-GRS','Serviç','TarifaçServiç,'wap.bla.us.0000000121',2985,0.55,' de conversãem escada','Dia','Domingos')
('BLABLA +200-GRR','Serviç','TarifaçServiç,'wap.bla.us.0000000121',2985,0.55,' de conversãem escada','Reduzido','Sádos')
('BLABLA 45-GPR','Serviç','TarifaçServiç,'canais.bla.us.0000000222',3073,0,' de conversãde diferenç,'Noite','Sádos')
('BLABLA 45-GPR','Serviç','TarifaçServiç,'canais.bla.us.0000000222',3073,0,' de conversãde diferenç,'Noite','Segunda - Sexta')
('BLABLA 35-GMS','Serviç,'TarifaçServiç,'VC3 XXXX YYY-Fixo TIM(on)',3121,1.21,' de conversãem escada','Noite','Segunda - Sexta')
('BLABLA-GRN','Serviç,'TarifaçServiç,'Chamadas',1362,1.961,' de conversãem escada','Noite','Segunda - Sexta')
('BLABLA-GPE','Serviç,'TarifaçServiç,'Chamadas',1362,1.9897,' de conversãem escada','Dia Todo','Domingos')

Mine matches on (and keeps) 3 consecutive number columns and replaces the comma for a period in the appropriate place when found.

You approach is very similar but far more compact and elegant.

Correct me if I am wrong, but I will try to explain for those that do not understand that sed command.

The match side of the command matches on any text that starts with a comma and *does not* have a single quote after it. Since numbers are not contained in single quotes it will only ever match (and keep) the number fields.

Next he tells the replace side of the sed command to replace the comma and number with a period and number, but only on the 3rd match.

so in plain text:

,11,22,33 would become ,11,22.33 as the first and second commas are left as is!

ddreggors

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mdb-tables

MDBTools(1)															       MDBTools(1)

NAME

       mdb-tables - Get listing of tables in an MDB database

SYNOPSIS

       mdb-tables [-S] [-1 | -d delimiter] database

DESCRIPTION

       mdb-tables is a utility program distributed with MDB Tools.

       It produces a list of tables contained within an MDB database in a format suitable for use in shell scripts.

OPTIONS

       -S     Show system tables. System tables are generally those beginning with 'MSys'

       -1     specifies that the tables should be listed 1 per line.

       -d delimiter
	      specifies an alternative delimiter. If no delimiter is specified, table names will be delimited by a tab character, or by newline if
	      the -1 option was specified.

NOTES

ENVIRONMENT

       MDB_JET3_CHARSET
	      Defines the charset of the input JET3 (access 97) file. Default is CP1252. See iconv(1).

       MDBICONV
	      Defines the output charset. Default is UTF-8. mdbtools must have been compiled with iconv.

       MDBOPTS
	      semi-column separated list of options:

	      o  use_index

	      o  no_memo

	      o  debug_like

	      o  debug_write

	      o  debug_usage

	      o  debug_ole

	      o  debug_row

	      o  debug_props

	      o  debug_all is a shortcut for all debug_* options

HISTORY

       mdb-tables first appeared in MDB Tools 0.3.

SEE ALSO

       gmdb2(1) mdb-export(1) mdb-hexdump(1) mdb-prop(1) mdb-sql(1) mdb-ver(1) mdb-array(1) mdb-header(1) mdb-parsecsv(1) mdb-schema(1)

AUTHORS

       The mdb-tables utility was written by Brian Bruns.

BUGS

       Access allows for tables to have spaces embeded in the table name.
	      You must specify a delimiter (-d) if you intend on piping the output of mdb-tables to a program such as awk or cut.

0.7								   13 July 2013 						       MDBTools(1)