I have a delimited text file (the delimiter is ';') where certain fields consist of many blanks e.g. ; ; and ; ;
Before I separate the data I need to eliminate these blanks altogether.
I tried the sed command using the following syntax:
The * indicates that however many spaces are found between two semi-colons should be replaced by nothing so the string to replace with is an empty string surrounded by two semi-colons.
However I see that this only works on ASCII files whereas my files are ISO-8859. In these files this command doesn't detect multiple spaces with the * character.
Would anyone have some ideas?
Thanks & regards
Tony
Last edited by Don Cragun; 06-25-2014 at 03:43 PM..
Reason: Please use code and icode tags when spaces are important.
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Hi All.
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Discussion started by: Hari Prasanth
2 Replies
LEARN ABOUT V7
lex
LEX(1) General Commands Manual LEX(1)NAME
lex - generator of lexical analysis programs
SYNOPSIS
lex [ -tvfn ] [ file ] ...
DESCRIPTION
Lex generates programs to be used in simple lexical analyis of text. The input files (standard input default) contain regular expressions
to be searched for, and actions written in C to be executed when expressions are found.
A C source program, `lex.yy.c' is generated, to be compiled thus:
cc lex.yy.c -ll
This program, when run, copies unrecognized portions of the input to the output, and executes the associated C action for each regular
expression that is recognized.
The following lex program converts upper case to lower, removes blanks at the end of lines, and replaces multiple blanks by single blanks.
%%
[A-Z] putchar(yytext[0]+'a'-'A');
[ ]+$
[ ]+ putchar(' ');
The options have the following meanings.
-t Place the result on the standard output instead of in file `lex.yy.c'.
-v Print a one-line summary of statistics of the generated analyzer.
-n Opposite of -v; -n is default.
-f `Faster' compilation: don't bother to pack the resulting tables; limited to small programs.
SEE ALSO yacc(1)
M. E. Lesk and E. Schmidt, LEX - Lexical Analyzer Generator
LEX(1)