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toupper or tolower case of first letter of the line depending on another file

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# 1  
Old 12-29-2011
toupper or tolower case of first letter of the line depending on another file
Hi

I would like to read if the first letter of a line in a first file (gauche.txt) is uppercase or lowercase, and change consequently the first letter of the corresponding line in the second file (droiteInit.txt).
I have done this but it won't work (I launch this using gawk -f ./awk_lowercasesUppercases gauche.txt )


Code:
# initialize strings 
BEGIN { upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; 
        lower = "abcdefghijklmnopqrstuvwxyz"; 
        fichierLinenumberLower="LinenumberLower.txt"; 
        fichierLinenumberUpper="LinenumberUpper.txt";
        fichierdroite="droite.txt";
        linenumber = 1;
        NR==FNR; 
} 
 
# for each input line 
{ 
    # get first character of first word 
    FIRSTCHAR = substr($1, 1, 1); 
 
    # if lower get position of FIRSTCHAR in lowercase array; if 0, ignore 
    if (CHAR = index(lower, FIRSTCHAR)){  
#print linenumber > fichierLinenumberLower;
            {next}
            {
            FIRSTCHARdroite = substr($1, 1, 1);
#print FIRSTCHARdroite
#print toupper(FIRSTCHARdroite)
            sub(/^./,toupper(FIRSTCHARdroite),$0);
            print $0;
            } 
        }
         
    # if upper get position of FIRSTCHAR in uppercase array; if 0, ignore 
    if (CHAR = index(upper, FIRSTCHAR)){
            {next}
            { 
#print linenumber > fichierLinenumberLower;
            FIRSTCHARdroite = substr($1, 1, 1);
#print FIRSTCHARdroite
#print tolower(FIRSTCHARdroite)
            sub(/^./,tolower(FIRSTCHARdroite),$0);
            print $0; 
            } 
        } 
 
    linenumber=linenumber+1; 
}

Can you help me please?
Thanks
Last edited by louisJ; 12-29-2011 at 05:35 PM..
# 2  
Old 12-29-2011
Hi louisJ,

Can you paste part of file 'gauche.txt', the incorrect ouput you get and the correct output you except? or the error in case of a incorrect syntax of your 'awk' program?

Regards,
Birei
# 3  
Old 12-29-2011
FWIW - some versions of awk support tolower() and toupper() natively.
Check your documentation.
# 4  
Old 12-30-2011
Gawk supports toupper and tolower, I checked.

gauche.txt looks like this:
Code:
Sized to 
Durable, midweight,
ultraviolet protection
quick flo

DroiteInit.txt:
Code:
Dimensionné 
nylon durable 
Indice de Protection 
séchant flo

The result should be like this:
Code:
Dimensionné 
Nylon durable 
indice de Protection 
séchant flo

I want to obtain the same capitalization in the resulting file than in gauche.txt.
# 5  
Old 12-30-2011
If you want to go on with awk:
Code:
awk 'NR==FNR{a=substr($0,1,1);b[FNR]=match(a,/[A-Z]/) ? 1 : 0;next}
{c=substr($0,1,1);c=b[FNR] ? toupper(c):tolower(c);print c""substr($0,2)}'  gauche.txt DroiteInit.txt
Dimensionné 
Nylon durable 
indice de Protection 
séchant flo

This User Gave Thanks to Klashxx For This Post:
louisJ
# 6  
Old 12-30-2011
Beautiful, thank you Klashxx
# 7  
Old 12-30-2011
Quote:
Originally Posted by Klashxx
If you want to go on with awk:
Code:
awk 'NR==FNR{a=substr($0,1,1);b[FNR]=match(a,/[A-Z]/) ? 1 : 0;next}
{c=substr($0,1,1);c=b[FNR] ? toupper(c):tolower(c);print c""substr($0,2)}'  gauche.txt DroiteInit.txt

This doesn't work, every first letter ouputs in uppercase....I talked too fast!
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