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Shell Programming and Scripting

Make the first character uppercase

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Top Forums Shell Programming and Scripting Make the first character uppercase
# 8  
Old 11-18-2010
Quote:
Originally Posted by Franklin52
Code:
awk -F "" '{$1=toupper($1)}1' OFS= file

Explanation:
Code:
awk -F ""	# set fieldseparator to "", now a field is one character
$1=toupper($1)	# make the first character uppercase
1		# if the condition is true (1 = true) without an action, awk prints the current line per default
OFS=		# set output field separator to ""

Thank you so much,
It's cool to write AWK code this way, but it's kinda tricky, I guess you are a BIG fan of Perl...Smilie

It would be more understandable written like this:
Quote:
awk -F "" '{$1=toupper($1); print}' OFS=""
# 9  
Old 11-18-2010
Quote:
Code:
sed 's/^./\u&/' file

Note that the above only works for GNU sed.
# 10  
Old 02-16-2011
My 2 cents:

Code:
$ var=abc
$ echo -n ${var:0:1} | tr -s '[:lower:]' '[:upper:]' && echo ${var:1}
Abc

---------- Post updated 02-16-11 at 10:44 AM ---------- Previous update was 02-15-11 at 11:04 PM ----------

My other 2 cents:

Code:
$ value=lowercase
$ echo ${value^?}
Lowercase

Search for section "Case modification" on bash's man page.
Seems to work only for bash >= 4.
Last edited by caruccio; 02-16-2011 at 08:49 AM..
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