Hi,
I have following format in file aaa with content below, and would like to seek help from forumer about how to change and swap the position on 2nd field.
5874957|901125|
95874960|650614|
95874966|870308|
901125 to be changed as 25-11-1990 for eg
Can someone help please ?? :)
... (6 Replies)
Hi All,
I wish to cut an input by using the below command but i would want to have the cut position as a variable.
For eg, the position number is 11 now and i wish that this number is being assigned to a variable before putting into the cut function.
Can this be done ?
Can any expert help?... (1 Reply)
I need help in removing a leading zero in a particular position.
For eg.: XYZ*04567472*0099*020091231*0123*0.12
In the above line, I want to replace "*0123" with "123" and "0.12" with ".12". I want to remove the leading zero only in position number 4 and 5 (the bolded segments)
I was able... (10 Replies)
Hi everyone,
Please some help over here. (I´m using cygwing)
I have files with 40 columns and 2000 lines in average. I´m trying to change the order position as follow.
Original columns position:... (3 Replies)
I want to remove text from nth position to nth position couple of times in same line
my line is
"hello is there anyone can help me with this question"
I need like this
ello is there anyone can help me with question
'h' is removed and 'this' removed from the line. I want to do this... (5 Replies)
Hi all
let's say i have a file named 1234_v2_abcd
i need to find the position of the character located after _v, in above case this would be character number 2
the count of the characters before _v can change, but i always have a number after _v
can anybody help :) (4 Replies)
Hi All,
input file:
echo "a|b|c|d|test|123|same" | awk 'BEGIN {FS=OFS="|"} {print $1,$2,$7,$4,$5,$6}'
Got Output :
a|b|same|d|test|123
This is the sample input file with less fields. But my original file contains more field values. How to replace last value to 3rd postion value. Because... (8 Replies)
Hi I have a text file that I want to change some of the characters based on their position. My file contain multiple lines and characters should be counted continuously line by line. For example, I want to convert the 150th T to C. What can I do? Here is a portion of my file:... (10 Replies)
Goodmorning,
I know how to cut a string and a column, and how to find a word.
I have a file with over 100 columns. All columns have a title in the first line. I have to delete all columns with the XXX title.
I can't use cut -f because the position of XXX columns change in each file, and in... (14 Replies)
I have a file which records banking transactions say like below.
user1 has deposited 10,000$ in his account
user2 has deposited 11,000$ in his account
user1 has withdraw today 5000$ from his account.
Lets say i read this file and convert each line as a list.
username= word
action=... (1 Reply)
Discussion started by: sahil_shine
1 Replies
LEARN ABOUT OSF1
unifdef
unifdef(1) General Commands Manual unifdef(1)NAME
unifdef - Removes #ifdefed lines
SYNOPSIS
unifdef [-tlc] [-Dsymbol] [-idsymbol] [-iusymbol] [file] [-Usymbol]
The unifdef command partially simulates the behavior of the C preprocessor in processing #ifdef conditionals.
OPTIONS
Complements the action of unifdef; retains lines that would normally be removed and removes lines that would normally be retained. Speci-
fies symbol as a defined #ifdef symbol. Specifies defined lines inside certain #ifdefs to be ignored but copied out. Specifies undefined
lines inside certain #ifdefs to be ignored and not copied out. Replaces removed lines with blank lines instead of deleting them. Pro-
cesses plain text (rather than C code) input. The unifdef command does not try to recognize comments, single quotes, and double quotes.
Specifies symbol as an undefined #ifdef symbol.
DESCRIPTION
The unifdef command recognizes nested #ifdefs, comments, single and double quotes of C syntax so that it can function correctly, but does
not include files or interpret macros. The unifdef command recognizes, but does not remove comments.
The unifdef command takes its input from stdin if no file argument is given, and copies its output to stdout.
You specify the symbols you want defined with -Dsymbol or undefined with -Usymbol and the lines inside those #ifdefs are copied to the out-
put or removed, as appropriate. The #ifdef, #ifndef, #else, #elif, and endif lines associated with symbol are also removed. The #ifdefs
involving unspecified symbols are untouched and copied out along with their associated #ifdef, #else, elif, and #endif lines. If the same
symbol appears in more than one argument, only the first occurrence is significant. For instance, if an #ifdef X occurs nested inside
another #ifdef X, the inside #ifdef is considered an unrecognized symbol.
If you use #ifdefs to delimit non-C lines, such as comments or unfinished code, it is necessary to specify which symbols are to be used for
that purpose. Otherwise, the unifdef command tries to parse for quotes and comments in those #ifdef lines.
Keywords
The following keywords can be used with the unifdef command:
ifdef ifndef else endif elif
The unifdef command uses the elif keyword as follows. (Note that "Understood" means unifdef knows how to convert elif to if.) Understood
Not understood Not understood
For example:
# ifdef X x # elif defined (Y) y # elif defined (A) || defined (B) a # else default # endif
The following list shows the results of using the elif keyword with variables:
-DX x
-UX # if defined (Y) y # elif defined (A) || defined (B) a # else default # endif -UX -DY y
-UY -UX # if defined (Y) y # elif defined (A) || defined (B) a # else default # endif
-UY -UX -DA # if defined (Y) y # elif defined (A) || defined (B) a # else default # endif
NOTES
The unifdef command cannot process cpp constructs such as:
#if defined(X) || defined(Y)
DIAGNOSTICS
The unifdef command can fail for several reasons: a premature end of file, or an inappropriate else, elif, or endif.
EXIT STATUS
Exit status is 0 if output is an exact copy of input, 1 if not, 2 if the unifdef command fails.
EXAMPLES
The following command line causes the unifdef command to read the file original.c and remove the #ifdef A lines. It then removes every-
thing following an #elif/#else associated with the #ifdef A down to the #endif: unifdef -DA original.c > modified.c The following command
line causes the unifdef command to read the file original.c, and remove the #ifdef A down to either its associated #elif/#else, or its
associated #endif: unifdef -UA original.c > modified.c
In the case of the #elif, the #elif is replaced with #if. In the case of #else, the #else is deleted along with its associated
#endif.
SEE ALSO
Commands: diff(1)unifdef(1)