I want to merge these two files as
i.e. skip the TAILER line of file A and skip the HEADER and Comment Line of fileB
I am able to do it using the below perl code
This code works fine, however I doubt it's efficiency if fileA and fileB are going to be millions of lines (which is the case)
i.e. why read whole file in arrays just to get rid of three lines (will end up using lots of memory)
Can someone suggest a more efficient way of doing this
(answers in perl only)
Last edited by sam05121988; 06-12-2014 at 04:15 AM..
I have an inventory program that I would like to have the ability to go and change or alter the field data based on the item number as a key. I have the menu option set but at the end of the script process it just appends the changed data to the database rather than what I would like; which is to... (5 Replies)
hi friens, :)
if i need to find files with extension .c++,.C++,.cpp,.Cpp,.CPp,.cPP,.CpP,.cpP,.c,.C
wat is the pattern for finding them
:confused: (2 Replies)
I want to change a number in a file into number -1..
for instance
file_input is
fdisdlf_s35
fdjsk_s27
fsdf_s42
jkljllljkkl_s57
... etc
now i want the output to be
fdisdlf_s34
fdjsk_s26
fdsf_s41
jkljllljkkl_s56
... etc
I was think of using "sed -e 's/2/1/g' -e 's/3/2/g' -e... (4 Replies)
Hi Experts,
I want to alter two filed of my data file: The _new should come to 2nd column, and _new to be removed from 4rth column, please advise,
datafile.txt
aa /dev/vgAA/lvol1 bb /dev/vgAA_new/lvol1
aa /dev/vgAA1/lvol2 bb /dev/vgAA1_new/lvol2
aa /dev/vgAC/lvol1 bb... (5 Replies)
I have 2 arrays,
@array1 contains records in the format
1|_|X|_|ssd|_|
4|_|H|_|hbd|_|
9|_|Y|_|u8gjdfg|_|
@array2 contains records in the format
X|_|asdf|_|
Y|_|qwer|_|
A|_|9kdkf|_|
@array3 should contain records in the PLz
X|_|ssd|_|asdf|_|
Y|_|hdb|_|qwer|_|
PLZ dont use... (2 Replies)
We have a requirement where we get the Delta Files in every one hour and we need to load them into Oracle database every one hour using Powercenter. To efficiently do this we need to build an File management system.
Here is our process:
we get 6 files for 6 tables with a timestamp appended... (2 Replies)
file1.txt
1 2
10 11
56 57
7 8
43 44
and let's suppose that there is a file called file2.txt with 100 columns
I want to produce a file3.txt with columns specified in file1.txt in that order (1,2,10,11,56,57,7,8,43,44)
Thanks! (2 Replies)
Hi,
I'm not a regular coder but some times I write some basic perl script, hence Perl is bit difficult for me :).
I'm merging two files a.txt and b.txt into c.txt:
a.txt
------
x001;frtb70;xyz;109
x001;frvt65;sec;239
x003;wqax34;jul;659
x004;yhud43;yhn;760
b.txt
------... (8 Replies)
Can I take an argument input, lets say it's, hg0000_xy1_v2, in the script it becomes f ... then hack off the end of the filename to change the variable to hg0000 only.
I tried using sed but can't figure it out.
f="$f" | sed 's/_fg_v//'
I could change the variable label if necessary to... (4 Replies)
I have a script I am trying to test and run but it runs against a jar file. I wrote an external property file so it would redirect with my script, but it keeps going in search of the previous property file. Is there any way to externally over write the jar file and if not how do you go about... (7 Replies)
Discussion started by: risarose87
7 Replies
LEARN ABOUT LINUX
erl_comment_scan
erl_comment_scan(3erl) Erlang Module Definition erl_comment_scan(3erl)NAME
erl_comment_scan - Functions for reading comment lines from Erlang source code.
DESCRIPTION
Functions for reading comment lines from Erlang source code.
DATA TYPES
comment() = {integer(), integer(), integer(), [string()]} :
EXPORTS
file(FileName::filename() (see module file)) -> [Comment]
Types Comment = {Line, Column, Indentation, Text}
Line = integer()
Column = integer()
Indentation = integer()
Text = [string()]
Extracts comments from an Erlang source code file. Returns a list of entries representing multi-line comments, listed in order of
increasing line-numbers. For each entry, Text is a list of strings representing the consecutive comment lines in top-down order; the
strings contain all characters following (but not including) the first comment-introducing % character on the line, up to (but not
including) the line-terminating newline.
Furthermore, Line is the line number and Column the left column of the comment (i.e., the column of the comment-introducing % char-
acter). Indent is the indentation (or padding), measured in character positions between the last non-whitespace character before the
comment (or the left margin), and the left column of the comment. Line and Column are always positive integers, and Indentation is a
nonnegative integer.
Evaluation exits with reason {read, Reason} if a read error occurred, where Reason is an atom corresponding to a Posix error code;
see the module file(3erl) for details.
join_lines(Lines::[CommentLine]) -> [Comment]
Types CommentLine = {Line, Column, Indent, string()}
Line = integer()
Column = integer()
Indent = integer()
Comment = {Line, Column, Indent, Text}
Text = [string()]
Joins individual comment lines into multi-line comments. The input is a list of entries representing individual comment lines, in
order of decreasing line-numbers ; see scan_lines/1 for details. The result is a list of entries representing multi-line comments,
still listed in order of decreasing line-numbers , but where for each entry, Text is a list of consecutive comment lines in order of
increasing line-numbers (i.e., top-down).
See also: scan_lines/1 .
scan_lines(Text::string()) -> [CommentLine]
Types CommentLine = {Line, Column, Indent, Text}
Line = integer()
Column = integer()
Indent = integer()
Text = string()
Extracts individual comment lines from a source code string. Returns a list of comment lines found in the text, listed in order of
decreasing line-numbers, i.e., the last comment line in the input is first in the resulting list. Text is a single string, contain-
ing all characters following (but not including) the first comment-introducing % character on the line, up to (but not including)
the line-terminating newline. For details on Line , Column and Indent , see file/1 .
string(Text::string()) -> [Comment]
Types Comment = {Line, Column, Indentation, Text}
Line = integer()
Column = integer()
Indentation = integer()
Text = [string()]
Extracts comments from a string containing Erlang source code. Except for reading directly from a string, the behaviour is the same
as for file/1 .
See also: file/1 .
AUTHORS
Richard Carlsson <richardc@it.uu.se >
syntax_tools 1.6.7 erl_comment_scan(3erl)