Hi:
Let's suppose I want to replace all the | by > ONLY when | is between . Usually (and it works) I would do something like
sed -e 's/\(\*\)|\(*\]\)/\1>\2/g'
where I have to "save" some portions of the matched region and use them with the \n metacharacter. I was wondering if I could... (2 Replies)
Hi Gurus,
I have a file say for ex. file1 which has 3500 lines in it which are different account numbers and another file (file2) which has 230000 lines in it. I want to read all the lines in file1 and delete all those lines from file2 which has that same pattern as in file1. I am not quite... (4 Replies)
Hi All ,
Given a file , I need to delete , modify and insert lines matching certain patterns in that file using shell scripting.
e.g. If a file FILE1 has following content :
CUST.ABC.DEF = CUST.ABC.DEF * CUST.ABC.DEF
PRINTF(CUST.ABC.DEF)
CUST.ABC.DEF = mid(CUST.ABC.DEF,10.34)... (5 Replies)
hi,
I have the following file
hello
world
this
is
to
say
bye
to
everyone
so
bye
I want to get the lines from hello to the first bye inclusive into another file?
how can I do this (11 Replies)
Hello all,
I am looking for a solution to the following problem. Perl or python solutions also welcome.
Given this input:
And this input:
I want to get this output.
The rule being that if the number in the first file is < 0.9, then the corresponding two columns on... (2 Replies)
Hi All,
I need a help in the below scenario.
I want to perform few operations as a non root user but those operations can be performed only by the root user. For example I need to modify /etc/hosts file as a non root user. This is just one scenario.
Could you please provide... (3 Replies)
(I am using bash)
I have a command that will find the line number in a file by searching for a string where it exists.
linenumber=$(grep -n "string" $FILENAME | cut -d : -fi)
This returns the line number and removes the string. Now that I have the line number I want to subtract 4 from it and... (5 Replies)
Hi, I need to print lines which are matching with start pattern "SELECT" and END PATTERN ";" and only select the last "select" statement including the ";" .
I have attached sample input file and the desired input should be as:
INPUT FORMAT:
SELECT
ABCD,
DEFGH,
DFGHJ,
JKLMN,
AXCVB,... (5 Replies)
Discussion started by: nani2019
5 Replies
LEARN ABOUT REDHAT
switch
switch(n) Tcl Built-In Commands switch(n)
__________________________________________________________________________________________________________________________________________________NAME
switch - Evaluate one of several scripts, depending on a given value
SYNOPSIS
switch ?options? string pattern body ?pattern body ...?
switch ?options? string {pattern body ?pattern body ...?}
_________________________________________________________________DESCRIPTION
The switch command matches its string argument against each of the pattern arguments in order. As soon as it finds a pattern that matches
string it evaluates the following body argument by passing it recursively to the Tcl interpreter and returns the result of that evaluation.
If the last pattern argument is default then it matches anything. If no pattern argument matches string and no default is given, then the
switch command returns an empty string.
If the initial arguments to switch start with - then they are treated as options. The following options are currently supported:
-exact Use exact matching when comparing string to a pattern. This is the default.
-glob When matching string to the patterns, use glob-style matching (i.e. the same as implemented by the string match command).
-regexp When matching string to the patterns, use regular expression matching (as described in the re_syntax reference page).
-- Marks the end of options. The argument following this one will be treated as string even if it starts with a -.
Two syntaxes are provided for the pattern and body arguments. The first uses a separate argument for each of the patterns and commands;
this form is convenient if substitutions are desired on some of the patterns or commands. The second form places all of the patterns and
commands together into a single argument; the argument must have proper list structure, with the elements of the list being the patterns
and commands. The second form makes it easy to construct multi-line switch commands, since the braces around the whole list make it unnec-
essary to include a backslash at the end of each line. Since the pattern arguments are in braces in the second form, no command or vari-
able substitutions are performed on them; this makes the behavior of the second form different than the first form in some cases.
If a body is specified as ``-'' it means that the body for the next pattern should also be used as the body for this pattern (if the next
pattern also has a body of ``-'' then the body after that is used, and so on). This feature makes it possible to share a single body among
several patterns.
Beware of how you place comments in switch commands. Comments should only be placed inside the execution body of one of the patterns, and
not intermingled with the patterns.
Below are some examples of switch commands:
switch abc a - b {format 1} abc {format 2} default {format 3}
will return 2,
switch -regexp aaab {
^a.*b$ -
b {format 1}
a* {format 2}
default {format 3}
}
will return 1, and
switch xyz {
a
-
b
{
# Correct Comment Placement
format 1
}
a*
{format 2}
default
{format 3}
}
will return 3.
SEE ALSO
for(n), if(n), regexp(n)
KEYWORDS
switch, match, regular expression
Tcl 7.0 switch(n)