& is only special in the replacement text. It is an ordinary character in the regular expression. In the regular expression, the sequence \& yields undefined behavior. It will probably work as intended with most implementations, but it's not required to.
Hi, I am trying something like this: Let's say I have a file called File1 with contents:
x=-0.3
y=2.1
z=9.0
I have another file, File2, with contents:
xx=
yy=
zz=
(nothing after "="). What I want to do is get the value of x in File1 and set it to xx in File2, i.e., xx=-0.3. And the... (3 Replies)
script is as below
v_process_run=5
typeset -i p_cnt=0
pdata=/home/proc_data.log
while
do
# execute script in background
dummy_test.sh "a1" "a2" &
p_cnt=$p_cnt+1
echo "data : $p_cnt : Y" >> $pdata
done
file created with following data in... (1 Reply)
I have a text file with following content (3 lines)
filename : output.txt
first line:12/12/2008
second line:12/12/2008
third line:Y
I would like to know how we can replace 'Y' with 'N' in the 3rd line keeping 1st and 2nd lines same as what it was before.
I tried using cat output.txt... (4 Replies)
i am very new to UNIX
plz help me in this scenario
i have two text files as below
file1.txt
name=Rajakumar.
Discipline=Electronics and communication.
Designation=software Engineer.
file2.txt
name=Kannan.
Discipline=Mechanical.
Designation=CADD Design Engineer.
... (6 Replies)
Hi all,
I have a requirement where i have to search data between strings 'SELECT' and ';' and replace this text as "SELECT.....;" so that i can export this extracted string into a excel cell.
Please suggest on this. (5 Replies)
hello all
greeting for the day
i have a text file as the following
text.xml
abcd<FIELD>123.456</FIELD>efgh
i need to replace the value between <FIELD> and </FIELD> by using awk command.
please throw some light on this.
thank you very very much
Erik (5 Replies)
Hi There...
I need to serach and replace a strings in a text file.
My file has; books.amazon='Let me read' and the output needed is
books.amazon=NONFOUND
pls if anybody know this can be done in script sed or awk.. i have a list of different strings to be repced by NONFOUND.... (7 Replies)
Hi
I am new to unix and newbie to this forum. I need help in writing a gawk script that search and replace particular text in a flat file.
Input file text :
ZIDE_CONTROL000 100000000003869920900000300000001ISYNC 000002225489 0000000002232122 20120321 16:40:53
ZIDE_RECORD000... (5 Replies)
Hello,
Some time ago a helpful awk file was provided on the forum which I give below:
NR==FNR{A=$0;next}{for(j in A){split(A,P,"=");for(i=1;i<=NF;i++){if($i==P){$i=P}}}}1
While it works beautifully on English and Latin characters i.e. within the ASCII range of 127, the moment a character beyond... (6 Replies)
Hi there,
First of all this is my first post here. Thank you in advance for your help.
What I am trying to do is the following. I have a text file where each field of each row is separated by a tabulator.
Looks like this:
ATOM 1 N HSE A 26 3.033 -10.429 -2.262 1.00 17.07 ... (8 Replies)
Discussion started by: doom4
8 Replies
LEARN ABOUT ULTRIX
expr
expr(1) General Commands Manual expr(1)Name
expr - evaluate expressions
Syntax
expr arg...
Description
The arguments are taken as an expression. After evaluation, the result is written on the standard output. Each token of the expression is
a separate argument.
The operators and keywords are listed below. The list is in order of increasing precedence, with equal precedence operators grouped.
expr | expr Yields the first expr if it is neither null nor 0. Otherwise yields the second expr.
expr & expr Yields the first expr if neither expr is null or 0. Otherwise yields 0.
expr relop expr The relop is one of < <= = != >= > and yields 1 if the indicated comparison is true, '0' if false. The comparison is
numeric if both expr are integers, otherwise lexicographic.
expr + expr
expr - expr
Yields addition or subtraction of the arguments.
expr * expr
expr / expr
expr % expr
Yields multiplication, division, or remainder of the arguments.
expr : expr The matching operator compares the string first argument with the regular expression second argument; regular expres-
sion syntax is the same as that of The (...) pattern symbols can be used to select a portion of the first argument.
Otherwise, the matching operator yields the number of characters matched ('0' on failure).
( expr ) parentheses for grouping.
Examples
The first example adds 1 to the Shell variable a:
a=`expr $a + 1`
The second example finds the file name part (least significant part) of the pathname stored in variable a,
expr $a : '.*/(.*)' '|' $a
Note the quoted Shell metacharacters.
Diagnostics
The command returns the following exit codes:
0 The expression is neither null nor '0'.
1 The expression is null or '0'.
2 The expression is invalid.
See Alsoed(1), sh(1), test(1)expr(1)