I have the following string : Cat dog fox catepillar bear foxy
I need to replace "cat" and "fox" words from this sentence to word "animal"
I do the following:
But the problem that word's "catepillar" and "foxy" parts("cat" and fox) also are replaced. How to replace only words "cat" and "fox"?
I want to replace a string within a file using perl.
We have a line that gets commented out, and I want to replace that line now matter how it was commented out.
for example, I'd want to replace
###ES=PR1A with ES=PR1A
or
##LJW(9/16/26)ES=PR1A with ES=PR1A
I tried: perl... (4 Replies)
Hi using the below cmd i am identifying wheether last character in each line in thousands of files as semicolon or not.If last character is semicolon i am removing semicolon .If last character is not semicolon then i am appending next line to present line .
For example my input file consists of... (4 Replies)
I used the eval command in shell programming for assigning a value to a stored value of a variable.
Example:
VAR="Unix_Id"
eval $VAR="101"
eval echo $"$VAR"
How can i assign a value to a stored value of a variable in perl OR how i can write above code in Perl?
I need your help... (4 Replies)
Example contents of a file:
001FILE
002FILE
003FILE
099FILE
111FILE
Is it possible to search for FILE and still keep the number part of the result in tact? The number portion is a changing variable but the FILE part stays the same. I want to search for all FILE and space them out to "001... (6 Replies)
Hey all, Im trying to write a script on windows, which Im not too familiar with. Im generally a bash scripting guy but am using perl for this case.
My question is...
I have this exact output:
2 Dir(s) 6,380,429,312 bytes free
and I just need to get the number out... (4 Replies)
Hi,
I have 3 arrays:
@arr1=("Furthermore, apigenin treatment increased the level of association of the RNA binding protein HuR with endogenous p53 mRNA","one of the mechanisms by which apigenin induces p53 protein expression is enhancement of translation through the RNA binding protein... (1 Reply)
Hi,
Now i work in a code that
1-get data stored in the database in the form of hash table with a key
field which is the " Name"
2-in the same time i open a txt file and loop through it word by word
3- which i have a problem in is that :
I need to loop word by word and check if it is a... (0 Replies)
Hello,
I have the following perl array:
@longname = (Fasthernet0/0 Fasthernet0/1 Serial0/1/0 Serial0/2/1 Tunnel55 Tunnel77)
with the followinh array:
@shortname = (Fa0/0 Fa0/1 Se0/1/0 Se0/2/1 Tu55 Tu77)
in other words, I need to remove the following from each element in the array... (4 Replies)
Hi,
i've a string
/u/user/DTE/T_LOGS/20110622_011532_TEST_11_HD_120/HD/TESi T_11_HD_120/hd-12
i need to get string, like
/u/user/DTE/T_LOGS/20110622_011532_TEST_11_HD_120/HD
the words from HD should get deleted, i need only a string till HD, i dont want to use any built in... (4 Replies)
hi all, I'm new there, I'm just playing with perl and lwp and I just successfully created a script for log in to a web site with post. I have a response but I would like to have something like this:
I have in my response lines like:
<div class="sender">mimi020</div>
<some html code.....>... (3 Replies)
Discussion started by: vogueestylee
3 Replies
LEARN ABOUT MOJAVE
perlrequick
PERLREQUICK(1) Perl Programmers Reference Guide PERLREQUICK(1)NAME
perlrequick - Perl regular expressions quick start
DESCRIPTION
This page covers the very basics of understanding, creating and using regular expressions ('regexes') in Perl.
The Guide
Simple word matching
The simplest regex is simply a word, or more generally, a string of characters. A regex consisting of a word matches any string that
contains that word:
"Hello World" =~ /World/; # matches
In this statement, "World" is a regex and the "//" enclosing "/World/" tells Perl to search a string for a match. The operator "=~"
associates the string with the regex match and produces a true value if the regex matched, or false if the regex did not match. In our
case, "World" matches the second word in "Hello World", so the expression is true. This idea has several variations.
Expressions like this are useful in conditionals:
print "It matches
" if "Hello World" =~ /World/;
The sense of the match can be reversed by using "!~" operator:
print "It doesn't match
" if "Hello World" !~ /World/;
The literal string in the regex can be replaced by a variable:
$greeting = "World";
print "It matches
" if "Hello World" =~ /$greeting/;
If you're matching against $_, the "$_ =~" part can be omitted:
$_ = "Hello World";
print "It matches
" if /World/;
Finally, the "//" default delimiters for a match can be changed to arbitrary delimiters by putting an 'm' out front:
"Hello World" =~ m!World!; # matches, delimited by '!'
"Hello World" =~ m{World}; # matches, note the matching '{}'
"/usr/bin/perl" =~ m"/perl"; # matches after '/usr/bin',
# '/' becomes an ordinary char
Regexes must match a part of the string exactly in order for the statement to be true:
"Hello World" =~ /world/; # doesn't match, case sensitive
"Hello World" =~ /o W/; # matches, ' ' is an ordinary char
"Hello World" =~ /World /; # doesn't match, no ' ' at end
Perl will always match at the earliest possible point in the string:
"Hello World" =~ /o/; # matches 'o' in 'Hello'
"That hat is red" =~ /hat/; # matches 'hat' in 'That'
Not all characters can be used 'as is' in a match. Some characters, called metacharacters, are reserved for use in regex notation. The
metacharacters are
{}[]()^$.|*+?
A metacharacter can be matched by putting a backslash before it:
"2+2=4" =~ /2+2/; # doesn't match, + is a metacharacter
"2+2=4" =~ /2+2/; # matches, + is treated like an ordinary +
'C:WIN32' =~ /C:\WIN/; # matches
"/usr/bin/perl" =~ //usr/bin/perl/; # matches
In the last regex, the forward slash '/' is also backslashed, because it is used to delimit the regex.
Non-printable ASCII characters are represented by escape sequences. Common examples are " " for a tab, "
" for a newline, and "
" for a
carriage return. Arbitrary bytes are represented by octal escape sequences, e.g., "