Hi,
having two csv files, both sorted, by key (column1), f1 containing duplicate keys and f2 containing no duplicate keys, how can I obtain all rows from f1 with the keys listed in file2? Example:
f1 is:
k1,gsj01fd
k2,vi982cj
k2,1fjk01e
k3,81kjfds
k4,sd9dasi
f2 is:
k2
k3
and I... (3 Replies)
Hi guyz I have been using this script to find similar keys in 2 files and merge the keys along with their values. Therefore it prints similar keys by leaving dissimilar. Any one knows how to print only Dissimilar leaving Similar.
Help would be appreciated.
The script I'm using for similar... (4 Replies)
HI
The input 1st column has specific keys like 1 with value a,b and c. 2 with b,b,d and 3 with a,a a.
when ever c appears as one of the values the result will be key ........ c (You can see in the out put as 1 w...... 6.... c) and same follows for d.
Thanx:)
I'm learning awk scripting. If... (3 Replies)
Hi Guyz
The 1st column of the input file has repeated keys like x,y and z.
The ist task is if the 1st column has unique key (say x) and then need to consider 4th column, if it is + symbol then subtract 2nd column value with 3rd column value (we will get 2(10-8)) or if it is - symbol subtract 3rd... (3 Replies)
key pair is 1st and 6th column ex:a20 : p10 or a20 : p11
For every key pair if the vlaue(4th column) is the same then delete all the lines who has keypair and the value
ex: a20 : p10 has value 1 only then delete those but a20 : p11 has different values 1,2 and 3 and keep those.
input
a20 ... (8 Replies)
I am trying to insert csv data into a table
mysql> load data infile '/var/www/PLU.csv' into table Food2 fields terminated by ',' enclosed by '"' lines terminated by '\n' ;
ERROR 1062 (23000): Duplicate entry '4014' for key 'PRIMARY'
... (4 Replies)
Hello experts, I want to join a file with files whosE names are mentioned in one of the columns of the same file.
File 1
t1,a,b,file number 1
t1,a,c,file number 1
t2,c,d,file number 2
t2,c,e,file number 2
t2,c,f,file number 2
t2,c,g,file number 2
t3,e,f,file number 3
file number 1... (3 Replies)
Dear folks
I have a map file of around 54K lines and some of the values in the second column have the same value and I want to find them and delete all of the same values. I looked over duplicate commands but my case is not to keep one of the duplicate values. I want to remove all of the same... (4 Replies)
Hello
I have a file like this:
> cat examplefile
ghi|NN603762|eee
mno|NN607265|ttt
pqr|NN613879|yyy
stu|NN615002|uuu
jkl|NN607265|rrr
vwx|NN615002|iii
yzA|NN618555|ooo
def|NN190486|www
BCD|NN628717|ppp
abc|NN190486|qqq
EFG|NN628717|aaa
HIJ|NN628717|sss
>
I can sort the file by... (5 Replies)
Hello,
I am writing a script which expects as its input a hash with student names as the keys and marks as the values. The script then returns array of average marks for student scored 60-70, 70-80, and over 90.
Output expected
50-70 1
70-90 3
over 90 0
The test script so far... (4 Replies)
Discussion started by: nans
4 Replies
LEARN ABOUT DEBIAN
devel::refcount
Devel::Refcount(3pm) User Contributed Perl Documentation Devel::Refcount(3pm)NAME
"Devel::Refcount" - obtain the REFCNT value of a referent
SYNOPSIS
use Devel::Refcount qw( refcount );
my $anon = [];
print "Anon ARRAY $anon has " . refcount($anon) . " reference
";
my $otherref = $anon;
print "Anon ARRAY $anon now has " . refcount($anon) . " references
";
DESCRIPTION
This module provides a single function which obtains the reference count of the object being pointed to by the passed reference value.
FUNCTIONS
$count = refcount($ref)
Returns the reference count of the object being pointed to by $ref.
COMPARISON WITH SvREFCNT
This function differs from "Devel::Peek::SvREFCNT" in that SvREFCNT() gives the reference count of the SV object itself that it is passed,
whereas refcount() gives the count of the object being pointed to. This allows it to give the count of any referent (i.e. ARRAY, HASH,
CODE, GLOB and Regexp types) as well.
Consider the following example program:
use Devel::Peek qw( SvREFCNT );
use Devel::Refcount qw( refcount );
sub printcount
{
my $name = shift;
printf "%30s has SvREFCNT=%d, refcount=%d
",
$name, SvREFCNT($_[0]), refcount($_[0]);
}
my $var = [];
printcount 'Initially, $var', $var;
my $othervar = $var;
printcount 'Before CODE ref, $var', $var;
printcount '$othervar', $othervar;
my $code = sub { undef $var };
printcount 'After CODE ref, $var', $var;
printcount '$othervar', $othervar;
This produces the output
Initially, $var has SvREFCNT=1, refcount=1
Before CODE ref, $var has SvREFCNT=1, refcount=2
$othervar has SvREFCNT=1, refcount=2
After CODE ref, $var has SvREFCNT=2, refcount=2
$othervar has SvREFCNT=1, refcount=2
Here, we see that SvREFCNT() counts the number of references to the SV object passed in as the scalar value - the $var or $othervar
respectively, whereas refcount() counts the number of reference values that point to the referent object - the anonymous ARRAY in this
case.
Before the CODE reference is constructed, both $var and $othervar have SvREFCNT() of 1, as they exist only in the current lexical pad. The
anonymous ARRAY has a refcount() of 2, because both $var and $othervar store a reference to it.
After the CODE reference is constructed, the $var variable now has an SvREFCNT() of 2, because it also appears in the lexical pad for the
new anonymous CODE block.
PURE-PERL FALLBACK
An XS implementation of this function is provided, and is used by default. If the XS library cannot be loaded, a fallback implementation in
pure perl using the "B" module is used instead. This will behave identically, but is much slower.
Rate pp xs
pp 225985/s -- -66%
xs 669570/s 196% --
SEE ALSO
o Test::Refcount - assert reference counts on objects
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2011-11-15 Devel::Refcount(3pm)