No surprise it doesn't work for you, as it by no means fits the problem. Try
As the order in which the array elements are retrieved is unspecified, you may need to sort the output. And, you may want to define a different output field separator.
I'm implementing a shell in C that supports piping, output redirection, and background processing, and a few other commands. I was wondering how I'd go about implementing the output redirection. So, I'd open a file and I'd fork and execute the command. But how would I get stdout into the file? Any... (10 Replies)
hello all,
i hv attached herewith my program to implement a simple interactive shell in C. no matter hw hard I try, I keep getting some errors. i need help - urgently !!
proj1test7.c: In function `parseCommand':
proj1test7.c:102: warning: assignment makes pointer from integer without a cast... (2 Replies)
Hi,
I am implementing a shell in C, with the following problem...
Suppose the shell is invoked from the command line as
>> myshell < test.in > test.out 2>&1
I have to execute the commands in test.in and redirect them to test.out
How does one detect in the main function that the shell... (1 Reply)
1. The problem statement, all variables and given/known data:
need to implement mkdir, chdir, mv, pwd
given a shell.cpp directory.cpp and some other files
this shell missing these commands, and i need to implement them inside the shell
2. Relevant commands, code, scripts,... (0 Replies)
HI
I want to implement a control mechanism using Shell scripts .The intention is to have controlled number of jobs running in parallel
External process will kickstart 40 jobs in parallel .All the 40 jobs will call the same generic script with different parameter values .But at a... (4 Replies)
Hello,
i'm trying to implement the times() function and i'm programming in C.
I'm using the "struct tms" structure which consists of the fields:
The tms_utime structure member is the CPU time charged for the execution of user instructions of the calling process.
The tms_stime structure... (1 Reply)
I have this code where I have declared a struct with some functions. Trying to write the function implementation outside the struct declaration and do not know how to proceed.
#ifndef ParseEl_hh
#define ParseEl_hh
#include <iostream>
#include <fstream>
#include "DynBaseObj.hh"... (7 Replies)
Hey Guys,
My problem:
I have a script that will be querying the database every minute to see if it gets a response, the response its querying for is "UP" in a table i made called dbup in the database.
Now, I am trying to add the component to implement a timeout if the script does not get a... (2 Replies)
Hello Experts,
Is it possible to implement linked list in shell scripting? is yes then how can we do it? Any working example is highly appreciated.
Thanks in advance. (4 Replies)
I am using DB2 v9 and trying to get country values in comma seperated format using below query
SELECT distinct LISTAGG(COUNTRIES, ',') WITHIN GROUP(ORDER BY EMPLOYEE)
FROM LOCATION ;
Output Achieved
MEXICO,UNITED STATES,INDIA,JAPAN,UNITED KINGDOM,MEXICO,UNITED STATES
The table... (4 Replies)
Discussion started by: Perlbaby
4 Replies
LEARN ABOUT DEBIAN
pdl::char
Char(3pm) User Contributed Perl Documentation Char(3pm)NAME
PDL::Char -- PDL subclass which allows reading and writing of fixed-length character strings as byte PDLs
SYNOPSIS
use PDL;
use PDL::Char;
my $pchar = PDL::Char->new( [['abc', 'def', 'ghi'],['jkl', 'mno', 'pqr']] );
$pchar->setstr(1,0,'foo');
print $pchar; # 'string' bound to "", perl stringify function
# Prints:
# [
# ['abc' 'foo' 'ghi']
# ['jkl' 'mno' 'pqr']
# ]
print $pchar->atstr(2,0);
# Prints:
# ghi
DESCRIPTION
This subclass of PDL allows one to manipulate PDLs of 'byte' type as if they were made of fixed length strings, not just numbers.
This type of behavior is useful when you want to work with charactar grids. The indexing is done on a string level and not a character
level for the 'setstr' and 'atstr' commands.
This module is in particular useful for writing NetCDF files that include character data using the PDL::NetCDF module.
FUNCTIONS
new
Function to create a byte PDL from a string, list of strings, list of list of strings, etc.
# create a new PDL::Char from a perl array of strings
$strpdl = PDL::Char->new( ['abc', 'def', 'ghij'] );
# Convert a PDL of type 'byte' to a PDL::Char
$strpdl1 = PDL::Char->new (sequence (byte, 4, 5)+99);
$pdlchar3d = PDL::Char->new([['abc','def','ghi'],['jkl', 'mno', 'pqr']]);
string
Function to print a character PDL (created by 'char') in a pretty format.
$char = PDL::Char->new( [['abc', 'def', 'ghi'], ['jkl', 'mno', 'pqr']] );
print $char; # 'string' bound to "", perl stringify function
# Prints:
# [
# ['abc' 'def' 'ghi']
# ['jkl' 'mno' 'pqr']
# ]
# 'string' is overloaded to the "" operator, so:
# print $char;
# should have the same effect.
setstr
Function to set one string value in a character PDL. The input position is the position of the string, not a character in the string. The
first dimension is assumed to be the length of the string.
The input string will be null-padded if the string is shorter than the first dimension of the PDL. It will be truncated if it is longer.
$char = PDL::Char->new( [['abc', 'def', 'ghi'], ['jkl', 'mno', 'pqr']] );
$char->setstr(0,1, 'foobar');
print $char; # 'string' bound to "", perl stringify function
# Prints:
# [
# ['abc' 'def' 'ghi']
# ['foo' 'mno' 'pqr']
# ]
$char->setstr(2,1, 'f');
print $char; # 'string' bound to "", perl stringify function
# Prints:
# [
# ['abc' 'def' 'ghi']
# ['foo' 'mno' 'f'] -> note that this 'f' is stored "f "
# ]
atstr
Function to fetch one string value from a PDL::Char type PDL, given a position within the PDL. The input position of the string, not a
character in the string. The length of the input string is the implied first dimension.
$char = PDL::Char->new( [['abc', 'def', 'ghi'], ['jkl', 'mno', 'pqr']] );
print $char->atstr(0,1);
# Prints:
# jkl
perl v5.14.2 2011-03-30 Char(3pm)