Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Write a script that allows the user to print the first n lines or the last n lines of every file in the directory specified by the argument. e.g. lshead -head 2 Documents will print the first two lines of every file in the documents directory.
2. Relevant commands, code, scripts, algorithms:
Head command is used in this command as well as the tail command.
3. The attempts at a solution (include all code and scripts):
I have run it and it comes up with this error:
head: Documents: invalid number of lines
I don't understand why it isn't working, I have even consulted friends on this and even they can't understand why it isn't working.
4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):
University of Huddersfield, Huddersfield, United Kingdom, Dr Gary Allen, CFT2112
Note: Without school/professor/course information, you will be banned if you post here! You must complete the entire template (not just parts of it).
Hi All,
How can the head command be used to extract only a particular line.
By default head -n filename displays the first n lines. I want only the nth line.
I couldn't get it from forum search.
Thanks,
Sumesh (6 Replies)
Hi friends,I am new to unix and this is really a dummy question.but please help me out.
How to simulate head command without using head command???
also tail command too,also more command.
it is given as a homework to do....please tell me how to do (2 Replies)
Hi, I have the following problem. I have files with one column of data (let's say file1.dat, file2.dat...file6.dat), and I would like to record the first value of the column of each file into another file (let's name it fileall.dat), which would have the the six values, one in each column. I use to... (4 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
I've been stuck on this problem for 2 days now
What command would you enter to list the first lines of all text... (11 Replies)
Hi,
I need some advise on whether there is a better way of doing what I am currently planning to do. Perhaps I should be using arrays instead of re-directing output to files?
I need to use a tool/program named ADRCI provided by Oracle to remove trace files that it generates. Honestly it is... (1 Reply)
the following unix command gives me the number of records avaiable in my application
/navs/sys/appl/bin/record list
This gives number of rows and colums. I want to generate one text file everyday at 6:10 AM using cron
So I added following entery into crontable
#Generate record file at... (6 Replies)
Hi
1st problem
--------------
i have this sed command in my unix script which replaces new line and carriage return in a line with the string "
"
the script works fine in Linux 3.0.101-0.5, but not in AIX 1 7 , the "s/\r/\
/g" replacement, replaces
all the character "r" in the file.... (3 Replies)
we have a file as below
AREA,COUNTRY,RANK
A,MX,1
A,MX,2
A,MX,5
A,MX,8
A,IN,7
A,IN,5
A,IN,21
B,CN,6
B,CN,2
B,CN,8
B,CN,0
we need the TOP 2 RANK records for the combination of Area, Country as below. i know head -2, which gives top 2 records from file but not sure it lists based on... (7 Replies)
Discussion started by: JSKOBS
7 Replies
LEARN ABOUT DEBIAN
std::hash
std::hash< _Tp >(3cxx) std::hash< _Tp >(3cxx)
NAME
std::hash< _Tp > -
SYNOPSIS
Inherits std::__hash_base< _Result, _Arg >.
Public Types
typedef _Arg argument_type
typedef _Result result_type
Public Member Functions
size_t operator() (_Tp __val) const
template<> size_t operator() (bool __val) const
template<> size_t operator() (char __val) const
template<> size_t operator() (signed char __val) const
template<> size_t operator() (unsigned char __val) const
template<> size_t operator() (wchar_t __val) const
template<> size_t operator() (char16_t __val) const
template<> size_t operator() (char32_t __val) const
template<> size_t operator() (short __val) const
template<> size_t operator() (int __val) const
template<> size_t operator() (long __val) const
template<> size_t operator() (long long __val) const
template<> size_t operator() (unsigned short __val) const
template<> size_t operator() (unsigned int __val) const
template<> size_t operator() (unsigned long __val) const
template<> size_t operator() (unsigned long long __val) const
template<> size_t operator() (float __val) const
template<> size_t operator() (double __val) const
template<> size_t operator() (long double __val) const
Detailed Description
template<typename _Tp>struct std::hash< _Tp >
Primary class template hash.
Definition at line 58 of file functional_hash.h.
Author
Generated automatically by Doxygen for libstdc++ from the source code.
libstdc++ Tue Nov 27 2012 std::hash< _Tp >(3cxx)