Programming :: Create A Small Array Of 3x3 Arrays?
Jul 12, 2009I'm trying to figure how to create an small array of 3x3 arrays such I can do
Code:
SUM1(i) = SUM1(i) + SUM2
where i goes from 1 to 8 and SUM2 is a 3x3 array.
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Programming :: Arrays In The C Programming Language Are Pointers To The First Element Of The Array?
Mar 27, 2010I wonder why arrays in the C programming language are pointers to the first element of the array, not the first element of the array itself?
View 14 Replies View RelatedOpenSUSE :: Udev Rules: Hide Arrays And Array Members From Nautilus?
Aug 18, 2010In the not so distant past, I was able to hide arrays/encrypted arrays from nautilus with udev rules as follows:
Code:
## HIDE Encrypted "dm" partitions from nautilus
SUBSYSTEM=="block", KERNEL=="dm-*", ENV{ID_FS_USAGE}=="crypto", ENV{DKD_PRESENTATION_HIDE}="1"
[Code].....
This worked in OpenSUSE 11.2; it does not work in either FC13 or OS11.3
Programming :: Create An Array That Will Allow To Print A List After Selection?
Oct 18, 2010I am trying to create an array that will allow me to print a list after selection such as:
1) Location A
2) Location B
3) Location C
Would you like to print selected locations? Print I have no idea how to approach this problem and don't know whether Perl, Bash or shell script would be the most useful in this particular situation.
Programming :: Unable To Dynamically Create An Array Of Params For Execv In C
Jan 6, 2011I haven't programmed in C for a while, so I am trying to remember certain aspects of syntax. I have a program that will fork and exec other programs. Those programs will be specified on the command line as follows:
./main "prog1 arg arg ..." "prog2 arg arg ..."
Here is the main snippet:
int countChar(char* s, char c)
{ int cnt = 0;
int len = strlen(s);
for(int i = 0; i < len; i++)
[code]....
The highlighted line is the problem. I get this error:
dualstarter.cpp:58: error: initializer fails to determine size of 'params'.
Right now I am thinking of creating an array with the specified size and simply copying the required string into it, but it just seems like there is an easier way.
Slackware :: How To Create Raid Arrays With Mkfs.btrfs
Jun 21, 2011what do I have:2x 150GB drives (sda) on a raid card (raid 1)for the OS (slack 13.37)2x 2TB drives (sdb) on that same raid card (raid 1, too)2x 1.5TB drives (sdc,sdd) directly attached to MoBo2x 750GB drives (sde,sdf) attached to MoBo too.if i got about it the normal way, i'd create softRAID 1 out of the the 1.5TB and the 750GB drives and LVM all the data arrays (2TB+1.5TB+750GB) to get a unified disk.If I use btrfs will I be able to do the same? mean I have read how to create raid arrays with mkfs.btrfs and that some lvm capability is incorporated in the filesystem. but will it understand what I want it to do, if i just say
Code:
mkfs.btrfs /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1 /dev/sdf1
probably not, eh?
Programming :: C Realloc Resize Array / Delete And Add Information Into The Array?
Mar 6, 2011I am trying to dynamically delete and add information into the array "blah"
Code:
int blahsize = 1;
char** blah = (char**) calloc(blahsize+1,sizeof(char*));
Adding information:
Code:
blah[1]=stuff1;
blah[2]=stuff2;
code....
Programming :: Convert Short Array To Char Array?
Jun 7, 2010I have trouble converting a short array to a char array
Code:
short pShort[4] = { 0x41, 0x42, 0x43, 0x44 };
How to convert this to a char array?
Programming :: Adding Two Arrays?
Mar 1, 2010I have a problem on a program,the problem take a very long time when i try to add two big arrays element by elementI know that matlab make adding vectors more faster than adding element by element but I don't know how!!!do any body knew how matlab make vectors operations more faster than element by element???I want to make my calculation more faster because the program is very big
View 8 Replies View RelatedProgramming :: Character Arrays In C?
Nov 3, 2010I was reading Kernighan Ritchie book chapter 4 which deals with character pointers.I am not able to understand following different type of declarations
Code:
char aname[][15] = { "Illegal month", "Jan", "Feb", "Mar" };
char amessage[] = "now is the time";
[code]...
Programming :: Using Of Arrays In Loops?
Sep 3, 2009need to process files within multiple directories and transfer these to a remote server. What I had in mind was to use arrays for this; code pasted below (explains it better):
Code:
#set the arrays
array_A=( fileA* pathtodestA hostA passwordA )
[code]...
Programming :: Converting A PHP Array Into An HTML Array?
Aug 9, 2009I'm writing a PHP program. I've encountered a problem; in the following code I try to pass $_POST['delete'] which is an array as the value of a hidden input to some form, but it doesn't do so.there's something wrong with converting PHP array into HTML array. I'm sure that $_POST['delete'] is not null and is a real array.
echo '<input type="hidden" name="delete[]" value="'.$_POST['delete'].'" />';
Programming :: Can Diff Take Arrays As Input
Jun 19, 2010Does diff not like arrays? How do achieve the following?
Code:
stuart@stuart:~/music transfer$ diff file1.txt file2.txt
1c1
< bonkers_in_phoenix.mp3
[code]....
Programming :: Initializing Arrays In The Bash?
Mar 12, 2009I'm making script for automated compiling of one program which would output builds optimized for many architectures. For clearancy, I do each build in it's own catalogue and list of builds with their respective catalogues would be stored as array. I'm using this guide as reference. It describes making array as naming a variable with additional brackets denoting it's position in array.
In my code, it looks exactly like this:
Code:
mtune[1]="build/mtune/athlon"
mtune[2]="build/mtune/athlon-4"
mtune[3]="build/mtune/athlon-mp"
[code]....
But upon invoking $mtune or any $mtune[x] variable, output is blank, like the variable(s) were never initialized. What am I doing wrong?
Programming :: Printing 2 Arrays To 2 Columns?
Jun 16, 2010I have a Perl script that has two arrays - they are related. I would like to print out the contents into two columns next to each other.
#!/usr/bin/perl
open(PINGFILE, </home/casper/pingdata.txt") or die " can not open file ";
my @totalfile=<PINGFILE>;
foreach $string(@totalfile) {
if ($string =~ m/(^1sping)(?=.*max))/) {
push(usecstring,"$string");
[Code]...
Programming :: Structures And String Arrays, C?
Apr 18, 2011I am working on a project that needs to use structures and I'm pretty sure string arrays. First I declare my structures and they must be exactly like this.
typedef struct
{
int hour;
[code]....
Programming :: Read Text File Using Arrays In C++?
Oct 19, 2010a project using bluetooth to send data byte by byte to external devices buti'm not familiar using arrays to read file from another location before sending the data.If you could,do correct my codes.Here's my code,
void loop(){
char Msg[]={"Hello"};
char *start;
[code]...
Programming :: Get Number Of Elements In A Hash Of Arrays?
Dec 10, 2008I have something like this:
$arr_hash{'produce'}{'veggies'}[0] = Broccoli
$arr_hash{'produce'}{'veggies'}[1] = Cauliflower
$arr_hash{'produce'}{'veggies'}[2] = Carrots
[code]...
Programming :: Perl - Pointers To Arrays From Hashes?
Feb 18, 2010I'm trying to figure out how to code for this specific type of instance - I want to use a hash and have the key be a reference to an array, and not use the key in the standard way of it being a scalar. Basically, I have a large output that I need to process line by line, and rather have access to it as an array than a big block in a scalar. For the big block hash as a scalar I would do -
Code:
foreach $CONTROLLER (<CONTROLLER_LIST>) {
$ALL_DISKS{$CONTROLLER} = `ssh -n <commands>`;
}
Now I know I could take the scalar and split it to another array after the fact like -
Code:
@TEMP_HOLD = split (/s+/,$ALL_DISKS{$CONTROLLER});
How would I code it that I would have access to the key information as an array and not a scalar? I know it needs to be a pointer and we're going to have -> in there somewhere, but not sure how to approach it. Some of the documentaiton I've been reading about referencing I've found a little confusing so far, and trying to figure out how to use them in context of what I'm working on.
Programming :: If Test Validation - Using Char Arrays
Jun 9, 2010I'm writing a code to get the index of the last occurrence of a given substring in a string.
Code:
int StringHandler::lastIndexOf(string src, const string s) {
unsigned int lastIndex = string::npos;
if (src.find(s, 0) == string::npos) {
return -1; } else {
bool isLast = false; unsigned int i = 0; do {
lastIndex = src.find(s, i);
if (lastIndex != string::npos) { i = lastIndex + 1;
if (i == src.size()) { isLast = true;
} } else { isLast = true;
} } while (!isLast);
} return lastIndex;
}
My problem is: execution steps into an if with a false condition! Check the values of i and src.size() at the right panel. How could be possible for the program to run the highlighted statement? The if condition above is false! [URL]. I could use char arrays, for example, but this kind of false validation has happened to me more than once, I'm using G++ 4.5 with these flags: -O0 -g -Wall -c
Programming :: PHP - Sorting Multi Dimensional Arrays By One Column
Mar 17, 2009I just started programming in PHP so I haven't figured out how to do this yet, but I have a multi-dimensional array that I need to sort by one column. That's fine...but I need the sort to ignore case! Right now I have it sorted by 'name' (the other column is 'uid').
The problem is that by the default the sort is case-sensitive so the array looks like this:
Code:
Apple 4015
Banana 4011
Cherry 4045
avocado 4046
I want to be able to sort the the 'name' column in a case-insensitive manner so that the array actually looks like:
Code:
Apple 4015
avocado 4046
Banana 4011
Cherry 4045
How to accomplish this? Just FYI I'm not actually sorting the PLUs for fruits...but it was a simple example. I'm actually doing this for a Facebook application.
Programming :: Bash: Combine Arrays & Delete Duplicates?
May 23, 2011I would like to combine two arrays and delete duplicates that might occur. I tried to solve it like this:
Code:
combined=( "${results1[@]}" "${results2[@]}" )
printf "${combined[@]}" | sort -n | uniq
Example:
result1 (4 elements):
[Code]....
In my code printf seems to have a problem with elements that have the same letters but a space inbetween. For instance "new foo", "newfoo" are the same for printf
Programming :: Bash Scripting Arrays And Indirect Referencing
Feb 23, 2010I've got a situation. I'm having GNU bash version 3.00.16(1) on Solaris 10. I need to declare an array say arr1 which will be populated by an output of a command.
declare -a arr1
arr1=( $(/some/command) )
Supposing it will eventually (after executing the command) have element values as -
arr1[0]=1234
arr1[1]=5678
arr1[2]=7890
Now, I need to declare another set of arrays, one for each of the element values above - e.g.
declare -a arr1_1234
declare -a arr1_5678
declare -a arr1_7890
And I also need to populate elements of each of above 3 arrays with output of another command in a loop. So, these arrays will hold values something like -
arr1_1234[0]="abc"
arr1_1234[1]="def"
arr1_1234[2]="ghi"
arr1_5678[0]="jkl"
arr1_5678[1]="mno"
arr1_5678[2]="pqr"
arr1_7890[0]="tuv"
arr1_7890[1]="xyz"
arr1_7890[2]="aab"
I'm able to declare and populate arr1[*]. My question is how do I declare, populate and print the subsequent arrays and their elements?I am feeling rather thick to get this working.
Programming :: Multi Dimensional Arrays In C Of Variable Size
Apr 15, 2010I am curious if there is a way to describe and use variable sized multi-dimensional arrays in C using pointers. I mean, for 1-dimensional array e.g. I can use the following piece of code:
...
int i , N;
int *array;
scanf("%d", &N);
array = (int*) malloc(N*sizeof(int));
for (i=0; i<N; ++i) array[i] = i; // Assigning values to the array
for (i=0; i<N; ++i) printf("%d ", array[i]); // Printing the assigned values
free (array);
...
But what about the two dimensional array[N][M] ? I guess I have to use a double pointer e.g: int **array. But how exactly? Note that I use C90 and not C99.
Programming :: Getting An Undefined Offset For The Associative Arrays [28-46] In Format
Dec 8, 2010i'm getting an undefined offset for the associative arrays [28-46] in this format.
[Code]....
i have read that i can prevent the notices by doing the following, but it's not working for me
PHP Code:
[Code]....
Programming :: Arrays In Awk - Take Some Data From A File - Ssh Log - And Print It To A Html Table
Feb 7, 2011I have a problem with arrays in awk. What i want is to take some data from a file (ssh log) and print it to a html table. I have managed to print some stuff (user logged in and how many times they have logged in) What i want more is to take all the ip that each user logged in from and print it in a row next to the username and times (in the code i typed blabbla where i want the ip to be shown. How do you think i should approch that, multidimensional arrys maybe?
Code:
Programming :: Filling 2D Array With 1D Array In C?
May 26, 2010(I am using vector() and matrix() functions from "Numerical recipes in C".)There are 100 numbers to be stored in 2D array of 10 rows and 10 columns.100 numbers are stored in a 1D array.I get "segmentation fault" at the line indicated in the segment of my code below:
Code:
:
:
#define size 100
#define nl 1
[code]....
Programming :: Bash Array Add Function Example Using Indirect Array Reference As Function Argument?
Jun 20, 2010I looked on the net for such function or example and didin't find anything, thus after having made one i guess it would be legitimate to drop it to see what others thinks of it.
#!/bin/bash
addelementtoarray()
{
local arrayname=$1
[code]....
Fedora :: How To Run Sound Recorder To Create Small Audio File
Dec 21, 2010I want to run SoundRecorder (or audacity). I just want to create a small audio file. I can't seem to get the mike to record. I start the record function and expect to see changes in the "Level" indicator that correspond to sounds that I utter.
-Search of google shows lots on solutions for non fedora 14
-FAQ - no hits
-Musicians Guide is 248 pages long and I did not see a solution for this simple case.
I have installed jack-audio, audacity and dependencies.
Debian Configuration :: Pamthreshold To Create Small Greyscale Image Of A Text Document
Nov 23, 2010I have an old scanner script that uses pamthreshold to create a small greyscale image of a text document. This program does not seem to be available in debian. Can anyone tell me how I can install it, or if there are any better alternatives available?
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