A array is the simplest data-structure for storing items in continuously memory
0
votes
2answers
37 views
How to store whole a paragraph as one element of array in bash script
I am using the following code to read data from a file abcd.txt
and try to store in an array parameters, I am able to store 619617 in parameter[0] and update in parameters[1] but in parameters[2] I am ...
3
votes
1answer
128 views
How do I append an item to an array in a pipeline? [duplicate]
This script should simply add a value to an array through a loop and then show all items of an array.
#!/bin/bash
data_file="$1"
down=()
counter=0
cat $data_file | while read line; do \
...
2
votes
4answers
30 views
zsh: map command to array
suppose you have an array a=(foo 'bar baz')
is there a more obvious way to apply a command/function to every array element and save the resulting strings into another array than this:
b=()
for e in ...
4
votes
1answer
132 views
Pass BASH array to diff like file contents
I have two bash arrays, say:
arr1=( 1 2 3 )
arr2=( 1 2 A )
and I want to compare them using diff. How could I pass the arrays as if they were the contents of a file?
I tried a few variations, but ...
-1
votes
2answers
35 views
Loop over columns and store values to associative arrays
I've got a text file containing two columns, like so:
26 0.000342231
27 0.000342231
28 0.000684463
29 0.00136893
30 0.00102669
31 0.00308008
32 0.00308008
33 0.00444901
34 0.00718686
35 0.00718686
36 ...
1
vote
2answers
50 views
Store array to file and load array from file in BASH [closed]
I want to be able to store multiple integer arrays into a txt file when I'm done updating them, and then be able to load these arrays from the txt file into the script that I am using.
The arrays ...
5
votes
1answer
206 views
Single parenthesis in bash variable assignment
So this might seem like a stupid question, but I kinda have OCD about this kind of stuff and I was wondering about single parentheses in bash. I know that they are used for executing commands in ...
3
votes
1answer
224 views
Loop through a multidimensional array in bash 4
I want to define a hash list in bash (version 4.3.30):
4 gateways
each gateway has
an IP
an IP6
a name
...
and I want to walk through this list in a loop and do stuff to each gateway.
I ...
1
vote
1answer
30 views
Handle wildcards matching no file in bash
I am trying to read files from a directory into an array but even when the file doesn't exist, its saved in array. I want to exclude the file name if it doesn't exist.
a=(/tmp/nofileexists) ...
3
votes
4answers
258 views
Processing array values in bash
I am trying to create an array based upon filenames, and get in trouble with whitespaces. This seems common. But - as far as I can see - the quotes are set correctly, I guess it must be the way the ...
4
votes
3answers
69 views
Go from a String to an Array of “words” in Bash
I need to go from a string to an array where each entry is each word on that string. For example, starting with:
VotePedro="Vote for Pedro"
I need the array:
Vote
For
Pedro
Which I should then ...
1
vote
3answers
244 views
Put big data of heterogenous byte offset into arrays by AWK
Assume the data consists of byte offset which is not fixed i.e. the distance of two subsequent file headers varies.
The point of this thread is to go through each size of events separately in arrays. ...
5
votes
2answers
332 views
In a loop over an array, add an element to the array
I have a problem with for loop in bash. For example:
I have an array ("etc" "bin" "var").
And I iterate on this array. But in the loop I would like append some value to the array. E.g.
array=("etc" ...
3
votes
1answer
46 views
bash silently does function return on (re-)declare of global associative read-only array
Obviously cut out of a much more complex script that was more meaningful:
#!/bin/bash
function InitializeConfig(){
declare -r -g -A SHCFG_INIT=( [a]=b )
declare -r -g -A SHCFG_INIT=( [c]=d )
...
1
vote
2answers
78 views
How to add all values in an array
I have been stuck on this for way to long now.
Tried googling and couldn't find what I was looking for.
I simply need to add all the values in an array.(array called packets)
I have gotten to the ...
2
votes
1answer
24 views
Why does this array related code print the index at the end of each line?
I'm having problems working with an array in BASH. I've simplified the problem down to the following code:
#! /bin/bash
A1[0]="user1 user2 user3"
A1[1]="user4 user5 user6"
for each in ${!A1[*]}
...
2
votes
1answer
32 views
How is the order for which keys are stored and reteived determined in awk?
I am just starting to learn awk and was familiarizing myself with associative arrays only to discover that the order in which the keys were retrieved (or stored) didn't make a whole lot of sense. As ...
1
vote
3answers
81 views
Find the complement set of an array?
Following from this question, where I wish to extract 10 random lines from a file, I now wish to also have the remaining 90 lines as a separate file.
Since the document has 100 lines, indexing from 1 ...
1
vote
2answers
44 views
Re-print an array in a certain format?
I wish to take 10 random lines of file, which is 100 lines long. First, I randomly generate 10 integers between 1 and 100 (inclusive) with
ind=$(shuf -i 1-100 -n 10 | sort -n)
Then, I wish to use ...
2
votes
3answers
88 views
How can I prepend and append to each member of an array?
I have an array:
CATEGORIES=(one two three four)
I can prepend to each array member using parameter expansion:
echo ${CATEGORIES[@]/#/foo }
I can append to each array member the same way:
echo ...
2
votes
2answers
66 views
bash + how to define array variable with instance number
Is it possible to define variable that is called for example machine1 as machine$counter ( while counter=1 ) ?
For example, I created the /tmp/config.txt file and set the machine1 as array:
$ more ...
1
vote
1answer
83 views
Combine Bash associative arrays
I am trying make a script that combines arrays on demand. Here is the script:
#! /bin/bash
declare -A code
code=( [H]="h" [E]="e" [L]="l" [P]="p" [M]="m" [E]="e" )
I need to print "help me" - ...
1
vote
2answers
241 views
Dynamically create array in bash with variables as array name
This has been asked several times, but none of the methods work. I would like to dynamically create arrays with array names taken from the variables. So lets start with just one array for now:
...
0
votes
2answers
30 views
How to print arguments from a known element until an unknown element of an array with Bash
I am having a blonde moment.
This is my data from myfile.csv
1429829254,e,SE,StckXchg,HDCU3000623,d,scan,253,47968,94,1420824420,JSSE-213,199,BS,KIT,*OUT*
...
4
votes
3answers
2k views
Is there a way of reading the last element of an array with bash?
If I have an array with 5 elements, for example:
[a][b][c][d][e]
Using echo ${myarray[4]} I can see what it holds.
But what if I didn't know the number of elements in a given array? Is there a way ...
1
vote
1answer
52 views
create an array
I want to learn about arrays and how to assign values to them, so I found this tutorial
While running the following script:
#!/bin/bash
$names=([0]="Bob" [1]="Peter" [20]="$USER" [21]="Big Bad ...
-1
votes
1answer
78 views
Accessing array elements within process substitution bash
I've got a text file which looks like this:
b4238ca2-cb8d-11e4-8731-1681e6b88ec1,https,username,password,ipaddress
b4238f0e-cb8d-11e4-8731-1681e6b88ec1,https,username,password,ipaddress
...
1
vote
1answer
46 views
Setting Qualifiers for Bash Array
I have a bash script that is running an SNMPGET of two values. I want to take the results and put them in an array.
Here is the code:
OUTPUT=`snmpget -v2c -c public -Oqv 192.168.0.33' \
' sysName'\
...
1
vote
2answers
67 views
Splitting the working directory in a bash script
If a do:
IFS="/" read -ra PARTS
And type in a path manually, it creates the array "PARTS" as hoped, however:
IFS="/" read -ra PARTS <<< $(pwd)
creates an array with a single element, ...
3
votes
3answers
203 views
Bash : Native way to get rid of quotation around each array member
I read an array from another script. This array needs to put " " around all array members since some members are empty.
in_file=./data
vector=($(./readdata.sh 0 $in_file))
for index in ${!vector[@]}
...
2
votes
1answer
2k views
how to count the length of an array defined in bash?
I'm new to bash and can't find a good tutorial to answer my question.
array=( item1 item2 item3)
for name in ${array[@]}; do
echo current/total
... some other codes
done
I want to calculate ...
1
vote
2answers
74 views
Read file remove spaces and store in array
I have a file with the following content:
list:
blue,none
red,none
orange,plot
baseball , none
university,none
school,none
desk,plot
monitor,none
earphone,none
I need to read this file, ...
1
vote
3answers
78 views
access elements in string array - stray @ symbol
I have created an array (3 elements), and each element contains a comma delimited string.
The array was created by reading a file line by line - the file contains fields output from a database.
I have ...
2
votes
2answers
200 views
Create array in bash with variables as array name
I'm not sure if this has been answered, I've looked and haven't found anything that looks like what I'm trying to do.
I have a number of shell scripts that are capable of running against a ksh or ...
2
votes
1answer
56 views
Push onto array with find exec
I want to iterate over all the files found by find and add each one to an array. Here's what I have so far:
myarray=()
find . -name '*.php' -exec myarray\+=\({}\) \;
echo "${myarray[@]}"
Instead, ...
4
votes
1answer
493 views
Bash Shell Script Array Length Off By One
The length of an array in my bash shell script appears to be off by one. I have 11 elements in a text file that I am reading in to an array, but my array length seems to be 12.
(( count = 0 ))
while ...
1
vote
1answer
168 views
Processing output from an sqlite db into a ksh array with spaces
I am querying an SQLite3 database like so:
input=$(-separator "," "SELECT field1,field2,field3 FROM table1")
and get this result:
Red,Yellow is a color,Blue
I need to insert this into an array, ...
4
votes
1answer
250 views
How to sort an associative array and retain the keys?
I have an array with filenames as keys and a numerical value as values.
MYARRAY[00001.jpg] = 31
MYARRAY[00002.jpg] = 200
MYARRAY[00003.jpg] = 98
I need to sort them so they are ordered by value.
...
0
votes
2answers
98 views
Multiple variable expansion modifiers in the same expression
Why does the following idiom not work in bash 4.1.0?
if [[ "${FUNCNAME[*]:1/$FUNCNAME/}" != "${FUNCNAME[*]:1}" ]]
Here it is in context...
function isCircularRef_test () {
#
### Seems like ...
-1
votes
2answers
99 views
if else statement
I have a case statement inside some of the if statement, but after doing the case statement inside the if statement, the loop ends. After the case statement, it is supposed to go to the next value on ...
1
vote
1answer
45 views
Whats wrong in creating/printing this array?
To find the average time taken to create certain files, I'm using this minutes array, then would simply use bash arithmetic to find the average. However I'm unable to get the difference except for the ...
2
votes
3answers
321 views
Loop over associative arrays by substring
In the following code, I create some associative arrays in a loop. The consist of two strings, a string identifier and a year. After creation, I want to access the arrays in a loop based on the ...
2
votes
1answer
42 views
CInt Configure Script: Syntax error at left parenthesis
I am trying to install CInt. When running ./configure, I get the following error:
./configure: 23: ./configure: Syntax error: "(" unexpected
Here is the relevant section of configure:
# configure ...
0
votes
1answer
774 views
Bash script: array elements containing space character [duplicate]
I'm getting started with bash scripting. I'm working with array elements that contain space characters. In the code below, the third array element is "Accessory Engine". I tried to set the space ...
1
vote
1answer
165 views
Why does the printf statement in this loop output the array out of sequence?
When I execute the following code, the output of the printf statement appears to show array out of sequence. In the declare statement the Source item is declared before Destination and in the output ...
0
votes
2answers
194 views
Delete last character of last item in a bash array
I have such array:
Array={123},{456}
Now I want to delete the last item 6.
1
vote
1answer
539 views
Compare two Arrays in KSH and output the difference
I am not extremely familiar with KSH (Actually just started using it) and I am having problems with trying to create a script that will essentially compare two arrays that have been stored and then ...
0
votes
1answer
190 views
Insert variable value as element in array
If I have a variable that has a value stored and I want to place that value into an array using the name of the variable, how would I do this?
e.g.:
variable="Hello there"
array[0]=$variable
does ...
1
vote
3answers
74 views
Use a variable as part of name of an array name?
I essentially have a for loop where the variable i that I am iterating with will take on each letter of the alphabet, for example. I want to use each value of i to create an array called "$i"array ...
0
votes
1answer
67 views
For value falls within a range get corresponding value
I am thinking to use awk to search a value from input file in a reference file and get a corresponding value from reference file.
Both reference and input files can be sorted based on $3 and $2 ...
