Programming :: Find A Substring/member In A String/array Using Bash?
Oct 13, 2010
This may be a basic bash array/string operation related question, but I couldn't find any direct answer. So here it goes:I have a lot of data sorted in various directories. All directories need same processing except for a special group of directories. I have a symbolic link of the script in discussion in each directory. I want the script to get the name of the current directory, check if that belongs to special group and do specific operations.So I get the name of the directory
Code:
mm=`basename `pwd``
Now the the group of directories that needs something different to be done, contains these
[code]...
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Oct 14, 2010
I am using gnu bash 3.2I need to split the string into array like
a=this_is_whole_world.file # split [_.]
I need to split this on _ and . some thing like this
a[0]=this
a[1]=is
a[2]=whole
a[3]=world
a[4]=file
preferable using bash regex. if not sed is also ok.
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May 19, 2011
I have the following function that does not iterate through the array I want to be able to do some manipulation on each element in the array[@].it appears the below array has only one item in the array whereas i want the array to have 3 items hence the loop three times printing the message Any ideas why this is not happening ?
function foo() {
name =$1
array=( "$2" )
[code]...
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Mar 5, 2010
for example
010100
this is the string
the substring is 010
i need to search for this substring and i also need to return the next 3 characters i.e 100.
i need to apply this for this string
01010000001001100000100010
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Sep 13, 2010
I want normal substring of a string that actually is a url as follows
SITEURL/main.php?page=122&type=download_file&fileID=9&user Id=user1&org=org1&mainmenu=main1&submenu=sub1
What I want is a substring like below
org1_user1_main1_sub1
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Jun 7, 2011
The code below defines an array of structures in a class. I would like this to be a Static array and then initialize the array in a initialization method. I understand that initialization lists are the way to go but due to the size and complexity of the array I plan on using (the example below is a simple snippet that illustrates the problem) I would like to use the initialization method. However, I cant even get this thing to compile. The error says the reference to the ArrayOfStructs in the initialization routine is undefined.
l_long_Island
P.S. This is the error message
undefined reference to `ClassWithStaticArray::ArrayOfStruts'
class ClassWithStaticArray {
public:
struct IntegerStruct
{
[code]....
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Apr 17, 2011
write such script (bash script). I have some text file with name filename.txt I must check if this file contains string "test-string-first", I must cut from this file string which follows string "keyword-string:" and till first white-space and save it to some variable.
For example. File: PHP Code: PHP Code:
Start 15022011 Eng 12-3-42
SN1232324422 11 test-string-first
SN322211 securities
HH keyword-string:123456321-net mark (11-22)
[Code].....
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Feb 14, 2011
I wanted to find and replace a string from a perl file. I have written a script in bash which runs the following command.
perl -pi -e "s/$findstring/$replacestring/" testfile
where as $findstring = print F_WC_TMP"$line
";
and $replaceString = $line = join ' ', split ' ', $line; print F_WC_TMP"$line
";
But when I am running the above command, i think it is replacing the $findstring with the above mentioned string and hence it contains a $line, it is looking for the variable $line and not finding the exact string. I am confused about how to search for a string that contains $ in it and replace it with another $string.
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Mar 17, 2011
how do I split a string into an array?In this string:"this is a story"how do I split it by the space?
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Mar 21, 2011
I'm trying to split a string, to later iterate using a for loop like
Code:
for (( i=0; i<5; i++))
But, my script returns an array with the size 1.
Here's the script:
Code:
aver=$(grep "avg" A.txt | awk '{ print $2 }');
a=$(echo $aver | tr " " "
");
[Code]....
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Oct 29, 2009
I've got a problem...
a[0] = 22
echo $[a[0]]
echoes 22 - that works fine
[code]...
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Jul 16, 2010
I'm trying to use ${VAR:0:4} substring extraction described here: tldp.org/LDP/abs/html/string-manipulation.html and it works perfectly if i issue a command in bash. But when i put it in a script file and run it, bash gives me "bad substitution" error. Does anyone know how to fix it?
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May 9, 2010
I've searched around and can't find out how to convert a string ( like "12345" ) into an int array ( x[ 5 ] = { 1, 2, 3, 4, 5 } ; ).
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Mar 7, 2011
Can you create a dynamic string array and using calloc(),realloc()?
Like:
Code:
string* x;
x = (string) calloc(x,sizeof(string));
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Feb 4, 2010
I have a string variable
var1=<default>111</default>
I want the value between default tags 111 in this case.
I treid to use ${var1:10:3}
But the execution gived "bad substitution' error. If the tags are removed and substring is fetched it works fine. Is there any other was to get substring in a string with tags.
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Jan 12, 2009
I need to call a function that takes a string array as argument, declared like this:Code:int someFunction(/* some parameters... */, const char* s[]);I'd like to know how to allocate memory for the string array. I know a string is an array of chars and an array is a pointer to the first element, then a string array should simply be a two dimensional char array. But is it a single memory block where all strings are stored consecutively?? Or is it a base vector where each element is a pointer to a separate memory block that contains a single string?More specifically: should I malloc() a single memory block large enough for all the strings? or should I allocate separate blocks for each string plus an extra one for the base vector?
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Aug 18, 2010
i have problem in java. how to convert string array to character. e.g string a[]={"ab","abc","abd","ag"}; what will be the character array ?
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Jan 24, 2011
How can I list string indexes from an array in ksh ?
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May 13, 2009
Please look at the comments
Code:
/*
* TEST CASE TO CHECK DIFFERENCES BETWEEN STRING AS
[code]...
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Oct 11, 2010
I want to put a string, such as the one found in the image, into an array that will later be chopped into individual words and put into another array of individual words found in the initial string. (or, perhaps, I would be able to do that initially, but for now, that is the goal)My question is, how can I do that without using quotation marks?
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Jun 4, 2010
How can i split a string like this,
Code:
This is my first line.
This is my second line.
This is my third line.
into,
Code:
"This is my first line.", "This is my second line.", "This is my third line."
in C++.
i.e. split the code at every new line
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Apr 8, 2011
I have a sed match that matches for certain string of a regex expression:
Code:
tname=$(echo "$contents" | sed -n 'some pattern')
How do I match for multiple strings in the $contents and return them as an array? for example
Code:
contents="this is a text, just to match patterns, here is another text to be matched"
the sed func would be able to recognize both "text"s, but only one is outputted?
Possible to put it in an array? so ${bar[0]} gives one and ${bar[1]} gives another
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Jun 20, 2010
I 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=$1
[code]....
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Mar 29, 2011
Here is the issue. I am reading in a outside text file and putting in the string on that line into a char array that is already allocated.
Code:
int main(int argc, char *argv[])
{
[code]....
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Apr 8, 2010
Is there a way for me to mount a raid array member directly without using any of the raid tools? For instance, I have a raid 1 array that contains /dev/sda1 and /dev/sdb1. How can I mount /dev/sda1 or /dev/sdb1 directly? Doing mount /dev/sda1 <mnt point> does not work. If I try specifying the filesystem type with -t this doesn't work either.
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Nov 28, 2010
Is it possible to have an array in Bash that can hold more than one value per item?
For example I would like an array like this:
Entry 1: apple, green
Entry 2: banana, yellow
And be able to call the fruit names and their colour in a list. Something like:
for fruit in "${array[@]}"
do
echo a $fruit is $colour
done
If that is possible, is there a limit to values per item? For example some entries in an array could be:
Entry 1: apple, green, round, pips, tree
Entry 2: banana, yellow, long, skin, tree
And I would like to pick out the values such as #3 being "round" and "long".
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May 13, 2010
I have this code:
Code:
original_content=${content[@]};
echo ${#content[@]} # is 23
echo ${#original_content[@]} # is 1
I'd expect original_content should be copy of content. How to copy array?
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Mar 29, 2011
I'm trying my hand at arrays in bash for a backup script. Now I not sure if this is the correct thing to do and just look at website and amended but does'nt work. Could someone tell me where I'm going wrong
LOG_DIR="/home/ops/Desktop/temp"
array[0]=3
array[1]=/home/ops/Desktop/dir1
[code]...
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Sep 24, 2010
Code:
test=(1 2 3 4 5)
for car in ${test[@]}
do
echo "Element : $car"
[code]....
if variable $car equals 1, new element is added "6" to an array. But i don't know why when i am printing all elements of this array (echo "Element : $car") this element ("6") is not mentioned, but if i make a command which check an amount of contained elements by array it will be 6 elements.
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Jan 18, 2011
I have a program that loops over each word in a sentence. I need to append a constant to the beginning and end of each word. It works up until the last word on the line.
Code:
Output:
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