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How can I read a whole file into a string variable
I have lots of small files, I don't want to read them line by line.
5 Answers
5
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How to process each line received as a result of grep command
... store the output in a variable, but directly iterate over it with a while/read loop.
Something like:
grep xyz abc.txt | while read -r line ; do
echo "Processing $line"
# your code goes here
done
There are variations on this scheme depending on exactly what you're after.
If you need to ...
Passing arguments to an interactive program non-interactively
I have a bash script that employs the read command to read arguments to commands interactively, for example yes/no options. Is there a way to call this script in a non-interactive script passing default option values as arguments?
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Why is it impossible to override a getter-only property and add a setter? [closed]
...cause the writer of Baseclass has explicitly declared that Bar has to be a read-only property. It doesn't make sense for derivations to break this contract and make it read-write.
I'm with Microsoft on this one.
Let's say I'm a new programmer who has been told to code against the Baseclass derivati...
How to read json file into java with simple JSON library
I want to read this JSON file with java using json simple library.
13 Answers
13
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Bash: infinite sleep (infinite blocking)
...p. (On my Ubuntu64 16.10 this adds several 10 syscalls per second on an already busy system.)
The question was for a blocking command
Unfortunately, there is no such thing ..
Read: I do not know any way to archive this with the shell directly.
Everything (even sleep infinity) can be interrupted...
How to export and import a .sql file from command line with options? [duplicate]
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If you're already running the SQL shell, you can use the source command to import data:
use databasename;
source data.sql;
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Linux command (like cat) to read a specified quantity of characters
...get ranges of bytes. For example, to get the second 100 bytes from a file, read the first 200 with head and use tail to get the last 100:
head -c 200 file | tail -c 100
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Count how many records are in a CSV Python?
I'm using python (Django Framework) to read a CSV file. I pull just 2 lines out of this CSV as you can see. What I have been trying to do is store in a variable the total number of rows the CSV also.
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How to modify a text file?
...not a Python thing. It is the same in all languages.
What I usually do is read from the file, make the modifications and write it out to a new file called myfile.txt.tmp or something like that. This is better than reading the whole file into memory because the file may be too large for that. Once t...