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How to split a comma separated line in Bash?
What I need to do is write a bash script that will loop through this file line by line, and grab the first field as one value, and then save the rest of the line without the first field (and comma) as a separate variable. I have the following code so far: But i’m not sure how to parse each line.
How to loop through a comma separated shell variable?
Instead of the echo “$i” call above, between the do and done inside the for loop, you can invoke your procedure proc “$i”. Update: The above snippet works if the value of variable does not contain spaces. If you have such a requirement, please use one of the solutions that can change IFS and then parse your variable. Hope this helps.
Can you extract comma separated values from a variable?
The script should allow extracting arbitrary number of comma-separated values from $variable. You can use the following script to dynamically traverse through your variable, no matter how many fields it has as long as it is only comma separated.
How to iterate through a comma separated list?
You can find a broader approach in this solution to How to iterate through a comma-separated list and execute a command for each entry. I prefer to use tr instead of sed, becouse sed have problems with special chars like in some cases.
How to convert a string into a comma in Bash?
You can use grep: grep -o “+S+” in.txt | tr ‘n’ ‘,’ which finds the string starting with +, followed by any string S+, then convert new line characters into commas. This should be pretty quick for large files.
How to read a comma separated CVS file in Bash?
You can use while shell loop to read comma-separated cvs file. IFS variable will set cvs separated to, (comma). The read command will read each line and store data into each field. Let us see how to parse a CSV file in Bash running under Linux, macOS, *BSD or Unix-like operating systems.
What can I do with a comma separated CSV file?
Many Linux and Unix command line utility programs such as cut, paste, join, sort, uniq, awk, sed can split files on a comma delimiter, and can therefore process simple CSV files. For example: You learned how to read and parse comma-separated (CSV) file under a Linux or Unix-like system using bash while loop and read command.