Unix - combine all rows into a comma-separated single row

Question

I have following values in a file in separate lines:
California
New York
Washington
South Carolina
Kansas

What would be unix script to disp

Answer 1

Use this command tr '\n' ',' < input_file

For single quotes use sed -e "s/^/'/" input_file | sed -e "s/$/'/" | tr '\n' ','

(Not tested for single/double quote escaping issues)

For variable NEW_VAR=$(echo $VAR | sed -e "s/^/'/" | sed -e "s/$/'/" | tr '\n' ',')