Using awk (or sed) to remove newlines based on first character of next line

Question

here\'s my situation: I had a big text file that I wanted to pull certain information from. I used sed to pull all the relevant information based on regexp\'s, but each \"piece\

Answer 1

sedsed -d -n ':t;/^,/!x;H;n;/^,/{x;$!bt;x;H};x;s/\n//g;p;${x;/^,/!p}' filename