[已解决] 谢谢各位 请教多行内容合并一行输出

tasteoftime_90

awk '{printf P$0=","}END{print""}' FILE
和awk '{printf $0 ","} END{print ""}' FILE
printf P$0="," 和 printf $0 "," 的差异在后者最后多了个逗号
可以稍微解释下吗回复 2# jason680


   

jason680

回复 21# tasteoftime_90

printf P  $0;         P=","
printf $0 ",";   

1. printf P  $0;   P=","
  output the common(",") and full line
  Note: didn't have common(",") in first item
  Note: first time the variable P is empty

2. printf $0 ","
output full line and the common(",")
Note: always have common in the end

tasteoftime_90

相关的这些内容 哪里有介绍吗？回复 22# jason680


   

tasteoftime_90

谢谢！回复 22# jason680