我有一个平面文件，我想从所有的行中parsing奇数列。
我对UNIX非常陌生，我接触的方式是这样的
awk 'BEGIN{ FS = OFS = "|" } { for (i=2;i<=NF;i++) { if(i%2==0) { print $i }}}' newProcessFile.txt 显然它不会产生所需的输出。 我究竟做错了什么 ？ 请解释 。
你可以做awk
awk '{for (i=1;i<=NF;i+=2) printf "%s ",$i;print ""}' file
它会打印每隔一列。
cat file one one two one two three one two three four one two three four five one two three four five six
awk '{for (i=1;i<=NF;i+=2) printf "%s ",$i;print ""}' file one one one three one three one three five one three five
与其他分离器：
cat file one one|two one|two|three one|two|three|four one|two|three|four|five one|two|three|four|five|six
awk -F\| '{s="";for (i=1;i<=NF;i+=2) {s=s?s FS $i:$i} print s}' file one one one|three one|three one|three|five one|three|five