V2EX = way to explore
V2EX 是一个关于分享和探索的地方
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This topic created in 2506 days ago, the information mentioned may be changed or developed.
root@2ecb7fe6d0ad:~# cat a.txt
1
2 3
4 a b
a d zz w
11 22s sc 1 3
root@2ecb7fe6d0ad:~# awk '{print $$1}' a.txt
1
3
a d zz w
root@2ecb7fe6d0ad:~# awk '{print $$2}' a.txt
1
4 a b
a d zz w
这个是什么姿势，求教
Supplement 1 · Jun 25, 2019
具体解释可以参考 Indirect field addressing
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