假设我有一个配置文件,每一行都包含空格分隔的值。在列上,我只有零。例子:
... # there is more configuration before the interesting stuff:
0 0 file /dev/stdin 224.0.68.54:12131
0 0 file /dev/stdin 224.0.68.55:12102
0 0 file /dev/stdin 224.0.68.49:12333
0 0 file /dev/stdin 224.0.68.60:12184
0 0 file /dev/stdin 224.0.68.62:12888
0 0 file /dev/stdin 224.0.68.77:12001
0 0 file /dev/stdin 224.0.68.33:12973
现在我想用它的索引增加第二列。那就是我想要这个结果:
0 0 file /dev/stdin 224.0.68.54:12131
0 1 file /dev/stdin 224.0.68.55:12102
0 2 file /dev/stdin 224.0.68.49:12333
0 3 file /dev/stdin 224.0.68.60:12184
0 4 file /dev/stdin 224.0.68.62:12888
0 5 file /dev/stdin 224.0.68.77:12001
0 6 file /dev/stdin 224.0.68.33:12973
如何在emacs lisp中做到这一点?或者任何其他的 Emacsen 做事方式?