Re^2: reading/writing to a file

in reply to Re: reading/writing to a file
in thread reading/writing to a file

I agree that using Unix utilities is a good alternative for this problem, but note that

For the purpose of this problem at least (and, AFAIK, always),
```
sort foo.txt | uniq
[download]
```
can be replaced with a single sort command:
```
sort -u foo.txt
[download]
```
By itself, sort -u (or sort ... | uniq) is not enough to solve this problem. Something like GNU's comm is also required (zsh, YMMV):
```
% (comm -2 -3 sorted_new.txt sorted_exclude.txt; < dict.txt) | sort -u
+ \
> tmp
% mv tmp dict.txt
[download]
```
(BTW, if anyone knows how to avoid the temporary file above, I'd love to hear about it.)

the lowliest monk

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