have this:
0|1 1|1 0|0 1|0 .|1 0|.
want this:
1|0 0|0 1|1 0|1 .|0 1|.
I was thinking this would work:
sed -e 's/0/1/g' -e 's/1/0/g'
but just seems to give me all zeros
sed replace all zeros with ones and all ones with zero
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2 Answers
There is a slightly lesser-known sed command to transliterate, y, which comes in handy here:
$ sed 'y/01/10/' <<< '0|1 1|1 0|0 1|0 .|1 0|.'
1|0 0|0 1|1 0|1 .|0 1|.
Let's play computer.
Given this:
0|1 1|1 0|0 1|0 .|1 0|.
... change all 0s to 1s. Now you have this:
1|1 1|1 1|1 1|1 .|1 1|.
... OK, now you are stuck. There are only 1s left and you do not know which to change back.
... so instead change the 0s into 2s, just for a brief moment:
2|1 1|1 2|2 1|2 .|1 2|.
... now change the 1s to 0s
2|0 0|0 2|2 0|2 .|1 2|.
... and then the 2s to 1s
1|0 0|0 1|1 0|1 .|1 1|.
And now the grand finale:
$ sed -e 's/0/2/g' -e 's/1/0/g' -e 's/2/1/g'
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