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I have a line with thousands of lines like this:

{"100K";"0.00001";"10";"0.01"]} {"101K";"0.0001";"100";"0.1"]} {"102K";"1";"1000";"1"]} {"102K";"1";"1000";"1"]} {"103K";"0.01";"10000";"10"]} {"104K";"0.1";"100000";"100"]} {"105K";"1";"1000000";"1000"]} {"109K";"0.000001";"1";"1"]} {"120K";"0.000012";"12";"12"]}

I want to replace the first occurrence of ; in a line with :[

Making these lines equal to

{"100K":["0.00001";"10";"0.01"]} {"101K":["0.0001";"100";"0.1"]} {"102K":["1";"1000";"1"]} {"102K":["1";"1000";"1"]} {"103K":["0.01";"10000";"10"]} {"104K":["0.1";"100000";"100"]} {"105K":["1";"1000000";"1000"]} {"109K":["0.000001";"1";"1"]} {"120K":["0.000012";"12";"12"]}

how do I do that with sed or other unix command?

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3 Answers 3

Reset to default
7 
sed 's/;/:[/' file {"100K":["0.00001";"10";"0.01"]} {"101K":["0.0001";"100";"0.1"]} {"102K":["1";"1000";"1"]} {"102K":["1";"1000";"1"]} {"103K":["0.01";"10000";"10"]} {"104K":["0.1";"100000";"100"]} {"105K":["1";"1000000";"1000"]} {"109K":["0.000001";"1";"1"]} {"120K":["0.000012";"12";"12"]}
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  • 1
    if you add -i, you do it in one go. Commented Oct 9, 2018 at 16:00
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Since you tagged the question with :

awk '{ sub(/;/, ":["); print; }'
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You can try with below 2 commands also:

perl -pne "s/;/:[/" filename sed 's/;/:[/1' filename

Output:

{"100K":["0.00001";"10";"0.01"]} {"101K":["0.0001";"100";"0.1"]} {"102K":["1";"1000";"1"]} {"102K":["1";"1000";"1"]} {"103K":["0.01";"10000";"10"]} {"104K":["0.1";"100000";"100"]} {"105K":["1";"1000000";"1000"]} {"109K":["0.000001";"1";"1"]} {"120K":["0.000012";"12";"12"]}
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