CODEWITHSUNDEEP
filesed
Martin Forte
Martin Forte

Reputation: 873

Edit beginning and the end of a big file

I need to edit several files of 500MB or more as follow:

Original file:

{'key_1': true, 'key_2': 1},
{'key_1': true, 'key_2': 3},
...
{'key_1': false, 'key_2': 50},

Result:

[{'key_1': true, 'key_2': 1},
{'key_1': true, 'key_2': 3},
...
{'key_1': false, 'key_2': 50}]

Adding "[" to beginning and changing the last "," for "]".

I want to edit all the *.json files in a folder. Which is the most simple way?

Upvotes: 2

Views: 58

Answers (1)

John Zwinck
John Zwinck

Reputation: 249153

sed -i '1 s/^/[/; $ s/,$/]/' *.json

That is, on the first line, replace the beginning with [, and on the last line, replace the trailing , with ].

Upvotes: 5

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