README

ldjtab extract a list of values from a given key and the line number of the document from a line-delimited JSON file. It's reasonably fast and will try to utilize all cores.

For a more interesting extractions, use jq.

Install with:

$ go get github.com/miku/ldjtab/cmd/...

Note: There are two binaries at the moment: ldjtab and uldjtab. ldjtab works in parallel, is a bit faster, but does not guarantee order. uldjtab is a bit slower, lighter on resources and preserves order.

Example:

$ cat fixtures/test.txt
{"id": 1, "name": "A"}
{"id": 2, "name": "B"}
{"id": 3, "name": "C"}

$ ldjtab -key name fixtures/test.txt
A    0000000001
B    0000000002
C    0000000003

$ uldjtab -key name fixtures/test.txt
A    0000000001
B    0000000002
C    0000000003

Use case

JSON file compaction.