is JQ Transform modifying numbers? How can I get past it?

Question

Why this ("Filter" in jqplay.org): {"key":633447818234478180}

returns this ("Result" in jqplay.org): {"key": 633447818234478200}

Original JSON doesn't matter.

Why is it changing 180 into 200? How can I overcome this? Is this a bug? A number too big?

Answer 1

I believe this is because jq can only represent legal JSON data and the number you've given is outside the range that can be represented without loss of precision. See also

• What is JavaScript's highest integer value that a number can go to without losing precision?

If you need to work with larger numbers as strings in jq you may want to try this library:

• jq-bigint
  A big integer library for working with possibly-signed arbitrarily long decimal strings. Written by Peter Koppstein (@pkoppstein) and released under the MIT license.