Allow NaN/Infinity as a Number

[alex-unearth]

No description provided.

[wabscale]

Hey this would be good to add. I use jless for data produced from numerical calculations where NaNs and Infs come up from time to time. Being able to use jless with those would be quite useful for me and my team.

[codeinred]

As a note - python spits out NaN and Infinity when serializing those values. Python is also able to deserialize NaN and Infinity:

import json
from math import nan, inf

json_str = json.dumps(
    {
        'x': nan,
        'x2': -nan,
        'y': inf,
        'z': -inf,
    },
    indent=4
)

print(f"(json with nan/inf)")
print(json_str)


result = json.loads(json_str)

print(f"x = {result['x']}")
print(f"y = {result['y']}")
print(f"z = {result['z']}")

Output:

(json with nan/inf)
{
    "x": NaN,
    "x2": NaN,
    "y": Infinity,
    "z": -Infinity
}
x = nan
y = inf
z = -inf