Define a primitive data type: Difference between revisions
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As of this writing, the official release of jq does not support modules, so we will not use jq's new module system here, but it would allow us to place all the smallint functions in a Smallint module.
To generate instances of smallint, we define a function, smallint(i), that will return an instance corresponding to an integer, i, if it is in range. As noted above, it will otherwise return nothing at all (as opposed to null or raising an error):<lang jq>def smallint(i): i as $i▼
▲smallint(i), that will return an instance corresponding to an integer, i, if it is in range. As noted above, it will otherwise return nothing at all (as opposed to null or raising an error):<lang jq>def smallint(i): i as $i
| if (i|type) == "number" and i == (i|floor) and i > 0 and i < 11 then {"type": "smallint", "value": i}
else empty
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