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Evil Ones (lemmy.world)

submitted 2 days ago by aburtang@lemmy.world to c/programmerhumor@lemmy.ml

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[–] tyler@programming.dev 1 points 6 hours ago (1 children)

JavaScript only has a single number type, so 0.0 is the same as 0. Thus when you are sending a JS object as JSON, in certain situations it will literally change 0.0 to 0 for you and send that instead (same with any number that has a zero decimal). This will cause casting errors in other languages when they attempt to deserialize ints into doubles or floats.

[–] masterspace@lemmy.ca 0 points 5 hours ago* (last edited 5 hours ago) (1 children)

It will cause casting errors in other languages that have badly written, non-standards compliant, JSON parsers, as 1 and 1.0 being the same is part of the official JSON ISO standard and has been for a long time: https://json-schema.org/understanding-json-schema/reference/numeric

[–] tyler@programming.dev 0 points 3 hours ago* (last edited 3 hours ago) (1 children)

JSON schema is not a standard lol. 😂 it especially isn’t a standard across languages. And it most definitely isn’t an ISO standard 🤣. JSON Data Interchange Format is a standard, but it wasn’t published until 2017, and it doesn’t say anything about 1.0 needs to auto cast to 1 (because that would be fucking idiotic). https://datatracker.ietf.org/doc/html/rfc8259

JSON Schema does have a draft in the IETF right now, but JSON Schema isn’t a specification of the language, it’s for defining a schema for your code. https://datatracker.ietf.org/doc/draft-handrews-json-schema/

Edit: and to add to that, JavaScript has a habit of declaring their dumb bugs as “it’s in the spec” years after the fact. Just because it’s in the spec doesn’t mean it’s not a bug and just because it’s in the spec doesn’t mean everywhere else is incorrect.

[–] masterspace@lemmy.ca 1 points 2 hours ago* (last edited 2 hours ago)

Yes, it most literally and inarguably is:

https://www.iso.org/standard/71616.html

Page 3 of INTERNATIONAL STANDARD

ISO/IEC 21778 - Information technology — The JSON data interchange syntax

8 Numbers A number is a sequence of decimal digits with no superfluous leading zero. It may have a preceding minus sign (U+002D). It may have a fractional part prefixed by a decimal point (U+002E). It may have an exponent, prefixed by e (U+0065) or E (U+0045) and optionally + (U+002B) or – (U+002D). The digits are the code points U+0030 through U+0039.