Programmer Humor

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Surely "1337" is the same as 1337, right? (sopuli.xyz)

submitted 4 months ago by [email protected] to c/[email protected]

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Meme transcription:

Panel 1: Bilbo Baggins ponders, “After all… why should I care about the difference between int and String?

Panel 2: Bilbo Baggins is revealed to be an API developer. He continues, “JSON is always String, anyways…”

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[–] [email protected] 5 points 4 months ago (7 children)

I’m not sure if you’re getting it, so I’ll explain just in case.

In computer science a few conventions have emerged on how numbers should be interpreted, depending on how they start:

decimal (the usual system with digits from 0 to 9): no prefix
binary (digits 0 and 1): prefix 0b, so 0b1001110
octal (digits 0 through 7): prefix 0, so 0116
hexadecimal (digits 0 through 9 and then A through E): prefix 0x, so 0x8E

If your zip code starts with 9, it won’t be interpreted as octal. You’re fine.

[–] [email protected] 7 points 4 months ago* (last edited 4 months ago) (6 children)

Well, you're right. I wasn't getting it, but I've also never seen any piece of software that would treat a single leading zero as octal. That's just a recipe for disaster, and it should use 0o116 to be unambiguous

(I am a software engineer, but was assuming you meant it was hardcoded to parse as octal, not some weird auto-detect)

[–] [email protected] 7 points 4 months ago (1 children)

I’ve also never seen any piece of software that would treat a single leading zero as octal

I thought JavaScript did that, but it turns out it doesn’t. I thought Java did that, but it turns out it doesn’t. Python did it until version 2.7: https://docs.python.org/2.7/library/functions.html#int. C still does it: https://en.cppreference.com/w/c/string/byte/strtol

[–] [email protected] 6 points 4 months ago* (last edited 4 months ago)

Interesting that strtol in C does that. I've always explicitly passed in base 10 or 16, but I didn't know it would auto-detect if you passed 0. TIL.

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