What are 0xcafe, 0xC0FEE, and others seen in every tutorial? #204
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Discord user IDjulizamt Describe your question in detail.What are 0xcafe, 0xC0FEE, and others seen in every tutorial? Are they special addresses anyhow or just placeholders? What error, if any, are you getting?No response What have you tried or looked at? Or how can we reproduce the error?N/A Which operating system are you using?Windows Which SDK or tool are you using? (if any)TypeScript SDK Describe your environment or tooling in detailNo response |
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These are just placeholders. When I used to do computer hardware, we often used some fun "hex words" that can be used as an easy to recognize placeholder. The docs often refer to either:
And plenty more https://en.wikipedia.org/wiki/Magic_number_(programming)#Debug_values |
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Something to note here is that we need to use characters that are valid in the hexadecimal numerical system, which only includes the digits 0-9 and the letters A-F (case-insensitive). So if you try and use something like |
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Here's an example of multiple being used in Move unit tests. |
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These are just placeholders. When I used to do computer hardware, we often used some fun "hex words" that can be used as an easy to recognize placeholder.
The docs often refer to either:
0x42Hitchhikers guide0xCAFEor0xcafe-> Like a Cafe0xC0FFEEor0xC0FEE-> Like a cup of Coffee0xDEAD,0xBEEFor0xDEADBEEF0xB0B0xA11CE0xBADAnd plenty more https://en.wikipedia.org/wiki/Magic_number_(programming)#Debug_values