nytpu on Nostr: Just learned possibly the most cursed C fact IMO: array[i] is equivalent to *(array + ...
Just learned possibly the most cursed C fact IMO: array[i] is equivalent to *(array + i) per the spec, which means i[array] works exactly the same, since the + operator is commutative. It also works for multidimensional/nested arrays and the “outside” index doesn't even need to be a symbol, so you can even do things like 0[array]1, equivalent to array[0][1] and *(*(array + 0) + 1). This is a new level beyond pointer decay, which generally makes sense even if it's irritating
Per: gemini://foo.zone/gemfeed/2024-07-05-random-weird-things.gmi
Published at
2024-07-11 13:58:07Event JSON
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"content": "Just learned possibly the most cursed C fact IMO: array[i] is equivalent to *(array + i) per the spec, which means i[array] works exactly the same, since the + operator is commutative. It also works for multidimensional/nested arrays and the “outside” index doesn't even need to be a symbol, so you can even do things like 0[array]1, equivalent to array[0][1] and *(*(array + 0) + 1). This is a new level beyond pointer decay, which generally makes sense even if it's irritating\n\nPer: gemini://foo.zone/gemfeed/2024-07-05-random-weird-things.gmi",
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