• pelya
      link
      193 days ago

      In Lua all arrays are just dictionaries with integer keys, a[0] will work just fine. It’s just that all built-in functions will expect arrays that start with index 1.

      • my_hat_stinks
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        fedilink
        83 days ago

        That’s slightly misleading, I think. There are no arrays in Lua, every Lua data structure is a table (sometimes pretending to be something else) and you can have anything as a key as long as it’s not nil. There’s also no integers, Lua only has a single number type which is floating point. This is perfectly valid:

        local tbl = {}
        local f = function() error(":(") end
        
        tbl[tbl] = tbl
        tbl[f] = tbl
        tbl["tbl"] = tbl
        
        print(tbl)
        -- table: 0x557a907f0f40
        print(tbl[tbl], tbl[f], tbl["tbl"])
        -- table: 0x557a907f0f40	table: 0x557a907f0f40	table: 0x557a907f0f40
        
        for key,value in pairs(tbl) do
          print(key, "=", value)
        end
        -- tbl	=	table: 0x557a907f0f40
        -- function: 0x557a907edff0	=	table: 0x557a907f0f40
        -- table: 0x557a907f0f40	=	table: 0x557a907f0f40
        
        print(type(1), type(-0.5), type(math.pi), type(math.maxinteger))
        -- number	number	number	number
        
      • @[email protected]
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        fedilink
        33 days ago

        PHP did that same thing. It was a big problem when algorithmic complexity attacks were discovered. It took PHP years to integrate an effective solution that didn’t break everything.

    • db0
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      fedilink
      103 days ago

      Fortran angrily starts typing…

      • db0
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        fedilink
        143 days ago

        I always felt that Lua was a girl

        • Sonotsugipaa
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          fedilink
          English
          183 days ago

          Lua - Portuguese feminine noun for “moon”, coming from the Latin “luna”
          Luna - Latin, feminine noun (coincidentally identical to the Italian noun, also feminine)

          Yup, Lua is a girl.