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What is the difference between index and *underscore*?
1 | i , v in ipairs | _,v in ipairs |
What is the difference between those two?
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I think you use _, when you don't need the index. --_(*-*)_-- ady1111 8 — 5y
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There is no difference. '_' and 'i' are just variable names. DeceptiveCaster 3761 — 5y
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When you have a table and want to cycle through it, you have two options. ipairs(a) and pairs(a). I do not know the detailed implementation of each, but what they do is that they move through a (in this case a list) and assign values to variables. Let's focus on ipairs(a) here. What ipairs(a) does it returns the index and value of each entry in the key. For example, a simple loop like this:
1 | local a = {1, 3, 4, 2} |
2 |
3 | for i, j in ipairs(a) do |
4 | print(i, j) |
5 | end |
...will print:
1 | 1 1 |
2 | 2 3 |
3 | 3 4 |
4 | 4 2 |
The thing is, many times you do not need the index, and _ is a "throwaway" variable, meaning you do not need the value assigned to it.
I don't exactly know how to explain this properly, but I think you can find a better answer here.
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Wait can I just say "i , _" and it replaces the v with _? RebornedSnoop 175 — 5y
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@RebornedSnoop, yes you could, as they are variable names 123nabilben123 499 — 5y