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# sort
Sorts the elements of a list in ascending order. The list is a list-of-list construct, such as `[[a0, a1, a2...], [b0, b1, b2,...], [c0, c1, c2,...],...]` . When sorting, the function looks only at one index position of each sublist.
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**Since:** 2.0
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## Parameters
- `lt` : The original list.
- `by` : Can be `"x"` 、`"y"` 、`"z"` , or `"idx"` (Default).
- `idx` : When `by` is `"idx"` , the value of `idx` is used. The Default value is 0.
## Examples
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use < util / sort . scad > ;
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assert(
[[2, 0, 0], [5, 0, 0], [7, 0, 0], [9, 0, 0], [10, 0, 0]] ==
sort([[10, 0, 0], [5, 0, 0], [7, 0, 0], [2, 0, 0], [9, 0, 0]])
);
assert(
[[2, 0, 0], [5, 0, 0], [7, 0, 0], [9, 0, 0], [10, 0, 0]] ==
sort([[10, 0, 0], [5, 0, 0], [7, 0, 0], [2, 0, 0], [9, 0, 0]], by = "x")
);
assert(
[[0, 2, 0], [0, 5, 0], [0, 7, 0], [0, 9, 0], [0, 10, 0]] ==
sort([[0, 10, 0], [0, 5, 0], [0, 7, 0], [0, 2, 0], [0, 9, 0]], by = "idx", idx = 1)
);
