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25 lines
732 B
Markdown
25 lines
732 B
Markdown
# has
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If `lt` contains `elem`, this function returns `true`. If you want to test elements repeatly, sorting `lt` first and setting `sorted` to `true` will be faster.
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**Since:** 2.3
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## Parameters
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- `lt` : A list of vectors.
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- `elem` : A vector.
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- `sorted` : If `false` (default), use native `search`. If `true`, `lt` must be sorted by zyx (from the last index to the first one) and `has` will use binary search internally.
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## Examples
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use <pixel/px_circle.scad>;
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use <util/sort.scad>;
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use <util/has.scad>;
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pts = px_circle(10);
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assert(has(pts, [2, -10]));
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assert(!has(pts, [0, 0]));
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sorted_pts = sort(pts, by = "vt");
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assert(has(sorted_pts, [2, -10]));
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assert(!has(sorted_pts, [0, 0])); |