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26 lines
817 B
Markdown
26 lines
817 B
Markdown
# bsearch
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The `bsearch` function is a general-purpose function to search a value in a list whose elements must be sorted by zyx (from the last index to the first one).
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**Since:** 3.0
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## Parameters
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- `sorted` : The sorted list.
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- `target` : The target vector or a function literal that returns a negative integer, zero, or a positive integer as the element is less than, equal to, or greater than the value you want to search.
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## Examples
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use <util/sort.scad>
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use <util/bsearch.scad>
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points = [[1, 1], [3, 4], [7, 2], [5, 2]];
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sorted = sort(points, by = "vt"); // [[1, 1], [5, 2], [7, 2], [3, 4]]
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assert(bsearch(sorted, [7, 2]) == 2);
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xIs5 = function(elem) elem[0] - 5;
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assert(bsearch(sorted, xIs5) == 1);
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yIs4 = function(elem) elem[1] - 4;
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assert(bsearch(sorted, yIs4) == 3); |