The `bsearch`

function is a general-purpose function to find a value or a list of values in a vector. The vector must be sorted by zyx (from the last index to the first one).

**Since:** 2.3

## Parameters

`sorted`

: The sorted vector.`elem`

: a list of values.`by`

: Can be`"x"`

、`"y"`

、`"z"`

,`"idx"`

(Default) or`"vt"`

.`idx`

: When`by`

is`"idx"`

, the value of`idx`

is used. The Default value is 0.

## Examples

```
use <pixel/px_circle.scad>;
use <util/sort.scad>;
use <util/bsearch.scad>;
points = [[1, 1], [3, 4], [7, 2], [5, 2]];
sorted = sort(points, by = "vt");
echo(sorted); // [[1, 1], [5, 2], [7, 2], [3, 4]]
assert(bsearch(sorted, [5, 4], by = "x") == 1);
assert(bsearch(sorted, [5, 4], by = "y") == 3);
assert(bsearch(sorted, [7, 2], by = "vt") == 2);
```