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refactor

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This commit is contained in:
Justin Lin 2020-03-13 13:21:13 +08:00
parent f4592293b5
commit eab84a99a1
2 changed files with 8 additions and 7 deletions
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7
src/util/_impl/_bsearch_impl.scad Normal file
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@ -0,0 +1,7 @@
use <util/_impl/_vt_default_comparator.scad>;
function _binary_search(sorted, elem, low, upper) =
low > upper ? -1 :
let(mid = floor((low + upper) / 2))
lessThan(sorted[mid], elem) ? _binary_search(sorted, elem, mid + 1, upper) :
greaterThan(sorted[mid], elem) ? _binary_search(sorted, elem, low, mid - 1) : mid;

8
src/util/bsearch.scad
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@ -1,10 +1,4 @@
use <util/_impl/_vt_default_comparator.scad>;
function _binary_search(sorted, elem, low, upper) =
low > upper ? -1 :
let(mid = floor((low + upper) / 2))
lessThan(sorted[mid], elem) ? _binary_search(sorted, elem, mid + 1, upper) :
greaterThan(sorted[mid], elem) ? _binary_search(sorted, elem, low, mid - 1) : mid;
use <util/_impl/_bsearch_impl.scad>;
// for example, `sorted` is by zyx
function bsearch(sorted, elem) = _binary_search(sorted, elem, 0, len(sorted) - 1);