Cleanup binary search (#79)

Co-Authored-By: Claude <[email protected]>

Author: cometkim

README.md

@@ -256,7 +256,7 @@ Since [Hermes doesn't support the `Intl.Segmenter` API](https://github.com/faceb
 
 | Name                         | Unicode® | ESM? |   Size    | Size (min) | Size (min+gzip) | Size (min+br) |
 |------------------------------|----------|------|----------:|-----------:|----------------:|--------------:|
-| `unicode-segmenter/grapheme` |   16.0.0 |    ✔️ |    16,056 |     12,150 |           5,070 |         3,761 |
+| `unicode-segmenter/grapheme` |   16.0.0 |    ✔️ |    16,031 |     12,149 |           5,063 |         3,792 |
 | `graphemer`                  |   15.0.0 |    ✖️ ️|   410,435 |     95,104 |          15,752 |        10,660 |
 | `grapheme-splitter`          |   10.0.0 |    ✖️ |   122,252 |     23,680 |           7,852 |         4,841 |
 | `@formatjs/intl-segmenter`*  |   15.0.0 |    ✖️ |   603,285 |    369,560 |          72,218 |        49,416 |
@@ -272,7 +272,7 @@ Since [Hermes doesn't support the `Intl.Segmenter` API](https://github.com/faceb
 
 | Name                         | Bytecode size | Bytecode size (gzip)* |
 |------------------------------|--------------:|----------------------:|
-| `unicode-segmenter/grapheme` |        22,110 |                11,566 |
+| `unicode-segmenter/grapheme` |        22,097 |                11,558 |
 | `graphemer`                  |       133,978 |                31,713 |
 | `grapheme-splitter`          |        63,835 |                19,137 |
 

src/core.js

@@ -67,13 +67,11 @@ export function findUnicodeRangeIndex(cp, ranges) {
   let lo = 0
     , hi = ranges.length - 1;
   while (lo <= hi) {
-    let mid = lo + hi >> 1
-      , range = ranges[mid]
-      , l = range[0]
-      , h = range[1];
-    if (l <= cp && cp <= h) return mid;
-    else if (cp > h) lo = mid + 1;
-    else hi = mid - 1;
+    let mid = lo + hi >>> 1
+      , range = ranges[mid];
+    if (cp < range[0]) hi = mid - 1;
+    else if (cp > range[1]) lo = mid + 1;
+    else return mid;
   }
   return -1;
 }