08-27-周三_17-09-29

node_modules/d3/src/arrays/bisect.js

@@ -0,0 +1,36 @@
+import "ascending";
+
+function d3_bisector(compare) {
+  return {
+    left: function(a, x, lo, hi) {
+      if (arguments.length < 3) lo = 0;
+      if (arguments.length < 4) hi = a.length;
+      while (lo < hi) {
+        var mid = lo + hi >>> 1;
+        if (compare(a[mid], x) < 0) lo = mid + 1;
+        else hi = mid;
+      }
+      return lo;
+    },
+    right: function(a, x, lo, hi) {
+      if (arguments.length < 3) lo = 0;
+      if (arguments.length < 4) hi = a.length;
+      while (lo < hi) {
+        var mid = lo + hi >>> 1;
+        if (compare(a[mid], x) > 0) hi = mid;
+        else lo = mid + 1;
+      }
+      return lo;
+    }
+  };
+}
+
+var d3_bisect = d3_bisector(d3_ascending);
+d3.bisectLeft = d3_bisect.left;
+d3.bisect = d3.bisectRight = d3_bisect.right;
+
+d3.bisector = function(f) {
+  return d3_bisector(f.length === 1
+      ? function(d, x) { return d3_ascending(f(d), x); }
+      : f);
+};