Vector tweaks

lib/vector.js

@@ -20,7 +20,7 @@ export default class Vector {
       let e = 0;
 
       for (let j = 0; j < n; j++) {
-        e |= (cs[i + j] ? 1 : 0) << n - j - 1;
+        e |= (cs[i + j] ? 1 : 0) << (n - j - 1);
       }
 
       c[c.length] = e;
@@ -81,7 +81,7 @@ export default class Vector {
     let b = 7;
 
     for (let i = 0, n = c.length; i < n; i++) {
-      b ^= 31 * b + c[i] + (b << 6) + (b >> 2);
+      b ^= (31 * b) + c[i] + (b << 6) + (b >> 2);
     }
 
     return b ^ (b >> 32);
@@ -94,7 +94,19 @@ export default class Vector {
    * @return {boolean} `true` if the vectors are equal, otherwise `false`.
    */
   equals(v) {
-    return Vector.distance(this, v) === 0;
+    if (this.l !== v.l) {
+      return false;
+    }
+
+    const c = this.c;
+
+    for (let i = 0, n = c.length; i < n; i++) {
+      if (c[i] !== v.c[i]) {
+        return false;
+      }
+    }
+
+    return true;
   }
 
   /**
@@ -142,7 +154,7 @@ export default class Vector {
    * @return {Vector}
    */
   static random(l) {
-    const c = Array(l);
+    const c = new Array(l);
 
     for (let i = 0; i < l; i++) {
       c[i] = (Math.random() + 0.5) | 0;