immutable-quadtree-js:JS中的不可变四叉树

不可变的quadtree-js JS中的不可变四叉树 例子 var a = new ImmutableQuadTree(4); var b = a.add('0000', {_id: 'ABC'}); var c = b.add('0000', {_id: 'ABC'}); var d = c.add('0010', {_id: 'BBB'}); a === b; // false b === c; // true c === d; // false var e = d.keep('001');