const toUpperCase = (chunks) = {
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，这一点在im钱包官方下载中也有详细论述
(TL;DR: this is a blog post about the process of writing my guide to SDF fonts.)
The efficiency depends on the query size relative to the data distribution. A small query in a sparse region prunes almost everything. A query that covers the whole space prunes nothing (because every node overlaps), degenerating to a brute-force scan. The quadtree gives you the most benefit when your queries are spatially local, which is exactly the common case for map applications, game physics, and spatial databases.
在史蒂夫身上，我找到了导师。他激励我成长与自我挑战。加入苹果，对我来说不是换了一份工作，而是找到了使命。这是我做过最重要的决定。