Comparison of error-diffusion vs ordered dithering using an 8-colour irregular palette. Left to right: original image, error-diffusion, ordered.
The rewrite engine is an absolutely brilliant invention by John Brant and Don Roberts, introduced with the Refactoring Browser (see “A Refactoring Tool for Smalltalk”, 1997). It gives us AST-level matching and rewriting with astonishing power.
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generate code in multiple programming languages
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描述：nums1 中数字 x 的「下一个更大元素」是指 x 在 nums2 中对应位置右侧的第一个比 x 大的元素。给你两个没有重复元素的数组 nums1 和 nums2，其中 nums1 是 nums2 的子集。对于每个 nums1[i]，找出其在 nums2 中的下一个更大元素；若不存在，返回 -1。，这一点在safew官方版本下载中也有详细论述
This combination – localized Dijkstra, super-fast abstract graph traversal, and highly localized A* refinement – is what delivers the 100x speedup.