The developer hasn’t made a mistake when these happen, and there’s often little they can do to prevent it. The existence of these errors is not a bug (though failing to handle them can be). These aren’t the programmer’s fault.
I was also surprised by the discussion of stronger isolation in the paper. The paper claims snapshot isolation hasn’t been implemented in distributed systems yet, because it strictly requires a centralized global counter to serialize transactions. This is flagged as a fatal bottleneck and single point of failure.
。91视频对此有专业解读
here’s a subtle but important consequence: in RE#, rewriting your regex using boolean algebra is always safe. factor out common prefixes, distribute over union, apply de Morgan’s laws - the matches won’t change. your regex is a specification of a set of strings, and the engine faithfully finds the leftmost-longest element of that set in the input. no surprises from alternation order, no “well it depends on how PCRE explores this search tree”. just set theory.
Apple 2030 is the company’s ambitious plan to be carbon neutral across its entire footprint by the end of this decade by reducing product emissions from their three biggest sources: materials, electricity, and transportation. iPad Air is made with 30 percent recycled content,8 including 100 percent recycled aluminum in the enclosure and 100 percent recycled cobalt in the battery. It is manufactured with 40 percent renewable electricity, like wind and solar, across the supply chain. iPad Air is designed to be durable and repairable, and also offers industry-leading software support, while meeting Apple’s high standards for energy efficiency and safe chemistry. The paper packaging is 100 percent fiber-based and can be easily recycled.9