Swift, true to its name, is moving fast. This week marks the beta release of Swift 1.2, a major update to the language. The Swift team has responded to so many of the community's requests in one fell swoop, we're overflowing with new and exciting features. Every line-item in this announcement is a big advancement: incremental builds, improved error messages and stability in Xcode, static class properties, support for C unions and bitfields, bridging of Swift enums to Objective-C, safer type casting, improvements to single-line closures, and more.

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