F# 4.0 发布，标准化 Array, List 和 Seq 模块
腾讯SNG夏日招聘集结号：200个空缺岗位，JAVA、C++、云计算、Android……Visual F# 4.0 发布，此版本现已提供下载：
https://www.visualstudio.com/downloads/download-visual-studio-vs。
F# 4.0 包含新的语言特性：
[*] 构造函数作为一级函数
[*] 可变值的使用简化
[*] 支持高维的数组
[*] 支持方法中的静态参数
[*] 简化列表的语法
[*] 简化 printf 函数的使用
[*] GC 优化提升性能
API 改进：
[*] 标准化和扩展 Array, List 和 Seq 模块
[*] New APIs for 4.0: chunkBySize, contains, except, findBack, findInstanceBack, indexed, item, mapFold, mapFoldBack, sortByDescending, sortDescending, splitInto, tryFindBack, tryFindIndexBack, tryHead, tryItem, tryLast
[*] 其他新 API
[*] Option.filter, Option.toObj, Option.ofObj, Option.toNullable, Option.ofNullable
[*] String.filter
[*] Checked.int8, Checked.uint8
[*] Async.AwaitTask (non-generic)
[*] WebClient.AsyncDownloadFile, WebClient.AsyncDownloadData
[*] tryUnbox, isNull
其他值得关注的改进：
[*] New active pattern to match constant Decimal in quotations
[*] Slicing support for lists
[*] Support for consuming high-rank (> 4) arrays
[*] Support for units of measure in printf-family functions
[*] Support for constructors/class names as first-class functions
[*] Improved exception stack traces in async code
[*] Automatic mutable/ref conversion
[*] Support for static arguments to provided methods
[*] Support for non-nullable provided types
[*] Added NonStructuralComparison module containing non-structural comparison operators
[*] Support for rational exponents in units of measure
[*] Give fsi.exe, fsiAnyCpi.exe nice icons
[*] Microsoft. optional in namepsace paths from FSharp.Core
[*] Support for extension properties in object initializers
[*] Pre-support (not yet used) for additional nativeptr intrinsics
[*] Simplified, more robust resolution of type references in quotations
[*] Support for inheritance of types that have multiple interface instantiations
[*] Extended preprocessor grammar
[*] Support for implicit quotation of expressions used as method arguments
[*] Support for multiple properties in []
[*] Eliminate tuple allocation for implicitly returned formal arguments
[*] Perf: fsc.exe now uses GCLatencyMode.Batch
[*] Perf: Improved hash/compare/distinctBy/groupBy performance
[*] Perf: Seq.toArray perf improvement
[*] Perf: Use OptimizedClosures.FSharpFunc in seq.fs where applicable
[*] Perf: Use literals and mutable variables instead of ref cells for better performance in SHA1 calc
[*] Perf: Use smart blend of System.Array.Copy and iterative copy for array copies
[*] Perf: Change Seq.toList to mutation-based to remove>List.rev
[*] Perf: Change pdbClose to test if files are locked before inducing GCs
[*] Perf: Use server GC mode for compiler
Visual Studio 方面的改进：
[*] Updated all templates (except tutorial) to include AssemblyInfo.fs setup in the same manner as default C# project templates
[*] Add keyboard shortcuts for FSI reset and clear all
[*] Improved debugger view for Map values
[*] Improved performance reading stdout/stderr from fsi.exe to F# Interactive window
[*] Support for VS project up-to-date check
[*] Improved project template descriptions, make it clearer how to target Xamarin platforms
[*] Intellisense completion in object initializers
[*] Add menu entry "Open folder in File Explorer" on folder nodes
[*] Intellisense completion for named arguments
[*] Alt+Enter sends current line of code to interactive if there is no selection
[*] Support for debugging F# scripts with the VS debugger
[*] Add support for hexadecimal values (like 0xFF) ??to MSBuild property BaseAddress
[*] Updated menu icons used for F# interactive to align with other VS interactive windows
此外还有写 bug 修复，详细改进内容请看更新日志。
F#是由微软发展的为微软.NET语言提供运行环境的程序设计语言，是函数编程语言（FP，Functional Programming），函数编程语言最重要的基础是Lambda Calculus。它是基于OCaml的，而OCaml是基于ML函 数程式语言。有时F# 和 OCaml 的程式是可以交互编译的。
F#已经接近成熟，支援Higher-Order Function、Currying、Lazy Evaluation、Continuations、Pattern Matching、Closure、List Processing、Meta-Programming。这是一个用于显示.NET在不同编程语言间互通的程序设计，可以被.NET中的任意其它代码编译和调用。
F#将被集成在Visual Studio 2010中，含有对.Net Framework的完全支持。
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