新闻 Julia 0.6.0 发布，动态编程语言 下载

Julia 0.6.0 发布了。Julia是一个新的高性能动态高级编程语言。语法和其他编程语言类似，易于其他语言用户学习。Julia拥有丰富的函数库，提供了数字精度、精致的增幅 器（sophisticated amplifier）和分布式并行运行方式。核心函数库等大多数库是由Julia编写，但也用成熟的C和FORTRAN库来处理线性代数、随机数产生和字 符串处理等问题。Julia语言可定义函数并且根据用户自定义的参数类型组合再进行重载。

新的语言特性：

New type system capabilities (#8974, #18457)

• 
  Type parameter constraints can refer to previous parameters, e.g. type Foo{R<:Real, A<:AbstractArray{R}}. Can also be used in method definitions.
  
  
• 
  New syntax Array{T} where T<:Integer, indicating a union of types over all specified values of T (represented by a UnionAll type). This provides behavior similar to parametric methods or typealias, but can be used anywhere a type is accepted. This syntax can also be used in method definitions, e.g. function inv(M::Matrix{T}) where T<:AbstractFloat. Anonymous functions can have type parameters via the syntax ((x::Array{T}) where T<:Real) -> 2x.
  
  
• 
  Implicit type parameters, e.g. Vector{<:Real} is equivalent to Vector{T} where T<:Real, and similarly for Vector{>:Int} (#20414).
  
  
• 
  Much more accurate subtype and type intersection algorithms. Method sorting and identification of equivalent and ambiguous methods are improved as a result.
  

语言变化：

• 
  "Inner constructor" syntax for parametric types is deprecated. For example, in this definition:
  
  type Foo{T,S<:Real}
  x
  Foo(x) = new(x)
  end
  
  
  the syntax Foo(x) = new(x) actually defined a constructor for Foo{T,S}, i.e. the case where the type parameters are specified. For clarity, this definition now must be written as Foo{T,S}(x) where {T,S<:Real} = new(x) (#11310, #20308).
  
  
• 
  The keywords used to define types have changed (#19157, #20418).
  
  In 0.6, immutable and type are still allowed as synonyms without a deprecation warning.
  
  
  • 
    immutable changes to struct
    
    
  • 
    type changes to mutable struct
    
    
  • 
    abstract changes to abstract type ... end
    
    
  • 
    bitstype 32 Char changes to primitive type Char 32 end
    
• 
  ……
  

完整更新内容请查看更新日志。

下载地址：

• 
  Source code (zip)
  
  
• 
  Source code (tar.gz)
  

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Julia 0.6.0 发布，动态编程语言下载地址