. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 840 65 分隔符文件 841 66 分布式计算 847 66.1 Cluster Manager Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reproducibility 1091 81 SHA 1093 82 序列化 1095 83 共享数组 1097 84 套接字 1099 85 稀疏数组 1105 85.1 压缩稀疏列 (CSC) 稀疏矩阵存储 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1105 85.2 稀疏向量储存 . . . . . . . . Julia 还拥有以下 优势： • 采用 MIT 许可证：免费又开源 • 用户自定义类型的速度与兼容性和内建类型一样好 • 无需特意编写向量化的代码：非向量化的代码就很快 • 为并行计算和分布式计算设计 • 轻量级的“绿色”线程：协程 • 低调又牛逼的类型系统 • 优雅、可扩展的类型转换和类型提升 • 对 Unicode 的有效支持，包括但不限于 UTF-8 • 直接调用 C 函数，无需封装或调用特别的

withenv(f, kv::Pair...) Execute f in an environment that is temporarily modified (not replaced as in setenv) by zero or more "var"=>val arguments kv. withenv is generally used via the withenv(kv...) do 3, 4]) 4-element Vector{Int64}: 2 2 6 4 julia> replace(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64, Int64} with 2 entries: 3 => 4 1 => 3 source Base.replace! – 4]) 4-element Vector{Int64}: 2 2 6 4 julia> replace!(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64, Int64} with 2 entries: 3 => 4 1 => 3 julia> replace!(x->2x, Set([3

withenv(f, kv::Pair...) Execute f in an environment that is temporarily modified (not replaced as in setenv) by zero or more "var"=>val arguments kv. withenv is generally used via the withenv(kv...) do 3, 4]) 4-element Vector{Int64}: 2 2 6 4 julia> replace(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64, Int64} with 2 entries: 3 => 4 1 => 3 source Base.replace! – 4]) 4-element Vector{Int64}: 2 2 6 4 julia> replace!(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64, Int64} with 2 entries: 3 => 4 1 => 3 julia> replace!(x->2x, Set([3

withenv(f, kv::Pair...) Execute f in an environment that is temporarily modified (not replaced as in setenv) by zero or more "var"=>val arguments kv. withenv is generally used via the withenv(kv...) do 3, 4]) 4-element Vector{Int64}: 2 2 6 4 julia> replace(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64, Int64} with 2 entries: 3 => 4 1 => 3 source Base.replace! – 4]) 4-element Vector{Int64}: 2 2 6 4 julia> replace!(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64, Int64} with 2 entries: 3 => 4 1 => 3 julia> replace!(x->2x, Set([3

withenv(f, kv::Pair...) Execute f in an environment that is temporarily modified (not replaced as in setenv) by zero or more "var"=>val arguments kv. withenv is generally used via the withenv(kv...) do 3, 4]) 4-element Vector{Int64}: 2 2 6 4 julia> replace(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64, Int64} with 2 entries: 3 => 4 1 => 3 source Base.replace! – 4]) 4-element Vector{Int64}: 2 2 6 4 julia> replace!(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64, Int64} with 2 entries: 3 => 4 1 => 3 julia> replace!(x->2x, Set([3

withenv(f, kv::Pair...) Execute f in an environment that is temporarily modified (not replaced as in setenv) by zero or more "var"=>val arguments kv. withenv is generally used via the withenv(kv...) do 3, 4]) 4-element Vector{Int64}: 2 2 6 4 julia> replace(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64, Int64} with 2 entries: 3 => 4 1 => 3 source Base.replace! – 4]) 4-element Vector{Int64}: 2 2 6 4 julia> replace!(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64, Int64} with 2 entries: 3 => 4 1 => 3 julia> replace!(x->2x, Set([3

withenv(f, kv::Pair...) Execute f in an environment that is temporarily modified (not replaced as in setenv) by zero or more "var"=>val arguments kv. withenv is generally used via the withenv(kv...) do 3, 4]) 4-element Vector{Int64}: 2 2 6 4 julia> replace(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64, Int64} with 2 entries: 3 => 4 1 => 3 source Base.replace! – 4]) 4-element Vector{Int64}: 2 2 6 4 julia> replace!(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64, Int64} with 2 entries: 3 => 4 1 => 3 julia> replace!(x->2x, Set([3

withenv(f, kv::Pair...) Execute f in an environment that is temporarily modified (not replaced as in setenv) by zero or more "var"=>val arguments kv. withenv is generally used via the withenv(kv...) do 3, 4]) 4-element Vector{Int64}: 2 2 6 4 julia> replace(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64, Int64} with 2 entries: 3 => 4 1 => 3 source Base.replace! – 4]) 4-element Vector{Int64}: 2 2 6 4 julia> replace!(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64, Int64} with 2 entries: 3 => 4 1 => 3 julia> replace!(x->2x, Set([3

withenv(f, kv::Pair...) Execute f in an environment that is temporarily modified (not replaced as in setenv) by zero or more "var"=>val arguments kv. withenv is generally used via the withenv(kv...) do 3, 4]) 4-element Vector{Int64}: 2 2 6 4 julia> replace(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64, Int64} with 2 entries: 3 => 4 1 => 3 source Base.replace! – 4]) 4-element Vector{Int64}: 2 2 6 4 julia> replace!(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64, Int64} with 2 entries: 3 => 4 1 => 3 julia> replace!(x->2x, Set([3

withenv(f::Function, kv::Pair...) Execute f in an environment that is temporarily modified (not replaced as in setenv) by zero or more "var"=>val arguments kv. withenv is generally used via the withenv(kv...) do 4]) 4-element Array{Int64,1}: 2 2 6 4 julia> replace(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64,Int64} with 2 entries: 3 => 4 1 => 3 source Base.replace! – Function 4]) 4-element Array{Int64,1}: 2 2 6 4 julia> replace!(Dict(1=>2, 3=>4)) do kv first(kv) < 3 ? first(kv)=>3 : kv end Dict{Int64,Int64} with 2 entries: 3 => 4 1 => 3 julia> replace!(x->2x, Set([3