代码语言：julia

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代码描述：juiia常用数组操作代码

代码标签： 数组 操作

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

function printsum(a)
    # summary generates a summary of an object
    println(summary(a), ": ", repr(a))
end

# arrays can be initialised directly:
a1 = [1,2,3]
printsum(a1)
#> 3-element Array{Int64,1}: [1, 2, 3]

# or initialised empty:
a2 = []
printsum(a2)
#> 0-element Array{Any,1}: Any[]

# since this array has no type, functions like push! (see below) don't work
# instead arrays can be initialised with a type:
a3 = Int64[]
printsum(a3)
#> 0-element Array{Int64,1}: Int64[]

# ranges are different from arrays:
a4 = 1:20
printsum(a4)
#> 20-element UnitRange{Int64}: 1:20

# however they can be used to create arrays thus:
a4 = collect(1:20)
printsum(a4)
#> 20-element Array{Int64,1}: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 
#>  15, 16, 17, 18, 19, 20]

# arrays can also be generated from comprehensions:
a5 = [2^i for i = 1:10]
printsum(a5)
#> 10-element Array{Int64,1}: [2, 4, 8, 16, 32, 64, 128, 256, 512, 1024]

# arrays can be any type, so arrays of arrays can be created:
a6 = (Array{Int64, 1})[]
printsum.........完整代码请登录后点击上方下载按钮下载查看

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