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    • 语法进阶 / 子字符串
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    子字符串

    子字符串与String都是AbstractString的子类型,这意味着它们的许多函数都可以通用

    julia> sub=SubString("Cats!",2,4)
    "ats"
    
    julia> sub[1]
    'a': ASCII/Unicode U+0061 (category Ll: Letter, lowercase)
    
    julia> SubString(sub,1,2)
    "at"
    

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