Julia: Join與字符串Array

我們經常在pyhon中用join處理字符串的某種規則的連接。在Julia中，又是如何?

用法：
join([io::IO,] strings [, delim [, last]])

1、後面都加一個符號

julia> a
3-element Array{String,1}:
 "a"
 "b"
 "c"
julia> join(a,",")
"a,b,c"

2、首尾拼接

後面拼接的只能是，首部連接字符和尾部連接字符。

julia> join(a,",","or") # 首部是“,”,尾部是“or”
"a,borc"

julia> join(a,","," ")
"a,b c"

julia> str =[" ","or"]
2-element Array{String,1}:
 " "
 "or"

julia> join(a,str...)
"a borc"

3、簡單相連

julia> e =["a","b","c","d"]
4-element Array{String,1}:
 "a"
 ⋮
 "d"
 
julia> join(e)
"abcd"