Julia中从字符串中获取指定长度的子字符串——SubString()方法

SubString()是 julia 中的一个内置函数，用于返回指定父字符串s在i : j或r范围内的一部分，其中 i、j 和 r 作为参数给出。

Syntax:
SubString(string::AbstractString, i::Integer, j::Integer)
or
SubString(string::AbstractString, r::UnitRange)

Parameters:

• string: Specified parent string
• i: Specified starting index
• j: Specified last index
• r: Specified unit range

Returns: It returns a part of the specified parent string s within range i:j or r, where i, j and r is given as the parameter.

示例 1：

# Julia program to illustrate 
# the use of String SubString() method
  
# Finding a part of the parent string
# "Geeks" from starting index 1
# to ending index 3
println(SubString("Geeks", 1, 3))
  
# Finding a part of the parent string
# "GeeksforGeeks" from starting index 5
# to ending index 10
println(SubString("GeeksforGeeks", 5, 10))
  
# Finding a part of the parent string
# "Geeks" with unitrange 2
println(SubString("Geeks", 2))
  
# Finding a part of the parent string
# "GeeksforGeeks" with unit range 6
println(SubString("GeeksforGeeks", 6))

输出：

Gee
sforGe
eeks
forGeeks

示例 2：

# Julia program to illustrate 
# the use of String SubString() method
   
# Finding a part of the parent string
# "12345" from starting index 1
# to ending index 3
println(SubString("12345", 1, 3))
   
# Finding a part of the parent string
# "123456789" from starting index 5
# to ending index 8
println(SubString("123456789", 5, 8))
   
# Finding a part of the parent string
# "2468" with unitrange 2
println(SubString("2468", 2))

输出：

123
5678
468