红宝石 |数组切片（）函数

Array#slice() : slice()是一个 Array 类方法，它返回一个由索引范围指定的子数组。

Syntax: Array.slice()

Parameter: Array

Return: a subarray specified by range of indices.

示例 #1：

# Ruby code for slice() method
  
# declaring array
a = [18, 22, 33, nil, 5, 6]
  
# declaring array
b = [1, 4, 1, 1, 88, 9]
  
# declaring array
c = [18, 22, 50, 6]
  
# slice method example
puts "slice() method form : #{a.slice(2, 4)}\n\n"
  
puts "slice() method form : #{b.slice(1, 3)}\n\n"
  
puts "slice() method form : #{c.slice(2, 3)}\n\n"

输出 ：

slice() method form : [33, nil, 5, 6]

slice() method form : [4, 1, 1]

slice() method form : [50, 6]

示例 #2：

# Ruby code for slice() method
  
# declaring array
a = ["abc", "nil", "dog"]
  
# declaring array
c = ["cat", nil]
  
# declaring array
b = ["cow", nil, "dog"]
  
  
# slice method example
puts "slice() method form : #{a.slice(1, 3)}\n\n"
  
puts "slice() method form : #{b.slice(1, 2)}\n\n"
  
puts "slice() method form : #{c.slice(0)}\n\n"

输出 ：

slice() method form : ["nil", "dog"]

slice() method form : [nil, "dog"]

slice() method form : cat