Ruby 数组的slice()函数

Array#slice() : slice()是Array类的一个方法，用于返回一个由索引范围指定的子数组。

语法。Array.slice()

参数。数组

返回：一个由索引范围指定的子数组。

例子 #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]

例子 #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