📜  红宝石 |数组移位()函数

📅  最后修改于: 2022-05-13 01:54:43.405000             🧑  作者: Mango

红宝石 |数组移位()函数

Array#shift() : shift()是一个 Array 类方法,它删除 self 的第一个元素并返回它,如果数组为空则返回 nil。

示例 #1:

# Ruby code for shift() 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]
  
# shift method example
puts "shift() method form : #{a.shift()}\n\n"
  
puts "shift() method form : #{b.shift(2)}\n\n"
  
puts "shift() method form : #{c.shift(3)}\n\n"

输出 :

shift() method form : 18

shift() method form : [1, 4]

shift() method form : [18, 22, 50]

示例 #2:

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

输出 :

shift() method form : abc

shift() method form : cow

shift() method form : cat