红宝石 |数组 drop() 操作

Array#drop() : drop()是一个 Array 类方法，它从数组中删除前“n”个元素并返回剩余的元素。

Syntax:  Array.drop()

Parameter:  'n' - no. of elements to drop.

Return:  array after removing first n elements

代码 #1：drop() 方法的示例

# Ruby code for drop() method
  
# declaring array
a = [18, 22, 33, nil, 5, 6]
  
# declaring array
b = [1, 4, 1, 1, 88, 9]
  
# declaring array
c = [18, 22, nil, nil, 50, 6]
  
# drop
puts "drop : #{a.drop(5)}\n\n"
  
# drop
puts "drop : #{b.drop(0)}\n\n"
  
# drop
puts "drop : #{c.drop(20)}\n\n"

输出 ：

drop : [6]

drop : [1, 4, 1, 1, 88, 9]

drop : []

代码 #2：drop() 方法的示例

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

输出 ：

drop : ["dog"]

drop : ["cow", nil, "dog"]

drop : []