红宝石 |数组类 flatten()函数
flatten()是一个 Array 类方法,它返回扁平数组,即一维数组
Syntax: Array.flatten()
Parameter: Array
Return: 1D array
示例 #1:
# Ruby code for flatten() method
# declaring array
a = [[18, 22],
[ 33, nil, 5, 6]]
# declaring array
b = [[[1, 4, 1, 1, 88, 9]]]
# flatten
puts "flatten : #{a.flatten()}\n\n"
# flatten
puts "flatten : #{b.flatten()}\n\n"
输出 :
flatten : [18, 22, 33, nil, 5, 6]
flatten : [1, 4, 1, 1, 88, 9]
示例 #2:
# Ruby code for flatten() method
# declaring array
a = [["abc", "nil", ],
["dog"]]
# declaring array
b = [[[["cow", nil, "dog"]]]]
# flatten
puts "flatten : #{a.flatten()}\n\n"
# flatten
puts "flatten : #{b.flatten()}\n\n"
输出 :
flatten : ["abc", "nil", "dog"]
flatten : ["cow", nil, "dog"]