Ruby 数组sample()函数
Array#sample() : sample() 是一个数组类方法,它从数组中返回一个或n个随机元素。
语法。Array.sample()
参数。数组
返回:一个随机元素或数组中的n个随机元素。
例子 #1 :
# Ruby code for sample() 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]
# sample method example
puts "sample() method form : #{a.sample(2)}\n\n"
puts "sample() method form : #{b.sample(1)}\n\n"
puts "sample() method form : #{c.sample(3)}\n\n"
输出:
sample() method form : [6, nil]
sample() method form : [4]
sample() method form : [18, 22, 6]
例子 #2 :
# Ruby code for sample() method
# declaring array
a = ["abc", "nil", "dog"]
# declaring array
c = ["cat", nil]
# declaring array
b = ["cow", nil, "dog"]
# sample method example
puts "sample() method form : #{a.sample(2)}\n\n"
puts "sample() method form : #{b.sample(1)}\n\n"
puts "sample() method form : #{c.sample(3)}\n\n"
输出:
sample() method form : ["dog", "abc"]
sample() method form : ["dog"]
sample() method form : ["cat", nil]