arrays - &-> 在 ruby​​ 中是什么意思

Question

试图理解这个问题的解决方案，但我不知道这个符号是什么意思&->有人可以帮忙吗

# Say you have an array for which the ith element is the price of a given
# stock on day i. Design an algorithm to find the maximum profit. You may
# complete as many transactions as you like (ie, buy one and sell one share
# of the stock multiple times). However, you may not engage in multiple
# transactions at the same time (ie, you must sell the stock before you buy
# again).


def max_profit(prices)
  prices.each_cons(2).map(&->(p1, p2){ [p2 - p1, 0].max }).reduce(0, &:+)
end

Answer 1

是两个运算符在一起。 -> 创建一个 lambda，& 将其作为 block 传递。