ruby 从标准快速读取

本文介绍了ruby 从标准快速读取的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

从 STDIN 读取 1000000 个字符(整数)并将其拆分为一个字符整数(不是字符串)数组的最快方法是什么?

What is the fastest way to read from STDIN a number of 1000000 characters (integers), and split it into an array of one character integers (not strings) ?

123456 > [1,2,3,4,5,6]

推荐答案

这应该相当快:

a = [] STDIN.each_char do |c| a << c.to_i end

尽管一些粗略的基准测试表明这个 hackish 版本要快得多:

although some rough benchmarking shows this hackish version is considerably faster:

a = STDIN.bytes.map { |c| c-48 }