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红宝石如何在剪切和粘贴的用户输入中忽略换行符?

highline ruby

2

srboisvert · 技术社区 · 17 年前

我编写了一个小Ruby脚本,需要一些用户输入。我预计,在数据输入过程中,用户可能会有点懒惰,因为在数据输入过程中需要较长的条目,他们可能会从另一个包含换行符的文档中剪切和粘贴。

Highline 我很喜欢它。我怀疑我只是在文档中遗漏了一些东西,但是有没有办法获得可变长度的多行输入?

编辑:问题是换行符终止输入,换行符后的字符作为下一个问题的输入。

2 回复 | 直到 17 年前

1

5

rampion 17 年前

以下是作者在示例中使用的内容:(来自highline-1.5.0/examples)

#!/usr/local/bin/ruby -w

# asking_for_arrays.rb
#
#  Created by James Edward Gray II on 2005-07-05.
#  Copyright 2005 Gray Productions. All rights reserved.

require "rubygems"
require "highline/import"
require "pp"

grades = ask( "Enter test scores (or a blank line to quit):",
              lambda { |ans| ans =~ /^-?\d+$/ ? Integer(ans) : ans} ) do |q|
  q.gather = ""
end

say("Grades:")
pp grades

关于 HighLine::Question#gather (摘自highline-1.5.0/lib/highline/question.rb)

# When set, the user will be prompted for multiple answers which will
# be collected into an Array or Hash and returned as the final answer.
#
# You can set _gather_ to an Integer to have an Array of exactly that
# many answers collected, or a String/Regexp to match an end input which
# will not be returned in the Array.
#
# Optionally _gather_ can be set to a Hash.  In this case, the question
# will be asked once for each key and the answers will be returned in a
# Hash, mapped by key.  The <tt>@key</tt> variable is set before each
# question is evaluated, so you can use it in your question.
#
attr_accessor :gather

这些似乎是你在图书馆的主要选择。还有别的事,你得自己做。

2

0

wombleton 17 年前

这不是像:

input.gsub!('\r\n', '')