问题描述
我对 Ruby 比较陌生，今天我编写了一个应用程序，您可以通过 ARGV 将参数传递给它.但是在我的应用程序中，我希望能够使用gets".问题是，每次我尝试这样做时，都会出错.
I'm rather new to Ruby, and today I wrote an application which you can pass arguments to via ARGV. But inside my application, I want to be able to use "gets". Problem is, every time I try to do so, I get an error.
这是一个简单的脚本，显示了我的问题:
Here's a simple script which shows my problem:
print "Say something! "
input = gets
如果我这样称呼它:
$ ruby script.rb this is arguments
我收到此错误:
script.rb:2:in `gets': No such file or directory - this (Errno::ENOENT)
from script.rb:2
希望有人能帮我解决这个问题，这样我就可以继续我的 Ruby 之旅了.:)
Hope someone is able to help me solve this, so I can continue my Ruby journey. :)
我知道Gets"不会检索传递给文件的参数.Gets"将查询用户的输入.我希望能够在我的应用程序中使用这两种方法.
I am aware that "Gets" won't retrieve arguments passed to the file. "Gets" will query the user for input. I want to be able to use both these methods inside my application.
推荐答案
如果有参数，默认的 gets 方法会尝试将第一个参数视为文件并从中读取.在这种情况下要从 $stdin 中读取，你必须明确使用它:
If there are arguments, the default gets method tries to treat the first one as a file and read from that. To read from $stdin in such a situation, you have to use it explicitly:
print "Say something! "
input = $stdin.gets
这篇关于Kernel#gets 尝试读取文件而不是标准输入的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！