使用 libusb 的未定义方法 all_input_usages [英] Undefined method all_input_usages using libusb

问题描述

我用 libusb 编写了这个小演示代码:

I wrote this little demo code with libusb:

require 'libusb'

usb = LIBUSB::Context.new
device = usb.devices(:idVendor => 2362).first
puts device.all_input_usages

但不知何故我没有收到错误:

But somehow I don't get the error:

 undefined method `all_input_usages' for #<LIBUSB::Device:0x2091fa8>

我做错了什么?

推荐答案

你应该远离那个演示代码，因为它已经过时了，而且 API 已经发生了根本性的变化.

You should step away from that demo code, because it is hopelessly outdated and the API has radically changed since.

当您键入 device.methods - Object.new.methods 时，您可以在 IRB 中看到所有可用的方法，这是我在想探索对象必须提供的内容时经常使用的技巧.也许这会帮助你找到你正在寻找的方法.

You can see all available methods in IRB when you type device.methods - Object.new.methods, it's a trick i often use when i want to explore what an object has to offer. Maybe this will help you find the method you are looking for.

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