为什么 irb 将控制字符插入到我的反向交互搜索缓冲区中？
如果我在 irb 中进行反向交互式搜索，然后输入控制字符（箭头键是我实际上见过的唯一的）。所以我从这个会话开始：
$ irb
>> print "hello"
hello
然后输入 ^r, h
$ irb
>> print "hello"
hello
(reverse-i-search)`he': print "hello"
到目前为止一切顺利。然后我点击向左箭头，最终得到以下结果：
$ irb
>> print "hello"
hello
>> print "[Dhello"
随后使用箭头将正常移动光标。
If I do a reverse interactive search in irb and then enter a control character (arrow keys are the only ones I've seen this with actually). So I start with this session:
$ irb
>> print "hello"
hello
then enter ^r, h
$ irb
>> print "hello"
hello
(reverse-i-search)`he': print "hello"
So far so good. Then I hit the left arrow, and I end up with this:
$ irb
>> print "hello"
hello
>> print "[Dhello"
Subsequent use of the arrows moves the cursor around normally.
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这不会解决您的问题，但至少我可以回答您提出的问题（原因）：
左箭头以三个字符 ESC、[ 和 D 的形式输入终端。（您可以通过键入 < 来测试这一点） code>read 并按向左箭头，这会显示
^[[D，其中^[是转义字符的呈现方式。）不知何故
irb在不应该的情况下拾取了 ESC 字符；因此 ESC 结束历史搜索，并且[D按字面意思输入。查看使用 readline 的其他程序，Bash 和 Python 的行为正确，但是ledit（是的，晦涩难懂 - 抱歉 ^^）也遇到了这个问题。除非有人知道这个问题的解决方案，否则我能想到的唯一解决方法是按 ESC 而不是箭头键退出历史搜索。当然，如果您不需要进一步编辑，也可以按 Enter 键。
This won't solve your problem, but at least I can answer the question you asked (the Why):
The left arrow gets entered into the terminal as three characters, ESC, [, and D. (You can test this by typing
readand pressing the left arrow, which displays^[[D, where^[is how the escape character gets rendered.)Somehow
irbpicks up the ESC character when it shouldn't; so ESC ends the history search, and[Dgets entered literally. Looking at other programs using readline, Bash and Python behave correctly, butledit(yeah, obscure -- sorry ^^) is having this problem as well.Unless someone knows a solution for this, the only workaround I can think of is pressing ESC instead of an arrow key to exit history search. Or hitting enter if you don't need to edit further, of course.
您是否启用了 vi 编辑模式？
我通过
set editor-mode vi在我的$HOME/.inputrc文件中打开了它。禁用它“修复”了我的箭头键。正如 @JoLiss 提到的，其他 readline 程序（bash 等）也可以正常工作；所以 AFAICT，这是一个 Ruby 问题。请参阅：http://bugs.ruby-lang.org/issues/7859#change -36333
Do you have vi editing mode enabled?
I had it turned on in my
$HOME/.inputrcfile viaset editing-mode vi. Disabling it "fixed" my arrow-keys.As mentioned by @JoLiss, other readline programs (bash, etc.) were also working correctly; so AFAICT, it's a Ruby problem. See: http://bugs.ruby-lang.org/issues/7859#change-36333