Download to read offline
![completion
Readline.completion_proc
Readline.completion_proc =
->(word){%w[word1 word2 ...]}
04 14](https://image.slidesharecdn.com/readline-120722101830-phpapp01/85/completion_proc-and-history-5-320.jpg)
![fat man in readline
puts Readline.
methods(false).
grep(->m{/[=?]$/!~m}).
sort_by(&:size).
reverse
# refs hp12c http://bit.ly/QnKcDS
07 14](https://image.slidesharecdn.com/readline-120722101830-phpapp01/85/completion_proc-and-history-8-320.jpg)
![Array-like object
Readline::HISTORY.class # => Object
Readline::HISTORY.singleton_methods(false) # =>
[:to_s, :[], :[]=, :<<, :push, :pop,
:shift, :each, :length, :size, :empty?,
:delete_at, :clear]
Enumerable === Readline::HISTORY # => true
10 14](https://image.slidesharecdn.com/readline-120722101830-phpapp01/85/completion_proc-and-history-11-320.jpg)
![HISTORY.delete_if
require "readline"
class << Readline::HISTORY
def delete_if(&block)
return enum_for(__method__) unless block
raise SecurityError if $SAFE == 4
i = 0
while (size > i) do
break unless entry = self[i]
if block.call(entry)
delete_at(i)
else
i += 1
end
end
return self
end
end
12 14](https://image.slidesharecdn.com/readline-120722101830-phpapp01/85/completion_proc-and-history-13-320.jpg)
Uploaded byNobuhiro IMAI
completion_proc and history
This document discusses adding completion and editing features to the Readline library in Ruby. It demonstrates how to enable line editing, browsing command history, and tab completion. It also shows how to customize the completion suggestions and delete entries from the command history. The document provides code examples for setting a completion block and deleting entries from the history that match a given block. It encourages questions at the end.
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completion_proc and history
- 1. completion_proc no6v (Nobuhiro IMAI) RubyKansai Sat, 21 Jul 2012
- 2. require "readline" line edit (←→) history (↑↓) completion (Tab) 01 14
- 3. line edit Readline.readline("⚡ ") ⚡ ←→ 02 14
- 4. history Readline.readline("⚡ ", true) ⚡ Readline::HISTORY.clear ⚡ Readline::HISTORY << "a" ⚡ Readline::HISTORY << "b" ⚡ ↑↓ 03 14
- 5. completion Readline.completion_proc Readline.completion_proc = ->(word){%w[word1 word2 ...]} 04 14
- 6.
- 7. memo of demo github.com/jugyo/earthquake github.com/no6v/ rubykansai55/blob/master/ completion_proc.rb 06 14
- 8. fat man inreadline puts Readline. methods(false). grep(->m{/[=?]$/!~m}). sort_by(&:size). reverse # refs hp12c http://bit.ly/QnKcDS 07 14
- 9.
- 10.
- 11. Array-like object Readline::HISTORY.class # => Object Readline::HISTORY.singleton_methods(false) # => [:to_s, :[], :[]=, :<<, :push, :pop, :shift, :each, :length, :size, :empty?, :delete_at, :clear] Enumerable === Readline::HISTORY # => true 10 14
- 12. but, somethings lack... unshift(*obj) last first(n)/last(n) delete_if{|x| ... } 11 14
- 13. HISTORY.delete_if require "readline" class << Readline::HISTORY def delete_if(&block) return enum_for(__method__) unless block raise SecurityError if $SAFE == 4 i = 0 while (size > i) do break unless entry = self[i] if block.call(entry) delete_at(i) else i += 1 end end return self end end 12 14
- 14. hist_delete_if static VALUE hist_delete_if(VALUE self) { HIST_ENTRY *entry; int i = 0; RETURN_ENUMERATOR(self, 0, 0); rb_secure(4); while (history_length > i) { entry = history_get(history_get_offset_func(i)); if (entry == NULL) break; if (RTEST(rb_yield(rb_locale_str_new_cstr(entry->line)))) rb_remove_history(i); else i++; } return self; } 13 14
- 15.