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1
It's now 2020 and you can open neotree in the current directory using neotree-show instead of neotree-toggle.
neotree-show does exactly what the orignal op required, without the need for the elaborate function.
0
Quoth (emacs) Completion Options, the paragraph just before completion-ignored-extensions is described:
When completing file names, case differences are ignored if the
variable ‘read-file-name-completion-ignore-case’ is non-‘nil’. The
default value is ‘nil’ on systems that have case-sensitive file-names,
such as GNU/Linux; it is non-‘nil’ on systems ...
2
You're still going need to read the entire file, but you don't have to process
every line, since you need just first N lines.
(defun your-read-lines (file n)
"Return first N lines of FILE."
(with-temp-buffer
(insert-file-contents-literally file)
(cl-loop repeat n
unless (eobp)
collect (prog1 (buffer-substring-no-...
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