A JavaScript development environment for Emacs
https://indium.readthedocs.io
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44 lines
1.6 KiB
44 lines
1.6 KiB
;;; indium-seq-fix.el --- Patches for seq.el -*- lexical-binding: t; -*-
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;; Copyright (C) 2017-2018 Nicolas Petton
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;; Author: Nicolas Petton <nicolas@petton.fr>
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;; Keywords:
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;
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;;; Code:
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;; HACK: In Emacs 25.1, an older version of seq.el is provided, which can be
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;; loaded before indium or even package.el. If this happens, the feature `seq'
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;; being already provided, the correct version of seq.el won't get loaded.
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(require 'seq)
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(unless (fboundp 'seq-map-indexed)
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(defun seq-map-indexed (function sequence)
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"Return the result of applying FUNCTION to each element of SEQUENCE.
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Unlike `seq-map', FUNCTION takes two arguments: the element of
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the sequence, and its index within the sequence."
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(let ((index 0))
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(seq-map (lambda (elt)
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(prog1
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(funcall function elt index)
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(setq index (1+ index))))
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sequence))))
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(provide 'indium-seq-fix)
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;;; indium-seq-fix.el ends here
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