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* How to test if the current line contains only white-spache?
@ 2015-11-14 16:11 Rolf Ade
  2015-11-14 18:42 ` Barry Margolin
                   ` (4 more replies)
  0 siblings, 5 replies; 40+ messages in thread
From: Rolf Ade @ 2015-11-14 16:11 UTC (permalink / raw)
  To: help-gnu-emacs


For some random minor elisp code I need to know, if the current line
contains only white-space characters[1].

I came up with this somewhat convoluted code:

(beginning-of-line)
(skip-chars-forward " \t")
(let ((text-start (current-column)))
  (end-of-line)
  (if (= text-start (current-column))
      t
    nil)

(and that is, obviously, without saving point position and wrapping
into and a defun and maybe other bells and whistles).

I wonder, what much simpler and more elegant solution I'm missing.

rolf


[1] "White-space characters" in this sense atm defines to just " " and
"\t". Lets accept that for the context of the question, I know there are
other definitions of white-space characters.



^ permalink raw reply	[flat|nested] 40+ messages in thread

end of thread, other threads:[~2015-11-27 19:52 UTC | newest]

Thread overview: 40+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2015-11-14 16:11 How to test if the current line contains only white-spache? Rolf Ade
2015-11-14 18:42 ` Barry Margolin
2015-11-15 13:29   ` Marcin Borkowski
2015-11-16 21:15     ` Philipp Stephani
2015-11-25 13:58     ` looking-at-p slower than looking-at Nicolas Richard
2015-11-25 20:34       ` Marcin Borkowski
2015-11-25 21:28         ` Michael Heerdegen
2015-11-25 21:32           ` Marcin Borkowski
2015-11-26 13:37         ` Nicolas Richard
2015-11-25 22:39       ` Emanuel Berg
2015-11-26 13:58         ` Nicolas Richard
     [not found]     ` <mailman.675.1448463102.31583.help-gnu-emacs@gnu.org>
2015-11-25 15:48       ` Barry Margolin
2015-11-25 20:39         ` Marcin Borkowski
2015-11-15 19:18   ` How to test if the current line contains only white-spache? Rolf Ade
2015-11-17  0:26     ` Emanuel Berg
2015-11-17 20:38       ` Marcin Borkowski
     [not found]     ` <mailman.23.1447720376.31583.help-gnu-emacs@gnu.org>
2015-11-19  1:56       ` Rolf Ade
2015-11-19  2:05         ` Stefan Monnier
2015-11-19  2:18           ` Emanuel Berg
2015-11-19  2:23         ` Emanuel Berg
     [not found]         ` <mailman.202.1447899839.31583.help-gnu-emacs@gnu.org>
2015-11-19 13:54           ` Rolf Ade
2015-11-19 15:20             ` Marcin Borkowski
2015-11-19 23:58               ` Emanuel Berg
2015-11-20  6:14                 ` Marcin Borkowski
2015-11-21  2:26                   ` Emanuel Berg
     [not found]               ` <mailman.279.1447976946.31583.help-gnu-emacs@gnu.org>
2015-11-20  0:48                 ` How to test if the current line contains only white-space? Rolf Ade
2015-11-21  2:02                   ` Emanuel Berg
     [not found]                   ` <mailman.375.1448070734.31583.help-gnu-emacs@gnu.org>
2015-11-21  2:28                     ` Rolf Ade
2015-11-24  3:01                       ` Emanuel Berg
2015-11-20  0:48                 ` Rolf Ade
2015-11-26 17:51         ` How to test if the current line contains only white-spache? Alex Bennée
2015-11-26 23:59           ` predicates (was: Re: How to test if the current line contains only white-spache?) Emanuel Berg
     [not found]           ` <mailman.787.1448581762.31583.help-gnu-emacs@gnu.org>
2015-11-27  4:28             ` predicates Pascal J. Bourguignon
2015-11-27 19:52               ` predicates Emanuel Berg
2015-11-15  5:56 ` How to test if the current line contains only white-spache? Yuri Khan
2015-11-15  9:18 ` John Mastro
2015-11-25 14:04 ` Nicolas Richard
2015-11-25 20:36   ` Marcin Borkowski
2015-11-25 22:41   ` Emanuel Berg
     [not found] ` <mailman.676.1448463105.31583.help-gnu-emacs@gnu.org>
2015-11-26 15:24   ` Rolf Ade

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