[9fans] Sam: Is This a Bug?

[9fans] Sam: Is This a Bug?

[kalterdev]

[-- Attachment #1: Type: text/plain, Size: 754 bytes --]

Consider the following sample text:

foo
bar
baz
qux
quux

The purpose is to merge each pair of words, so that the text becomes:

foobar
bazqux
quux

The following command works fine:

x/.+\n.+/ x/\n/ d

But the following one does not:

x/.*\n.*/ x/\n/ d

It results in all \n being deleted.

I suppose it's because .* matches an empty string in this case. But
it really shouldn't. Sam's regular expressions are leftmost-longest.
And there's seemingly nothing that must stop both .* from extending.

------------------------------------------
9fans: 9fans
Permalink: https://9fans.topicbox.com/groups/9fans/Tabb641f45805a1fc-M3a459815536caaee8e5401c5
Delivery options: https://9fans.topicbox.com/groups/9fans/subscription

[-- Attachment #2: Type: text/html, Size: 1669 bytes --]

Re: [9fans] Sam: Is This a Bug?

[umbraticus]

try this and it should make sense:

x/.+\n.*/ x/\n/ d

with .* to the left of the \n you get the following:

match foo\nbar and delete the \n
match \nbaz and delete the \n
match \nqux and delete the \n
match \nquux and delete the \n
match \n and delete it

umbraticus

------------------------------------------
9fans: 9fans
Permalink: https://9fans.topicbox.com/groups/9fans/Tabb641f45805a1fc-M08971bc7fde7e72e022b08e3
Delivery options: https://9fans.topicbox.com/groups/9fans/subscription

Re: [9fans] Sam: Is This a Bug?

[kalterdev]

[-- Attachment #1: Type: text/plain, Size: 249 bytes --]

Now I see. Thank you.
------------------------------------------
9fans: 9fans
Permalink: https://9fans.topicbox.com/groups/9fans/Tabb641f45805a1fc-M5d177572b05eceebe0335e0a
Delivery options: https://9fans.topicbox.com/groups/9fans/subscription

[-- Attachment #2: Type: text/html, Size: 737 bytes --]