[REBOL] Re: Sort by first part of line
From: rotenca:telvia:it at: 6-Sep-2002 14:48
Hi,
> >I think that he can parse the string building a sortable block and then
rejoin
> >the data in a string.
>
> Would you please give an example?
My idea is like Anton's one. Andrew came with an interesting idea, but how
fast?
If the whole line had a fixed lenght, we could use another method, more fast,
here i presume lines are of different lengths.
Here i assume that numbers strings are right aligned and of fixed lengths and
separators are spaces (not tabs) to be a little more fast.
REBOL []
probe r: 10000 ;10000 lines
string: make string! 2000000
string: head insert/dup tail ""
{ 454 en tw
12395 en th
313 kai o
175 oi de asdf
313 eij thn
174 eij ton
124 kai ouk dffd fder
4123 kai thn
219 ek tou
160 kai en tty ttq qzfcv
} r / 10
blk: make block! 2 * r ; 2 * number of lines in the string
s2: has [num rest] [
clear blk
parse/all string [
some [
copy num [any " " to " "]
copy rest thru newline
(insert insert tail blk num rest)
]
]
to string! sort/skip blk 2
]
probe s2
---
Ciao
Romano
