• michaelbi (30/30) Jan 19 2022 input:
• Stanislav Blinov (2/5) Jan 19 2022 ...because there's an empty line at the end of input.txt?
• michaelbi (4/9) Jan 19 2022 i got it, though i still don't know where the [] come from. i
• jfondren (7/8) Jan 19 2022 $ rdmd --eval 'writeln("".array.strip.sort.group.assocArray)'
• =?UTF-8?Q?Ali_=c3=87ehreli?= (8/20) Jan 19 2022 Works for me on Linux. Perhaps there is an issue with Windows line endin...
• MichaelBi (4/26) Jan 19 2022 I am using windows.

michaelbi <shunjie.bi gmail.com> writes:

input:
00100
11110
10110
10111
10101
01111
00111
11100
10000
11001
00010
01010

     code:
     void main()
     {
     	foreach(line; 
File("input.txt").byLine.map!(a=>a.idup).array.transposed){
     		auto sortgroup = line.array.strip.sort.group.assocArray;	
     		writeln(sortgroup);
     	}
     }

output:
['1':7, '0':5]
['1':5, '0':7]
['1':8, '0':4]
['1':7, '0':5]
['1':5, '0':7]
[]

so why there is a [] at the end of assocArray printed? thanks.

Stanislav Blinov <stanislav.blinov gmail.com> writes:

On Wednesday, 19 January 2022 at 13:15:35 UTC, michaelbi wrote:

     	foreach(line; > 
 File("input.txt").byLine.map!(a=>a.idup).array.transposed)

 so why there is a [] at the end of assocArray printed? thanks.

...because there's an empty line at the end of input.txt?

michaelbi <shunjie.bi gmail.com> writes:

On Wednesday, 19 January 2022 at 13:21:32 UTC, Stanislav Blinov 
wrote:
 On Wednesday, 19 January 2022 at 13:15:35 UTC, michaelbi wrote:

     	foreach(line; > 
 File("input.txt").byLine.map!(a=>a.idup).array.transposed)

 so why there is a [] at the end of assocArray printed? thanks.

 ...because there's an empty line at the end of input.txt?

i got it, though i still don't know where the [] come from. i 
just add strip here: a=>a.idup.strip

jfondren <julian.fondren gmail.com> writes:

On Wednesday, 19 January 2022 at 14:06:45 UTC, michaelbi wrote:
 i got it, though i still don't know where the [] come from.

$ rdmd --eval 'writeln("".array.strip.sort.group.assocArray)'
[]
$ rdmd --eval 
'writeln(typeid("".array.strip.sort.group.assocArray))'
uint[dchar]

It's what an empty AA looks like.

=?UTF-8?Q?Ali_=c3=87ehreli?= <acehreli yahoo.com> writes:

On 1/19/22 06:06, michaelbi wrote:
 On Wednesday, 19 January 2022 at 13:21:32 UTC, Stanislav Blinov wrote:
 On Wednesday, 19 January 2022 at 13:15:35 UTC, michaelbi wrote:

         foreach(line; > 
 File("input.txt").byLine.map!(a=>a.idup).array.transposed)

 so why there is a [] at the end of assocArray printed? thanks.

 ...because there's an empty line at the end of input.txt?

 
 i got it, though i still don't know where the [] come from. i just add 
 strip here: a=>a.idup.strip

Works for me on Linux. Perhaps there is an issue with Windows line endings?

In any case, the .strip above would not be eliminating empty lines; you 
need to filter them out e.g. with

   byLine.filter!(line => !line.empty)

Aside: Instead of copying the lines with .idup explicitly, there is 
.byLineCopy that already does that.

Ali

MichaelBi <shunjie.bi gmail.com> writes:

On Wednesday, 19 January 2022 at 16:36:36 UTC, Ali Çehreli wrote:
 On 1/19/22 06:06, michaelbi wrote:
 On Wednesday, 19 January 2022 at 13:21:32 UTC, Stanislav 
 Blinov wrote:
 On Wednesday, 19 January 2022 at 13:15:35 UTC, michaelbi 
 wrote:

 [...]

 [...]

 ...because there's an empty line at the end of input.txt?

 
 i got it, though i still don't know where the [] come from. i 
 just add strip here: a=>a.idup.strip

 Works for me on Linux. Perhaps there is an issue with Windows 
 line endings?

 In any case, the .strip above would not be eliminating empty 
 lines; you need to filter them out e.g. with

   byLine.filter!(line => !line.empty)

 Aside: Instead of copying the lines with .idup explicitly, 
 there is .byLineCopy that already does that.

 Ali

I am using windows.
Thanks a lot for introducing those funcs. Now I am feeling the 
D’s quite interesting and powerful :)