• Teo (24/24) Jan 05 2020 I couldn't find by searching this forum the way to do that, so I
• JN (6/8) Jan 05 2020 For some reason I can't get run.dlang.io to shorten a link...
• Teo (15/17) Jan 05 2020 Thanks for the input.
• Temtaime (2/18) Jan 05 2020 https://ideone.com/tvpreP
• Teo (2/3) Jan 06 2020 That's cool! Thank you very much!

Teo <x x.com> writes:

I couldn't find by searching this forum the way to do that, so I 
thought it is better to ask and learn.

The data I am trying to unfold is in the form of string array 
read from a file line by line, like this:

string[] lines =
[
"key1: valueA",
"key2: valueB",
"key3: valueC",
"\tvalueD",
"<white space>valueE",
"key4: valueF",
]

where <white space> represents some white space character(s). It 
could be TAB or SPACE, etc.

Now, I want to find a way to concatenate valueD to the previous 
element which begins with key3 and afterwards concatenate valueE 
also to the concatenated string for key3.

The rule is that long strings are folded when written to the file 
and folded lines always begin with a white space.

Finally I am going to use assocArray to construct an associative 
array.

All advises are welcome
Thank you!

JN <666total wp.pl> writes:

On Sunday, 5 January 2020 at 08:21:54 UTC, Teo wrote:
 All advises are welcome
 Thank you!

For some reason I can't get run.dlang.io to shorten a link... 
hmm... I'll use ideone.

https://ideone.com/EjbhIs

It's kind of a naive implementation, there probably is room for 
improvement but should work for start.

Teo <x x.com> writes:

On Sunday, 5 January 2020 at 13:37:58 UTC, JN wrote:
 It's kind of a naive implementation, there probably is room for 
 improvement but should work for start.

Thanks for the input.
I just realized that I was not precise enough in my description. 
Apologies for that.
My intention is to use std.algorithm, if possible.

I read the documentation and tried using many functions like 
"joiner", "each", "fold", "group", "filter", etc. from 
std.algorithm.iteration.

In my opinion, I need to construct a predicate like
(a, b) => if b.startsWith(<white space>) {join(a, b, " ")}
Unfortunately, I cannot figure out which combination of functions 
will give me the desired result.

Of course, if I am unable to find an elegant way to do it, I am 
going to iterate over the array in a way similar to what you 
suggested.

Temtaime <temtaime gmail.com> writes:

On Sunday, 5 January 2020 at 22:39:37 UTC, Teo wrote:
 On Sunday, 5 January 2020 at 13:37:58 UTC, JN wrote:
 [...]

 Thanks for the input.
 I just realized that I was not precise enough in my 
 description. Apologies for that.
 My intention is to use std.algorithm, if possible.

 I read the documentation and tried using many functions like 
 "joiner", "each", "fold", "group", "filter", etc. from 
 std.algorithm.iteration.

 In my opinion, I need to construct a predicate like
 (a, b) => if b.startsWith(<white space>) {join(a, b, " ")}
 Unfortunately, I cannot figure out which combination of 
 functions will give me the desired result.

 Of course, if I am unable to find an elegant way to do it, I am 
 going to iterate over the array in a way similar to what you 
 suggested.

https://ideone.com/tvpreP

Teo <x x.com> writes:

On Monday, 6 January 2020 at 00:03:06 UTC, Temtaime wrote:
 https://ideone.com/tvpreP

That's cool! Thank you very much!