How can I extend

string line = "car    wash";

line.strip.splitter!isWhite.joiner("_").to!string

so that

car   wash

becomes

car_wash

and not

car___wash

?

Used at https://github.com/nordlow/justd/blob/master/knet.d#L1142

On Monday, 20 October 2014 at 20:27:19 UTC, Nordlöw wrote:
> line.strip.splitter!isWhite.joiner("_").to!string

Doh, that was too easy:

line.strip.splitter!isWhite.filter!(a => !a.empty).joiner(lineSeparator).to!S;

Sorry, for being lazy ;)

Nordlöw:

> How can I extend
>
> string line = "car    wash";
>
> line.strip.splitter!isWhite.joiner("_").to!string
>
> so that
>
> car   wash
>
> becomes
>
> car_wash
>
> and not
>
> car___wash
>
> ?

Use std.string.tr.

Bye,
bearophile

On Mon, 20 Oct 2014 22:21:09 +0000, bearophile wrote:

> Use std.string.tr.
> 
> Bye,
> bearophile

std.string.squeeze might be more appropriate.

Justin Whear:

> std.string.squeeze might be more appropriate.

But with tr you can also replace the spaces with the underscore.

Bye,
bearophile

On Monday, 20 October 2014 at 23:25:18 UTC, bearophile wrote:
> But with tr you can also replace the spaces with the underscore.

std.string.tr is my preferred choice here :)

Thanks!

On Tuesday, 21 October 2014 at 07:31:59 UTC, Nordlöw wrote:
> std.string.tr is my preferred choice here :)

It would be nice to have a lambda-variant of std.string.tr to call like

x.tr!isWhite(['_'])

Nordlöw:

> It would be nice to have a lambda-variant of std.string.tr to call like
>
> x.tr!isWhite(['_'])

If your text is ASCII, then there is std.ascii.whitespace that can be given as argument to std.string.tr.

Bye,
bearophile

On Tuesday, 21 October 2014 at 08:04:13 UTC, bearophile wrote:
> If your text is ASCII, then there is std.ascii.whitespace that can be given as argument to std.string.tr.
>
> Bye,
> bearophile

http://dlang.org/phobos/std_ascii.html#.whitespace

is of string but

std.string.tr needs [string] as argument.

How does that work?

On Wednesday, 22 October 2014 at 19:00:36 UTC, Nordlöw wrote:
> On Tuesday, 21 October 2014 at 08:04:13 UTC, bearophile wrote:
>> If your text is ASCII, then there is std.ascii.whitespace that can be given as argument to std.string.tr.
>>
>> Bye,
>> bearophile
>
> http://dlang.org/phobos/std_ascii.html#.whitespace
>
> is of string but
>
> std.string.tr needs [string] as argument.
>
> How does that work?

string a = "test \t \t test";

writeln(a.tr(std.ascii.whitespace,"_","s"));