Hi,

I want to read two fields from STDIN

    string key;
    double value;
    line_st.formattedRead!"%s %f"(key, value);

However, if the input line contains \t and it doesn't contain any space, the code doesn't work as expected. If there is a space, it works well

   a[space]1         # work, key => a, value => 1
   b[space][tab]2    # work, key => b, value => 2
   c[tab]3           # not work, key => c[tab]3, value => nan

Can you please help? Thanks a lot.


PS: My program is found here

https://github.com/icy/dusybox/blob/master/src/plotbar/main.d#L59

On Tuesday, 19 September 2017 at 13:28:22 UTC, Ky-Anh Huynh wrote:
> Hi,
>
> I want to read two fields from STDIN
>
>     string key;
>     double value;
>     line_st.formattedRead!"%s %f"(key, value);

Well it's so different from C. I would use this:

---
auto t = line_st.split.join (' ');
t.formattedRead!"%s %f"(key, value);
---

On Tuesday, 19 September 2017 at 20:04:36 UTC, kdevel wrote:
> On Tuesday, 19 September 2017 at 13:28:22 UTC, Ky-Anh Huynh wrote:
>> Hi,
>>
>> I want to read two fields from STDIN
>>
>>     string key;
>>     double value;
>>     line_st.formattedRead!"%s %f"(key, value);
>
> Well it's so different from C. I would use this:
>
> ---
> auto t = line_st.split.join (' ');
> t.formattedRead!"%s %f"(key, value);
> ---

Yes it's possible.

It's a little weird and it seems the "feature" (or bug) is not documented on https://dlang.org/phobos/std_format.html. Why a tab (`\t`) isn't considered as a space?