float price; if (price == float.nan) { // initialized } else { // uninitialized } ... valid ?

[Mathias LANG]

On Wednesday, 30 June 2021 at 04:03:24 UTC, someone wrote:
> On Wednesday, 30 June 2021 at 03:51:47 UTC, Mathias LANG wrote:
>
> ... is far from pretty but it works as expected, thanks for 
> your tip !

Can be made a bit prettier with UFCS:

> ```d
> import std.math : isNaN;
>
> float lnumStockPricePreceding;
>
> foreach (float lnumStockPrice; ludtStockPriceEvolution.range)
>
>    if (!lnumStockPricePreceding.isNan) {
>
>       /// do something
>
>    }
>
>    lnumStockPricePreceding = lnumStockPrice;
>
> }
> ```

Or even better, with ranges:
> ```d
> import std.math : isNaN;
>
> float lnumStockPricePreceding;
>
> foreach (float lnumStockPrice; 
> ludtStockPriceEvolution.range.filter!(f => !f.isNan))
>       /// do something
>
>    lnumStockPricePreceding = lnumStockPrice;
>
> }
> ```