* #transform} methods all return {@link Double#NaN}. The {@link #inverse} method returns the same
   * instance.
   */
  public static LinearTransformation forNaN() {
    return NaNLinearTransformation.INSTANCE;
  }

  /** Returns whether this is a vertical transformation. */
  public abstract boolean isVertical();

* 🌐 Update Korean translation for `docs/ko/docs/help-fastapi.md`. PR [#13262](https://github.com/fastapi/fastapi/pull/13262) by [@Zerohertz](https://github.com/Zerohertz).
* 🌐 Add Korean translation for `docs/ko/docs/advanced/custom-response.md`. PR [#13265](https://github.com/fastapi/fastapi/pull/13265) by [@11kkw](https://github.com/11kkw).

   *
   * <p>If the dataset contains any non-finite values ({@link Double#POSITIVE_INFINITY}, {@link
   * Double#NEGATIVE_INFINITY}, or {@link Double#NaN}) then the result is {@link
   * LinearTransformation#forNaN()}.
   *
   * @throws IllegalStateException if the dataset is empty or contains a single pair of values, or
   *     both the {@code x} and {@code y} dataset must have zero population variance
   */

- [Español (Spanish)](docs/es/README.md)
- [Português (Brazilian Portuguese)](docs/pt-BR/README.md)
- [Français (French)](docs/fr/README.md)
- [Deutsch (German)](docs/de/README.md)
- [한국어 (Korean)](docs/ko/README.md)

## Powered By

* [Lasta Di](https://github.com/lastaflute/lasta-di "Lasta Di"): DI Container
* [LastaFlute](https://github.com/lastaflute/lastaflute "LastaFlute"): Web Framework

* Hozzá tartozik kettő interaktív dokumentációs web felület.

---

Eddig csak a felszínt kapargattuk, de a lényeg hogy most már könnyebben érthető hogyan működik.

Próbáld kicserélni a következő sorban:

```Python
    return {"item_name": item.name, "item_id": item_id}
```

...ezt:

```Python
        ... "item_name": item.name ...
```

...erre:

```Python

Marques, Philipp Hack, Phillip Cloud, Piergiacomo De Marchi, Prashant Kumar,
puneeshkhanna, pvarouktsis, QQ喵, Rajeshwar Reddy T, Rama Ketineni, Reza Rahimi,
Robert Kalmar, rsun, Ryan Kuester, Saduf2019, Sean Morgan, Sean Moriarity,
Shaochen Shi, Sheng, Yang, Shu Wang, Shuai Zhang, Soojeong, Stanley-Nod, Steven
I Reeves, stevenireeves, Suraj Sudhir, Sven Mayer, Tamas Bela Feher,

spv,,orue,?midalv,?s&ar,itym,?t&en,ni,?u&4an,de,?vo&g,n,?ynzorg,zakvakidalv,?myc?p?ug??s!.&a&d&golov,nagarak,?gulak,i&groeg,kymlak,lerak,nemra,rikhsab,ssakahk,vodrom,zahkba,?lut,rahkub,vut,yegyda,znep,?bps,da&baghsa,rgonilest,?gunel,i&anatsuk,hcos,ovan,ttailgot,?k&alhsygnam,ihclan,s&legnahkra,m,n&a&mrum,yrb,?i&buytka,nbo,??tiort,vorkop,??l&ocarak,ybmaj,?na&gruk,jiabreza,ts&egad,hkazak-&htron,tsae,???ovonavi,r&adonsark,imidalv,?t&enxe,nek&hsat,mihc,??vo&hsalab,n,?ynzorg,z&akvakidalv,emret,??t&amo...