Paweł Matejko 4446e74338 Hexagonal pattern fixes (#814)
* Fixed wrong else condition

* Simplified creating Set of numbers

* Deleted unused imports

* Replaced 'for' loop with 'foreach' one

* Replaced explicit type with diamond

* Removed unnecesary brackets from lambda

* Removed unnecesary contains check before adding element to Set

* Fixed typo and changed non-english constant names
2018-10-27 16:39:16 +05:30
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