https://probablydance.com/2016/02/27/functional-programming-is-not-popular-because-it-is-weird/
Буквально именно так и ощущаю себя когда программирую на функциональном языке:
Writing functional code is often backwards and can feel more like
solving puzzles than like explaining a process to the computer. In
functional languages I often know what I want to say, but it feels
like I have to solve a puzzle in order to express it to the
language.
Ну и отличные примеры того, как испечь императивный пирог:
1. Preheat oven to 175 degrees C. Grease and flour 2 – 8 inch round
pans. In a small bowl, whisk together flour, baking soda and salt;
set aside.
2. In a large bowl, cream butter, white sugar and brown sugar until
light and fluffy. Beat in eggs, one at a time. Mix in the bananas.
Add flour mixture alternately with the buttermilk to the creamed
mixture. Stir in chopped walnuts. Pour batter into the prepared
pans.
3. Bake in the preheated oven for 30 minutes. Remove from oven, and
place on a damp tea towel to cool.
и функциональный:
1. A cake is a hot cake that has been cooled on a damp tea towel,
where a hot cake is a prepared cake that has been baked in a
preheated oven for 30 minutes.
2. A preheated oven is an oven that has been heated to 175 degrees C.
3. A prepared cake is batter that has been poured into prepared
pans, where batter is mixture that has chopped walnuts stirred in.
Where mixture is butter, white sugar and brown sugar that has been
creamed in a large bowl until light and fluffy…
Именно вот про это я и говорю что для функциональщины нужно по другому
мыслить. Не как yet another ordinary human, а как математик с абстракциями.