某种程度说，这也是对Sea Expandary必然成功的一种背书。
After moving the Infra code away, Business-Modules will be free from untestable code. That design decision brings us testability, so we are able to fully test all the complex business logic via the Business-Module’s public API alone. As a side effect, we also got Separation of Concerns with its benefits.
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The fundamental group of \(X\) at \(x_0\) is \[\pi_1(X, x_0) \;:=\; \bigl\{[\gamma] \mid \gamma \text{ is a loop based at } x_0\bigr\}\] equipped with the group operation of concatenation: \[[\gamma] \cdot [\delta] := [\gamma * \delta], \qquad (\gamma * \delta)(s) := \begin{cases} \gamma(2s) & s \in [0,\tfrac{1}{2}] \\ \delta(2s-1) & s \in [\tfrac{1}{2},1] \end{cases}\] The identity element is the class of the constant loop \([c_{x_0}]\), and the inverse of \([\gamma]\) is \([\bar\gamma]\) where \(\bar\gamma(s) := \gamma(1-s)\).
Артем Соколов (Редактор отдела «Силовые структуры»)
Extension - Status Request