Typescript Array.map 後的型別推論技巧 — Type Predicates

Originally post here => https://jimytc.com/posts/2021/03/27/qnote_on_using_type_predicates/

在集合或陣列類型的資料處理中,偶爾會遇到需要使用 Array.map 把所需要的資料從物件中轉化成另一個陣列物件。 例如

class Foo {
bar?: number

Test Cases Like How We Speak

Originally post HERE

In my current software development work, we’ve talked about TDD within the team but we haven’t really apply this process for couple reasons. But we do care about the products we shipped. So we all committed to the principle which is…

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