差異處

這裏顯示兩個版本的差異處。

--- learn:functional-programming [2022/06/21 05:47] – admin_wi1d5ky
+++ learn:functional-programming [2022/06/21 08:21] – [Either] admin_wi1d5ky
@@ 行 1: / 行 1: @@
 # Functional Programming 筆記
 ## Library
-- <https://www.npmjs.com/package/ramda>
+- [Ramda](https://www.npmjs.com/package/ramda)
-- <https://www.npmjs.com/package/ramda-fantasy>
+- [Ramda Fantasy](https://www.npmjs.com/package/ramda-fantasy)
@@ 行 18: / 行 17: @@
 ## Functor
-  * Either
+### Either
-    * 處理錯誤情境
-    * 分成 `Either.Right` 和 `Either.Left`
+  * 處理錯誤情境
-    * `Either.Right` 會繼續跑，而 `Either.Left` 則會忽略後續運算，執意將手上的值傳下去
+  * 分成 `Either.Right` 和 `Either.Left`
-    * <https://ithelp.ithome.com.tw/articles/10279389>
+  * `Either.Right` 會繼續跑，而 `Either.Left` 則會忽略後續運算，執意將手上的值傳下去
-  * Future
+  * <https://ithelp.ithome.com.tw/articles/10279389>
-  * Identity
-  * IO
+```javascript
-    * 處理永不失敗的同步計算
+const addOne = num => Right(R.add(1));
-    * <https://ithelp.ithome.com.tw/articles/10278925>
+const error = () => Left(new Error('error'))
-  * Maybe
-    * 處理無值情境 ( null || undefined )
+Right(10)
-    * <https://ithelp.ithome.com.tw/articles/10277399>
+    .chain(addOne)
-  * Reader
+    .map(R.add(2))
-    * 用來避免中間傳送無用的 `dep`
+    .inspect() // Right(13)
-    * <https://ithelp.ithome.com.tw/articles/10280177>
-  * Tuple
+Right(10)
-  * State
+    .chain(error)
+    .map(R.add(2))
+    .inspect() // Left(Error: error)
+```
+### Future
+> TODO
+### Identity
+> TODO
+### IO
+  * 處理永不失敗的同步計算
+  * <https://ithelp.ithome.com.tw/articles/10278925>
+### Maybe
+  * 處理無值情境 ( null || undefined )
+  * <https://ithelp.ithome.com.tw/articles/10277399>
+### Reader
+  * 用來避免中間傳送無用的 `dep`
+  * <https://ithelp.ithome.com.tw/articles/10280177>
+### Tuple
+> TODO
+### State
     * <https://ithelp.ithome.com.tw/articles/10280554>