vault backup: 2022-09-30 21:13:03

Affected files:
.obsidian/workspace
03. Programming/Kotlin/class.md
03. Programming/Kotlin/run, let, with, also 和 apply.md

.obsidian/workspace

@@ -9,7 +9,7 @@
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           "type": "markdown",
           "state": {
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+            "file": "03. Programming/Kotlin/run, let, with, also 和 apply.md",
             "mode": "source",
             "source": true
           }
@@ -69,7 +69,7 @@
             "state": {
               "type": "backlink",
               "state": {
-                "file": "03. Programming/Kotlin/class.md",
+                "file": "03. Programming/Kotlin/run, let, with, also 和 apply.md",
                 "collapseAll": false,
                 "extraContext": false,
                 "sortOrder": "alphabetical",
@@ -86,7 +86,7 @@
             "state": {
               "type": "outline",
               "state": {
-                "file": "03. Programming/Kotlin/class.md"
+                "file": "03. Programming/Kotlin/run, let, with, also 和 apply.md"
               }
             }
           }
@@ -116,6 +116,7 @@
   },
   "active": "828beb43bb437dd1",
   "lastOpenFiles": [
+    "03. Programming/Kotlin/class.md",
     "01. 個人/02. 專注Study/RxKotlin/20200207 - Study RxKotlin.md",
     "01. 個人/01. Daily/2021/08/2021-08-16(週一).md",
     "01. 個人/01. Daily/2021/08/2021-08-14(週六).md",
@@ -124,7 +125,6 @@
     "01. 個人/01. Daily/2020/12/2020-12-11(Fri).md",
     "01. 個人/01. Daily/2020/12/2020-12-09(Wed).md",
     "01. 個人/01. Daily/2018/2018-10-12(週五).md",
-    "00. Inbox/00. Inbox/A cheatsheet of modern C++ language and library features.md",
-    "00. Inbox/00. Inbox/Modern C++ use in Chromium.md"
+    "00. Inbox/00. Inbox/A cheatsheet of modern C++ language and library features.md"
   ]
 }

03. Programming/Kotlin/class.md

@@ -39,7 +39,7 @@ class VerySimple(val para1: Int, val para2: String ) {
 }
 ```
 
-## init區塊
+## `init` 區塊
 `init`是個優先權高於「主要constructor」的執行區塊，如下：
 ```kotlin
 class VerySimple(val para1: Int, val para2: String ) {

03. Programming/Kotlin/run, let, with, also 和 apply.md

@@ -0,0 +1,22 @@
+run, let, with, also 和 apply 這幾個都是可以搭配object 使用的函數，它們之間的差異不大，主要是讓程式看起來更符合語意。
+以下解釋各個的差別。
+
+## run
+run後面的區塊會回傳「最後一行」，所以可以進行「串接」。如下：
+```kotlin
+run {
+    val telephone = Telephone()
+    telephone.whoCallMe = "English"
+    telephone    // <--  telephone 被帶到下一個 Chain
+}.callMe("Softest part of heart")    // <-- 這裡可以執行 `Telephone` Class 的方法
+```
+
+## object.run
+object.run跟[[run, let, with, also 和 apply#run]]是一樣的，只是object.run是讓object呼叫的，而且lambda scope中的物件會變成this，如下：
+```kotlin
+val anObject = MyObject()
+anObject.run {
+    this.doSomething()  // this就是anObject
+}
+```
+