From f47e7e952f12eb7775413afe03d3acf99012eb17 Mon Sep 17 00:00:00 2001
From: _Fighter <lylovejava@yeah.net>
Date: Wed, 22 Dec 2021 00:13:17 +0800
Subject: [PATCH] =?UTF-8?q?2021=E5=B9=B412=E6=9C=8821=E6=97=A5?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .idea/workspace.xml                           | 188 +++++++++++++-----
 arrays.go => arrays/arrays.go                 |   0
 basic.go => basic/basic.go                    |  83 ++++----
 branch.go                                     |  61 ------
 branch/branch.go                              |  60 ++++++
 func.go => func/func.go                       |   0
 helloworld.go => helloworld/helloworld.go     |   0
 .../nonrepeating.go                           |   0
 queue/entry/main.go                           |  20 ++
 queue/queue.go                                |  16 ++
 readerWriter/main.go                          |  42 ++++
 retriever/main.go                             |  85 ++++++++
 retriever/mock/mockretriever.go               |  14 ++
 retriever/real/realretriever.go               |  39 ++++
 sliceops.go => sliceops/sliceops.go           |   0
 slices.go => slices/slices.go                 |   0
 strings.go => string/strings.go               |   0
 test.txt                                      |   2 +-
 tree/MenuNode.go                              |   5 +
 tree/entry/entry.go                           |  33 +++
 20 files changed, 499 insertions(+), 149 deletions(-)
 rename arrays.go => arrays/arrays.go (100%)
 rename basic.go => basic/basic.go (50%)
 delete mode 100644 branch.go
 create mode 100644 branch/branch.go
 rename func.go => func/func.go (100%)
 rename helloworld.go => helloworld/helloworld.go (100%)
 rename nonrepeating.go => nonrepeating/nonrepeating.go (100%)
 create mode 100644 queue/entry/main.go
 create mode 100644 queue/queue.go
 create mode 100644 readerWriter/main.go
 create mode 100644 retriever/main.go
 create mode 100644 retriever/mock/mockretriever.go
 create mode 100644 retriever/real/realretriever.go
 rename sliceops.go => sliceops/sliceops.go (100%)
 rename slices.go => slices/slices.go (100%)
 rename strings.go => string/strings.go (100%)

diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index a40cefe..e80a18f 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -19,11 +19,26 @@
     <select />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="d365b3bd-6b35-4929-97b9-bcb786acfffc" name="Default Changelist" comment="2021年12月7日">
-      <change afterPath="$PROJECT_DIR$/nonrepeating.go" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/strings.go" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/tree/MenuNode.go" afterDir="false" />
+    <list default="true" id="d365b3bd-6b35-4929-97b9-bcb786acfffc" name="Default Changelist" comment="2021年12月13日">
+      <change afterPath="$PROJECT_DIR$/queue/entry/main.go" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/queue/queue.go" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/readerWriter/main.go" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/retriever/main.go" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/retriever/mock/mockretriever.go" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/retriever/real/realretriever.go" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/arrays.go" beforeDir="false" afterPath="$PROJECT_DIR$/arrays/arrays.go" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/basic.go" beforeDir="false" afterPath="$PROJECT_DIR$/basic/basic.go" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/branch.go" beforeDir="false" afterPath="$PROJECT_DIR$/branch/branch.go" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/func.go" beforeDir="false" afterPath="$PROJECT_DIR$/func/func.go" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/helloworld.go" beforeDir="false" afterPath="$PROJECT_DIR$/helloworld/helloworld.go" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/nonrepeating.go" beforeDir="false" afterPath="$PROJECT_DIR$/nonrepeating/nonrepeating.go" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/sliceops.go" beforeDir="false" afterPath="$PROJECT_DIR$/sliceops/sliceops.go" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/slices.go" beforeDir="false" afterPath="$PROJECT_DIR$/slices/slices.go" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/strings.go" beforeDir="false" afterPath="$PROJECT_DIR$/string/strings.go" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/test.txt" beforeDir="false" afterPath="$PROJECT_DIR$/test.txt" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/tree/MenuNode.go" beforeDir="false" afterPath="$PROJECT_DIR$/tree/MenuNode.go" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/tree/entry/entry.go" beforeDir="false" afterPath="$PROJECT_DIR$/tree/entry/entry.go" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -33,6 +48,7 @@
   <component name="FileTemplateManagerImpl">
     <option name="RECENT_TEMPLATES">
       <list>
+        <option value="Go File" />
         <option value="Go Application" />
       </list>
     </option>
@@ -58,74 +74,85 @@
     <property name="WebServerToolWindowFactoryState" value="false" />
     <property name="aspect.path.notification.shown" value="true" />
     <property name="go.import.settings.migrated" value="true" />
+    <property name="last_opened_file_path" value="$PROJECT_DIR$" />
     <property name="nodejs_package_manager_path" value="npm" />
   </component>
-  <component name="RunManager" selected="Go Build.go build learngo/tree">
-    <configuration default="true" type="ArquillianTestNG" factoryName="" nameIsGenerated="true">
+  <component name="RecentsManager">
+    <key name="CopyFile.RECENT_KEYS">
+      <recent name="$PROJECT_DIR$" />
+    </key>
+    <key name="MoveFile.RECENT_KEYS">
+      <recent name="$PROJECT_DIR$/string" />
+      <recent name="$PROJECT_DIR$/slices" />
+      <recent name="$PROJECT_DIR$/sliceops" />
+      <recent name="$PROJECT_DIR$/nonrepeating" />
+      <recent name="$PROJECT_DIR$/helloworld" />
+    </key>
+  </component>
+  <component name="RunManager" selected="Go Build.go build learngo/readerWriter">
+    <configuration default="true" type="ArquillianJUnit" factoryName="" nameIsGenerated="true">
       <option name="arquillianRunConfiguration">
         <value>
           <option name="containerStateName" value="" />
         </value>
       </option>
-      <option name="TEST_OBJECT" value="CLASS" />
-      <properties />
-      <listeners />
+      <option name="TEST_OBJECT" value="class" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="go build learngo (3)" type="GoApplicationRunConfiguration" factoryName="Go Application" temporary="true" nameIsGenerated="true">
+    <configuration name="go build learngo/queue/entry" type="GoApplicationRunConfiguration" factoryName="Go Application" temporary="true" nameIsGenerated="true">
       <module name="learngo" />
       <working_directory value="$PROJECT_DIR$" />
-      <kind value="FILE" />
-      <filePath value="$PROJECT_DIR$/sliceops.go" />
-      <package value="learngo" />
+      <kind value="PACKAGE" />
+      <filePath value="$PROJECT_DIR$/queue/entry/main.go" />
+      <package value="learngo/queue/entry" />
       <directory value="$PROJECT_DIR$" />
       <method v="2" />
     </configuration>
-    <configuration name="go build learngo (4)" type="GoApplicationRunConfiguration" factoryName="Go Application" temporary="true" nameIsGenerated="true">
+    <configuration name="go build learngo/readerWriter" type="GoApplicationRunConfiguration" factoryName="Go Application" temporary="true" nameIsGenerated="true">
       <module name="learngo" />
       <working_directory value="$PROJECT_DIR$" />
-      <kind value="FILE" />
-      <filePath value="$PROJECT_DIR$/nonrepeating.go" />
-      <package value="learngo" />
+      <kind value="PACKAGE" />
+      <filePath value="$PROJECT_DIR$/readerWriter/main.go" />
+      <package value="learngo/readerWriter" />
       <directory value="$PROJECT_DIR$" />
       <method v="2" />
     </configuration>
-    <configuration name="go build learngo/tree" type="GoApplicationRunConfiguration" factoryName="Go Application" temporary="true" nameIsGenerated="true">
+    <configuration name="go build learngo/retriever" type="GoApplicationRunConfiguration" factoryName="Go Application" temporary="true" nameIsGenerated="true">
       <module name="learngo" />
       <working_directory value="$PROJECT_DIR$" />
       <kind value="PACKAGE" />
-      <filePath value="$PROJECT_DIR$/tree/MenuNode.go" />
-      <package value="learngo/tree" />
+      <filePath value="$PROJECT_DIR$/retriever/main.go" />
+      <package value="learngo/retriever" />
       <directory value="$PROJECT_DIR$" />
       <method v="2" />
     </configuration>
-    <configuration name="go build strings.go" type="GoApplicationRunConfiguration" factoryName="Go Application" temporary="true" nameIsGenerated="true">
+    <configuration name="go build learngo/tree" type="GoApplicationRunConfiguration" factoryName="Go Application" temporary="true" nameIsGenerated="true">
       <module name="learngo" />
       <working_directory value="$PROJECT_DIR$" />
-      <kind value="FILE" />
-      <filePath value="$PROJECT_DIR$/strings.go" />
-      <package value="learngo" />
+      <kind value="PACKAGE" />
+      <filePath value="$PROJECT_DIR$/tree/MenuNode.go" />
+      <package value="learngo/tree" />
       <directory value="$PROJECT_DIR$" />
       <method v="2" />
     </configuration>
-    <configuration name="slices" type="GoApplicationRunConfiguration" factoryName="Go Application" temporary="true">
+    <configuration name="go build learngo/tree/entry" type="GoApplicationRunConfiguration" factoryName="Go Application" temporary="true" nameIsGenerated="true">
       <module name="learngo" />
       <working_directory value="$PROJECT_DIR$" />
-      <kind value="FILE" />
-      <filePath value="$PROJECT_DIR$/slices.go" />
-      <package value="learngo" />
+      <kind value="PACKAGE" />
+      <filePath value="$PROJECT_DIR$/tree/entry/entry.go" />
+      <package value="learngo/tree/entry" />
       <directory value="$PROJECT_DIR$" />
       <method v="2" />
     </configuration>
     <recent_temporary>
       <list>
+        <item itemvalue="Go Build.go build learngo/readerWriter" />
+        <item itemvalue="Go Build.go build learngo/retriever" />
+        <item itemvalue="Go Build.go build learngo/tree/entry" />
+        <item itemvalue="Go Build.go build learngo/queue/entry" />
         <item itemvalue="Go Build.go build learngo/tree" />
-        <item itemvalue="Go Build.go build learngo (4)" />
-        <item itemvalue="Go Build.go build strings.go" />
-        <item itemvalue="Go Build.go build learngo (3)" />
-        <item itemvalue="Go Build.slices" />
       </list>
     </recent_temporary>
   </component>
@@ -157,7 +184,17 @@
       <workItem from="1639317342734" duration="1661000" />
       <workItem from="1639319123956" duration="1167000" />
       <workItem from="1639321737905" duration="1332000" />
-      <workItem from="1639324378299" duration="1154000" />
+      <workItem from="1639324378299" duration="1611000" />
+      <workItem from="1639410861527" duration="1813000" />
+      <workItem from="1639496207161" duration="1452000" />
+      <workItem from="1639498040381" duration="1603000" />
+      <workItem from="1639583195649" duration="316000" />
+      <workItem from="1639585026841" duration="47000" />
+      <workItem from="1639923387642" duration="581000" />
+      <workItem from="1640010328393" duration="1512000" />
+      <workItem from="1640012110718" duration="1690000" />
+      <workItem from="1640013935368" duration="446000" />
+      <workItem from="1640101892048" duration="1269000" />
     </task>
     <task id="LOCAL-00001" summary="2021年12月5日">
       <created>1638720681912</created>
@@ -194,7 +231,49 @@
       <option name="project" value="LOCAL" />
       <updated>1638894518419</updated>
     </task>
-    <option name="localTasksCounter" value="6" />
+    <task id="LOCAL-00006" summary="2021年12月10日">
+      <created>1639325723378</created>
+      <option name="number" value="00006" />
+      <option name="presentableId" value="LOCAL-00006" />
+      <option name="project" value="LOCAL" />
+      <updated>1639325723379</updated>
+    </task>
+    <task id="LOCAL-00007" summary="2021年12月10日">
+      <created>1639325745611</created>
+      <option name="number" value="00007" />
+      <option name="presentableId" value="LOCAL-00007" />
+      <option name="project" value="LOCAL" />
+      <updated>1639325745611</updated>
+    </task>
+    <task id="LOCAL-00008" summary="2021年12月11日">
+      <created>1639325758148</created>
+      <option name="number" value="00008" />
+      <option name="presentableId" value="LOCAL-00008" />
+      <option name="project" value="LOCAL" />
+      <updated>1639325758148</updated>
+    </task>
+    <task id="LOCAL-00009" summary="2021年12月11日">
+      <created>1639325805904</created>
+      <option name="number" value="00009" />
+      <option name="presentableId" value="LOCAL-00009" />
+      <option name="project" value="LOCAL" />
+      <updated>1639325805904</updated>
+    </task>
+    <task id="LOCAL-00010" summary="2021年12月13日">
+      <created>1639412304915</created>
+      <option name="number" value="00010" />
+      <option name="presentableId" value="LOCAL-00010" />
+      <option name="project" value="LOCAL" />
+      <updated>1639412304915</updated>
+    </task>
+    <task id="LOCAL-00011" summary="2021年12月13日">
+      <created>1639412316956</created>
+      <option name="number" value="00011" />
+      <option name="presentableId" value="LOCAL-00011" />
+      <option name="project" value="LOCAL" />
+      <updated>1639412316956</updated>
+    </task>
+    <option name="localTasksCounter" value="12" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
@@ -216,7 +295,10 @@
     <MESSAGE value="2021年12月5日" />
     <MESSAGE value="2021年12月6日" />
     <MESSAGE value="2021年12月7日" />
-    <option name="LAST_COMMIT_MESSAGE" value="2021年12月7日" />
+    <MESSAGE value="2021年12月10日" />
+    <MESSAGE value="2021年12月11日" />
+    <MESSAGE value="2021年12月13日" />
+    <option name="LAST_COMMIT_MESSAGE" value="2021年12月13日" />
   </component>
   <component name="VgoProject">
     <integration-enabled>true</integration-enabled>
@@ -236,30 +318,42 @@
       <screen x="-1920" y="-196" width="1920" height="1055" />
     </state>
     <state x="-1496" y="-10" key="#com.intellij.execution.impl.EditConfigurationsDialog/-1920.-196.1920.1055/0.25.1311.743@-1920.-196.1920.1055" timestamp="1638463705929" />
-    <state width="1324" height="297" key="GridCell.Tab.0.bottom" timestamp="1639325577505">
-      <screen x="0" y="0" width="1366" height="768" />
+    <state x="496" y="116" key="#com.intellij.ide.util.MemberChooser" timestamp="1640013650164">
+      <screen x="0" y="25" width="1366" height="743" />
+    </state>
+    <state x="496" y="116" key="#com.intellij.ide.util.MemberChooser/1366.-158.1860.1055/0.25.1366.743@0.25.1366.743" timestamp="1640013650164" />
+    <state width="1324" height="197" key="GridCell.Tab.0.bottom" timestamp="1640103022679">
+      <screen x="0" y="25" width="1366" height="743" />
     </state>
     <state width="1878" height="455" key="GridCell.Tab.0.bottom/-1920.-196.1920.1055/0.25.1311.743@-1920.-196.1920.1055" timestamp="1638463841375" />
+    <state width="1324" height="197" key="GridCell.Tab.0.bottom/1366.-158.1859.1055/0.25.1366.743@0.25.1366.743" timestamp="1640103022679" />
     <state width="1817" height="165" key="GridCell.Tab.0.bottom/1366.-158.1859.1055/0.25.1366.743@1366.-158.1859.1055" timestamp="1638894523546" />
-    <state width="1324" height="297" key="GridCell.Tab.0.bottom/1366.-183.1920.1080/0.0.1366.768@0.0.1366.768" timestamp="1639325577505" />
-    <state width="1324" height="297" key="GridCell.Tab.0.center" timestamp="1639325577501">
-      <screen x="0" y="0" width="1366" height="768" />
+    <state width="1324" height="199" key="GridCell.Tab.0.bottom/1366.-158.1860.1055/0.25.1366.743@0.25.1366.743" timestamp="1640014417559" />
+    <state width="1324" height="271" key="GridCell.Tab.0.bottom/1366.-183.1920.1080/0.0.1366.768@0.0.1366.768" timestamp="1639499455426" />
+    <state width="1324" height="197" key="GridCell.Tab.0.center" timestamp="1640103022677">
+      <screen x="0" y="25" width="1366" height="743" />
     </state>
     <state width="1878" height="455" key="GridCell.Tab.0.center/-1920.-196.1920.1055/0.25.1311.743@-1920.-196.1920.1055" timestamp="1638463841373" />
+    <state width="1324" height="197" key="GridCell.Tab.0.center/1366.-158.1859.1055/0.25.1366.743@0.25.1366.743" timestamp="1640103022677" />
     <state width="1817" height="165" key="GridCell.Tab.0.center/1366.-158.1859.1055/0.25.1366.743@1366.-158.1859.1055" timestamp="1638894523545" />
-    <state width="1324" height="297" key="GridCell.Tab.0.center/1366.-183.1920.1080/0.0.1366.768@0.0.1366.768" timestamp="1639325577501" />
-    <state width="1324" height="297" key="GridCell.Tab.0.left" timestamp="1639325577498">
-      <screen x="0" y="0" width="1366" height="768" />
+    <state width="1324" height="199" key="GridCell.Tab.0.center/1366.-158.1860.1055/0.25.1366.743@0.25.1366.743" timestamp="1640014417558" />
+    <state width="1324" height="271" key="GridCell.Tab.0.center/1366.-183.1920.1080/0.0.1366.768@0.0.1366.768" timestamp="1639499455424" />
+    <state width="1324" height="197" key="GridCell.Tab.0.left" timestamp="1640103022676">
+      <screen x="0" y="25" width="1366" height="743" />
     </state>
     <state width="1878" height="455" key="GridCell.Tab.0.left/-1920.-196.1920.1055/0.25.1311.743@-1920.-196.1920.1055" timestamp="1638463841373" />
+    <state width="1324" height="197" key="GridCell.Tab.0.left/1366.-158.1859.1055/0.25.1366.743@0.25.1366.743" timestamp="1640103022676" />
     <state width="1817" height="165" key="GridCell.Tab.0.left/1366.-158.1859.1055/0.25.1366.743@1366.-158.1859.1055" timestamp="1638894523545" />
-    <state width="1324" height="297" key="GridCell.Tab.0.left/1366.-183.1920.1080/0.0.1366.768@0.0.1366.768" timestamp="1639325577498" />
-    <state width="1324" height="297" key="GridCell.Tab.0.right" timestamp="1639325577503">
-      <screen x="0" y="0" width="1366" height="768" />
+    <state width="1324" height="199" key="GridCell.Tab.0.left/1366.-158.1860.1055/0.25.1366.743@0.25.1366.743" timestamp="1640014417557" />
+    <state width="1324" height="271" key="GridCell.Tab.0.left/1366.-183.1920.1080/0.0.1366.768@0.0.1366.768" timestamp="1639499455421" />
+    <state width="1324" height="197" key="GridCell.Tab.0.right" timestamp="1640103022678">
+      <screen x="0" y="25" width="1366" height="743" />
     </state>
     <state width="1878" height="455" key="GridCell.Tab.0.right/-1920.-196.1920.1055/0.25.1311.743@-1920.-196.1920.1055" timestamp="1638463841374" />
+    <state width="1324" height="197" key="GridCell.Tab.0.right/1366.-158.1859.1055/0.25.1366.743@0.25.1366.743" timestamp="1640103022678" />
     <state width="1817" height="165" key="GridCell.Tab.0.right/1366.-158.1859.1055/0.25.1366.743@1366.-158.1859.1055" timestamp="1638894523545" />
-    <state width="1324" height="297" key="GridCell.Tab.0.right/1366.-183.1920.1080/0.0.1366.768@0.0.1366.768" timestamp="1639325577503" />
+    <state width="1324" height="199" key="GridCell.Tab.0.right/1366.-158.1860.1055/0.25.1366.743@0.25.1366.743" timestamp="1640014417558" />
+    <state width="1324" height="271" key="GridCell.Tab.0.right/1366.-183.1920.1080/0.0.1366.768@0.0.1366.768" timestamp="1639499455425" />
     <state width="1324" height="156" key="GridCell.Tab.1.bottom" timestamp="1639319595271">
       <screen x="0" y="0" width="1366" height="768" />
     </state>
diff --git a/arrays.go b/arrays/arrays.go
similarity index 100%
rename from arrays.go
rename to arrays/arrays.go
diff --git a/basic.go b/basic/basic.go
similarity index 50%
rename from basic.go
rename to basic/basic.go
index 920a7c1..b3aedec 100644
--- a/basic.go
+++ b/basic/basic.go
@@ -7,94 +7,97 @@ import (
 )
 
 /*此处不能使用 := 来定义变量
- go 语言都中包内变量，go 没有全局变量
- 函数包变量可以不使用，
+go 语言都中包内变量，go 没有全局变量
+函数包变量可以不使用，
 */
-var xx =3
-var ss =100
+var xx = 3
+var ss = 100
+
 /*统一定义变量*/
-var(
-	x1=23
-	x2=true
-	x3=323.23
+var (
+	x1 = 23
+	x2 = true
+	x3 = 323.23
 )
 
-func variableZeroValue()  {
+func variableZeroValue() {
 	/*函数内部变量必须被使用*/
 	var a int
 	var s string
 	fmt.Printf("%d  %q\n", a, s)
 }
 
-func variableInitialValue()  {
-	var a ,b int = 3,4
+func variableInitialValue() {
+	var a, b int = 3, 4
 	var s string = "abc"
-	fmt.Println(a,b, s)
+	fmt.Println(a, b, s)
 }
 
-
-func variableTypeDeduction()  {
-	var x ,b  ,c,e,f  = 3.23,4,"abdad",true, 4.54
-	fmt.Println(x,b,f+1, c,e)
+func variableTypeDeduction() {
+	var x, b, c, e, f = 3.23, 4, "abdad", true, 4.54
+	fmt.Println(x, b, f+1, c, e)
 }
 
-func variableShorter()  {
-	 /*
+func variableShorter() {
+	/*
 	   不使用 var
 	   第一次定义变量可以使用:=,但是只能在函数内部使用，外部不能使用
-	 */
-	 x ,b  ,c,e,f  := 3.23,4,"abdad",true, 4.54
-	fmt.Println(x,b,f+1, c,e)
+	*/
+	x, b, c, e, f := 3.23, 4, "abdad", true, 4.54
+	fmt.Println(x, b, f+1, c, e)
 }
-func euler()  {
-	c:=3 +4i
+func euler() {
+	c := 3 + 4i
 	fmt.Println(cmplx.Abs(c))
 }
+
 /*强制转换*/
-func triangle()  {
-	a ,b  :=3,5
+func triangle() {
+	a, b := 3, 5
 	var c int
 	c = int(math.Sqrt(float64(a*a + b*b)))
 	fmt.Println(c)
 }
+
 /*常量*/
-func consts()  {
+func consts() {
 	/*const filename="abc.txt"
 	const a, b  = 3, 4 */
 	/* 集中写常量*/
-	const(
-	  filename ="abc.txt"
-	  a, b  = 3, 4
+	const (
+		filename = "abc.txt"
+		a, b     = 3, 4
 	)
 	var c int
 	c = int(math.Sqrt(a*a + b*b))
-	fmt.Println(filename,c )
+	fmt.Println(filename, c)
 }
+
 /*枚举*/
-func enums()  {
+func enums() {
 	/*常量定义必须给赋值*/
-	const(
-		cpp=iota // 自动填充递长
+	const (
+		cpp = iota // 自动填充递长
 		java
 		python
 		golang
 		javasscipt
-		 _      // 下划线跳过自动填充值
+		_ // 下划线跳过自动填充值
 		php
 	)
-	const x int =0
-	fmt.Println(x, cpp,python,golang,javasscipt,java,php)
+	const x int = 0
+	fmt.Println(x, cpp, python, golang, javasscipt, java, php)
 
 	/*设置自增表达式*/
-	const(
-		b = 1 <<(10*iota)
+	const (
+		b = 1 << (10 * iota)
 		kb
 		mb
 		gb
 		tb
 		pb
 	)
-	fmt.Println(b,kb,mb,gb,tb,pb)
+	fmt.Println(b, kb, mb, gb, tb, pb)
 }
 
 func main() {
@@ -102,7 +105,7 @@ func main() {
 	variableInitialValue()
 	variableTypeDeduction()
 	variableShorter()
-	fmt.Println(x1,x2,x3)
+	fmt.Println(x1, x2, x3)
 	euler()
 	triangle()
 	consts()
diff --git a/branch.go b/branch.go
deleted file mode 100644
index 2a169c9..0000000
--- a/branch.go
+++ /dev/null
@@ -1,61 +0,0 @@
-package main
-
-import (
- "fmt"
- "io/ioutil"
-)
-
-func ifcondition()  {
- const filename = "test.txt"
- // ReadFile reads the file named by filename and returns the contents.
- // A successful call returns err == nil, not err == EOF. Because ReadFile
- // reads the whole file, it does not treat an EOF from Read as an error
- // to be reported.
- contents ,err := ioutil.ReadFile(filename)
- // if不需要 括号
- if err != nil{
-  fmt.Println(err)
- }else{
-  fmt.Printf("%s\n" ,contents)
- }
-
- // 简单写法
- if  content ,err := ioutil.ReadFile(filename); err != nil{
-  fmt.Println(err)
- } else{
-  fmt.Printf("%s\n" ,content)
- }
- //fmt.Printf("%s\n" ,content)  此处不能再访问 content ,生命周期在if中，外部不能访问
-}
-
-func grade(score int ) string  {
-  g:= ""
-  // switch 后面可以跟 选择参数，也可以不跟参数
-  switch  {
-      case score < 0 || score >100:
-       // panic 报错并中断程序执行，
-        panic(fmt.Sprintf( "Wront score: %d",score))
-      case score < 60 :
-         g = "不及格"
-      case score < 80:
-         g = "一般"
-      case score < 90:
-        g = "良好"
-      case score <= 100:
-        g = "优秀"
-  }
- return g
-}
-
-
-func main() {
-   ifcondition()
-   fmt.Println(
-    grade(33),
-    grade(67),
-    grade(98),
-    grade(81),
-    grade(100),
-    )
-
-}
diff --git a/branch/branch.go b/branch/branch.go
new file mode 100644
index 0000000..a19e256
--- /dev/null
+++ b/branch/branch.go
@@ -0,0 +1,60 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+)
+
+func ifcondition() {
+	const filename = "test.txt"
+	// ReadFile reads the file named by filename and returns the contents.
+	// A successful call returns err == nil, not err == EOF. Because ReadFile
+	// reads the whole file, it does not treat an EOF from Read as an error
+	// to be reported.
+	contents, err := ioutil.ReadFile(filename)
+	// if不需要 括号
+	if err != nil {
+		fmt.Println(err)
+	} else {
+		fmt.Printf("%s\n", contents)
+	}
+
+	// 简单写法
+	if content, err := ioutil.ReadFile(filename); err != nil {
+		fmt.Println(err)
+	} else {
+		fmt.Printf("%s\n", content)
+	}
+	//fmt.Printf("%s\n" ,content)  此处不能再访问 content ,生命周期在if中，外部不能访问
+}
+
+func grade(score int) string {
+	g := ""
+	// switch 后面可以跟 选择参数，也可以不跟参数
+	switch {
+	case score < 0 || score > 100:
+		// panic 报错并中断程序执行，
+		panic(fmt.Sprintf("Wront score: %d", score))
+	case score < 60:
+		g = "不及格"
+	case score < 80:
+		g = "一般"
+	case score < 90:
+		g = "良好"
+	case score <= 100:
+		g = "优秀"
+	}
+	return g
+}
+
+func main() {
+	ifcondition()
+	fmt.Println(
+		grade(33),
+		grade(67),
+		grade(98),
+		grade(81),
+		grade(100),
+	)
+
+}
diff --git a/func.go b/func/func.go
similarity index 100%
rename from func.go
rename to func/func.go
diff --git a/helloworld.go b/helloworld/helloworld.go
similarity index 100%
rename from helloworld.go
rename to helloworld/helloworld.go
diff --git a/nonrepeating.go b/nonrepeating/nonrepeating.go
similarity index 100%
rename from nonrepeating.go
rename to nonrepeating/nonrepeating.go
diff --git a/queue/entry/main.go b/queue/entry/main.go
new file mode 100644
index 0000000..143edbe
--- /dev/null
+++ b/queue/entry/main.go
@@ -0,0 +1,20 @@
+package main
+
+import (
+	"fmt"
+	"learngo/queue"
+)
+
+func main() {
+
+	q := queue.Queue{1}
+	q.Push(2)
+	q.Push(3)
+	//q.Push(4)
+
+	fmt.Println(q.Pop())
+	fmt.Println(q.Pop())
+	fmt.Println(q.IsEmpty())
+	fmt.Println(q.Pop())
+	fmt.Println(q.IsEmpty())
+}
diff --git a/queue/queue.go b/queue/queue.go
new file mode 100644
index 0000000..03f1219
--- /dev/null
+++ b/queue/queue.go
@@ -0,0 +1,16 @@
+package queue
+
+// 定义别名
+type Queue []interface{}
+
+func (q *Queue) Push(v interface{}) {
+	*q = append(*q, v)
+}
+func (q *Queue) Pop() interface{} {
+	head := (*q)[0]
+	*q = (*q)[1:]
+	return head
+}
+func (q *Queue) IsEmpty() bool {
+	return len(*q) == 0
+}
diff --git a/readerWriter/main.go b/readerWriter/main.go
new file mode 100644
index 0000000..d3dc390
--- /dev/null
+++ b/readerWriter/main.go
@@ -0,0 +1,42 @@
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"strings"
+)
+
+func printFile(filename string) {
+
+	file, err := os.Open(filename)
+	if err != nil {
+		panic(err)
+	}
+	scanner := bufio.NewScanner(file)
+
+	for scanner.Scan() {
+		fmt.Println(scanner.Text())
+	}
+	printFileContests(file)
+}
+func printFileContests(reader io.Reader) {
+	scanner := bufio.NewScanner(reader)
+	for scanner.Scan() {
+		fmt.Println(scanner.Text())
+	}
+}
+
+func main() {
+
+	printFile("test.txt")
+	var str string = "dafwef"
+	s := `test.txt
+		sdfasdf
+wefwef	wefwef"wefwefwfe"   
+		`
+	printFileContests(strings.NewReader(s))
+	printFileContests(bytes.NewBufferString(str))
+}
diff --git a/retriever/main.go b/retriever/main.go
new file mode 100644
index 0000000..bb9adb9
--- /dev/null
+++ b/retriever/main.go
@@ -0,0 +1,85 @@
+package main
+
+import (
+	"fmt"
+	"learngo/retriever/mock"
+	"learngo/retriever/real"
+	"time"
+)
+
+type Retriever interface {
+	Get(url string) string
+}
+
+type Poster interface {
+	Post(url string, form map[string]string) string
+}
+
+const url = "http://www.baidu.com"
+
+func download(r Retriever) string {
+	return r.Get(url)
+}
+
+func post(poster Poster) {
+	poster.Post(url, map[string]string{
+		"name":   "ccmouse",
+		"course": "golang",
+	})
+}
+
+type RetrieverPoster interface {
+	Retriever
+	Poster
+}
+
+func session(s RetrieverPoster) string {
+	s.Post(url, map[string]string{
+		"contents": " 修改后的数据",
+	})
+
+	return "OK"
+	//return s.Get(url)
+}
+
+func main() {
+	var r Retriever
+	r = mock.Retriever{"this is my test interface"}
+	// 查询接口类型
+	fmt.Printf("%T %v", r, r)
+	inspect(r)
+	//fmt.Println(download(r))
+	r = &real.Retriever{
+		UserAgent: "Mozilla/5.0",
+		TimeOut:   time.Minute,
+	}
+	inspect(r)
+	//fmt.Printf("%T %v" ,r,r )
+	//fmt.Println(download(r))
+
+	// type assertion  断言
+	if retriever, ok := r.(mock.Retriever); ok {
+		fmt.Println(retriever.Contents)
+	} else {
+		fmt.Println(" not a mock Retriever")
+	}
+
+	fmt.Println(" =================")
+	retriever := mock.Retriever{"this is default value"}
+	fmt.Println(session(retriever))
+	fmt.Println(" ============= post ====")
+	realretriever := &real.Retriever{UserAgent: "this is default Value"}
+	fmt.Println(session(realretriever))
+	fmt.Println(realretriever.UserAgent)
+
+}
+
+func inspect(r Retriever) {
+	fmt.Printf("%T %v", r, r)
+	switch v := r.(type) {
+	case mock.Retriever:
+		fmt.Println("Contents:", v.Contents)
+	case *real.Retriever:
+		fmt.Println("UserAgent:", v.UserAgent)
+	}
+}
diff --git a/retriever/mock/mockretriever.go b/retriever/mock/mockretriever.go
new file mode 100644
index 0000000..d6d276e
--- /dev/null
+++ b/retriever/mock/mockretriever.go
@@ -0,0 +1,14 @@
+package mock
+
+type Retriever struct {
+	Contents string
+}
+
+func (r Retriever) Post(url string, form map[string]string) string {
+	r.Contents = form["contents"]
+	return "ok"
+}
+
+func (r Retriever) Get(url string) string {
+	return r.Contents
+}
diff --git a/retriever/real/realretriever.go b/retriever/real/realretriever.go
new file mode 100644
index 0000000..c5f5204
--- /dev/null
+++ b/retriever/real/realretriever.go
@@ -0,0 +1,39 @@
+package real
+
+import (
+	"fmt"
+	"net/http"
+	"net/http/httputil"
+	"time"
+)
+
+type Retriever struct {
+	UserAgent string
+	TimeOut   time.Duration
+}
+
+func (r *Retriever) String() string {
+	return fmt.Sprintf(
+		"contents=%s", r.UserAgent,
+	)
+}
+
+func (r *Retriever) Post(url string, form map[string]string) string {
+	r.UserAgent = form["contents"]
+	return "ok"
+}
+
+func (r *Retriever) Get(url string) string {
+
+	resp, err := http.Get(url)
+	if err != nil {
+		panic(err)
+	}
+
+	result, err := httputil.DumpResponse(resp, true)
+	resp.Body.Close()
+	if err != nil {
+		panic(err)
+	}
+	return string(result)
+}
diff --git a/sliceops.go b/sliceops/sliceops.go
similarity index 100%
rename from sliceops.go
rename to sliceops/sliceops.go
diff --git a/slices.go b/slices/slices.go
similarity index 100%
rename from slices.go
rename to slices/slices.go
diff --git a/strings.go b/string/strings.go
similarity index 100%
rename from strings.go
rename to string/strings.go
diff --git a/test.txt b/test.txt
index 4cd109e..2a43ba4 100644
--- a/test.txt
+++ b/test.txt
@@ -2,5 +2,5 @@
 hello world
 aaa
 234234
-
+4567890
 234234234
\ No newline at end of file
diff --git a/tree/MenuNode.go b/tree/MenuNode.go
index cbc484a..0518b76 100644
--- a/tree/MenuNode.go
+++ b/tree/MenuNode.go
@@ -25,3 +25,8 @@ func (node *TreeMenuNode) SetName(name string) {
 	}
 	node.Name = name
 }
+
+// 工厂函数定义
+func CraeteTreeMenuNode(name string) *TreeMenuNode {
+	return &TreeMenuNode{Name: name}
+}
diff --git a/tree/entry/entry.go b/tree/entry/entry.go
index 7172a47..46fb540 100644
--- a/tree/entry/entry.go
+++ b/tree/entry/entry.go
@@ -5,6 +5,25 @@ import (
 	"learngo/tree"
 )
 
+/*
+包扩展
+1、定义别名
+2、使用组合
+*/
+// 组合 TreeMenuNode
+type myTreeNode struct {
+	node *tree.TreeMenuNode
+}
+
+func (myNode *myTreeNode) postOrder() {
+
+	node := myTreeNode{myNode.node.Child}
+	node.postOrder()
+	treeNode := myTreeNode{myNode.node.Perent}
+	treeNode.postOrder()
+	myNode.node.Print()
+}
+
 func main() {
 
 	var menu tree.TreeMenuNode
@@ -40,4 +59,18 @@ func main() {
 	menu.Traverse()
 	org.Traverse()
 
+	// 通过工厂获取
+	root := tree.CraeteTreeMenuNode("测试")
+	fmt.Println(root.Name)
+
+	root.Perent = tree.CraeteTreeMenuNode("1")
+
+	root.Child = tree.CraeteTreeMenuNode("2")
+
+	root.Perent.Perent = tree.CraeteTreeMenuNode("01")
+
+	root.Child.Child = tree.CraeteTreeMenuNode("02")
+
+	root.Perent.Print()
+
 }
-- 
GitLab