diff --git a/05 - Calc And Convert/operations/.idea/.gitignore b/05 - Calc And Convert/operations/.idea/.gitignore
deleted file mode 100644
index 35410ca..0000000
--- a/05 - Calc And Convert/operations/.idea/.gitignore	
+++ /dev/null
@@ -1,8 +0,0 @@
-# 默认忽略的文件
-/shelf/
-/workspace.xml
-# 基于编辑器的 HTTP 客户端请求
-/httpRequests/
-# Datasource local storage ignored files
-/dataSources/
-/dataSources.local.xml
diff --git a/05 - Calc And Convert/operations/.idea/modules.xml b/05 - Calc And Convert/operations/.idea/modules.xml
deleted file mode 100644
index bc5464a..0000000
--- a/05 - Calc And Convert/operations/.idea/modules.xml	
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectModuleManager">
-    <modules>
-      <module fileurl="file://$PROJECT_DIR$/.idea/operations.iml" filepath="$PROJECT_DIR$/.idea/operations.iml" />
-    </modules>
-  </component>
-</project>
\ No newline at end of file
diff --git a/05 - Calc And Convert/operations/.idea/operations.iml b/05 - Calc And Convert/operations/.idea/operations.iml
deleted file mode 100644
index 5e764c4..0000000
--- a/05 - Calc And Convert/operations/.idea/operations.iml	
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="WEB_MODULE" version="4">
-  <component name="Go" enabled="true" />
-  <component name="NewModuleRootManager">
-    <content url="file://$MODULE_DIR$" />
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-</module>
\ No newline at end of file
diff --git a/05 - Calc And Convert/operations/.idea/vcs.xml b/05 - Calc And Convert/operations/.idea/vcs.xml
deleted file mode 100644
index b2bdec2..0000000
--- a/05 - Calc And Convert/operations/.idea/vcs.xml	
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
-  </component>
-</project>
\ No newline at end of file
diff --git a/07-Array And List And Map/Collections/.idea/.gitignore b/07-Array And List And Map/Collections/.idea/.gitignore
deleted file mode 100644
index 35410ca..0000000
--- a/07-Array And List And Map/Collections/.idea/.gitignore	
+++ /dev/null
@@ -1,8 +0,0 @@
-# 默认忽略的文件
-/shelf/
-/workspace.xml
-# 基于编辑器的 HTTP 客户端请求
-/httpRequests/
-# Datasource local storage ignored files
-/dataSources/
-/dataSources.local.xml
diff --git a/07-Array And List And Map/Collections/.idea/Collections.iml b/07-Array And List And Map/Collections/.idea/Collections.iml
deleted file mode 100644
index 5e764c4..0000000
--- a/07-Array And List And Map/Collections/.idea/Collections.iml	
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="WEB_MODULE" version="4">
-  <component name="Go" enabled="true" />
-  <component name="NewModuleRootManager">
-    <content url="file://$MODULE_DIR$" />
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-</module>
\ No newline at end of file
diff --git a/07-Array And List And Map/Collections/.idea/modules.xml b/07-Array And List And Map/Collections/.idea/modules.xml
deleted file mode 100644
index 5ed3b80..0000000
--- a/07-Array And List And Map/Collections/.idea/modules.xml	
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectModuleManager">
-    <modules>
-      <module fileurl="file://$PROJECT_DIR$/.idea/Collections.iml" filepath="$PROJECT_DIR$/.idea/Collections.iml" />
-    </modules>
-  </component>
-</project>
\ No newline at end of file
diff --git a/07-Array And List And Map/Collections/.idea/vcs.xml b/07-Array And List And Map/Collections/.idea/vcs.xml
deleted file mode 100644
index b2bdec2..0000000
--- a/07-Array And List And Map/Collections/.idea/vcs.xml	
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
-  </component>
-</project>
\ No newline at end of file
diff --git a/09-FuncAndTypes/funcTypes/.idea/.gitignore b/09-FuncAndTypes/funcTypes/.idea/.gitignore
deleted file mode 100644
index 35410ca..0000000
--- a/09-FuncAndTypes/funcTypes/.idea/.gitignore
+++ /dev/null
@@ -1,8 +0,0 @@
-# 默认忽略的文件
-/shelf/
-/workspace.xml
-# 基于编辑器的 HTTP 客户端请求
-/httpRequests/
-# Datasource local storage ignored files
-/dataSources/
-/dataSources.local.xml
diff --git a/09-FuncAndTypes/funcTypes/.idea/funcTypes.iml b/09-FuncAndTypes/funcTypes/.idea/funcTypes.iml
deleted file mode 100644
index 5e764c4..0000000
--- a/09-FuncAndTypes/funcTypes/.idea/funcTypes.iml
+++ /dev/null
@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="WEB_MODULE" version="4">
-  <component name="Go" enabled="true" />
-  <component name="NewModuleRootManager">
-    <content url="file://$MODULE_DIR$" />
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-</module>
\ No newline at end of file
diff --git a/09-FuncAndTypes/funcTypes/.idea/modules.xml b/09-FuncAndTypes/funcTypes/.idea/modules.xml
deleted file mode 100644
index d3d3528..0000000
--- a/09-FuncAndTypes/funcTypes/.idea/modules.xml
+++ /dev/null
@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectModuleManager">
-    <modules>
-      <module fileurl="file://$PROJECT_DIR$/.idea/funcTypes.iml" filepath="$PROJECT_DIR$/.idea/funcTypes.iml" />
-    </modules>
-  </component>
-</project>
\ No newline at end of file
diff --git a/09-FuncAndTypes/funcTypes/.idea/vcs.xml b/09-FuncAndTypes/funcTypes/.idea/vcs.xml
deleted file mode 100644
index b2bdec2..0000000
--- a/09-FuncAndTypes/funcTypes/.idea/vcs.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
-  </component>
-</project>
\ No newline at end of file