Tianqi-Dotes commented on a change in pull request #202:
URL: 
https://github.com/apache/incubator-dolphinscheduler-website/pull/202#discussion_r511608201



##########
File path: docs/en-us/development/code-conduct.md
##########
@@ -0,0 +1,68 @@
+## Code of Conduct
+
+The following Code of Conduct is based on full compliance with the [Apache 
Software Foundation Code of 
Conduct](https://www.apache.org/foundation/policies/conduct.html).
+
+### Development philosophy.
+ - **Consistent** code style, naming, and usage are consistent.  
+ - **Easy to read** code is ambiguous, easy to read and understand, when 
debugging one knows the intent of the code.
+ - **Neat** agree with the concepts of《Refactoring》and《Code Cleanliness》and 
pursue clean and elegant code.
+ - **Abstract** hierarchy is clear and the concepts are refined and 
reasonable. Keep methods, classes, packages, and modules at the same level of 
abstraction.
+ - **Heart** Maintain a sense of responsibility and continue to be carved in 
the spirit of artisans.
+ 
+### Development specifications.
+
+ - Executing `mvn -U clean package -Prelease` can compile and test through all 
test cases. 
+ - The test coverage tool checks for no less than dev branch coverage.
+ - Use Checkstyle to check your code for special reasons for violating 
validation rules. The template location is located at ds_check_style.xml.

Review comment:
       didn't mention this file is under the root directory

##########
File path: docs/en-us/development/code-conduct.md
##########
@@ -0,0 +1,68 @@
+## Code of Conduct
+
+The following Code of Conduct is based on full compliance with the [Apache 
Software Foundation Code of 
Conduct](https://www.apache.org/foundation/policies/conduct.html).
+
+### Development philosophy.
+ - **Consistent** code style, naming, and usage are consistent.  
+ - **Easy to read** code is ambiguous, easy to read and understand, when 
debugging one knows the intent of the code.

Review comment:
       the word ambiguous
   differ from the original doc
   maybe use clear nonambiguous obvious plain unambiguous unequivocal accurate 
instead

##########
File path: docs/en-us/development/code-conduct.md
##########
@@ -0,0 +1,68 @@
+## Code of Conduct
+
+The following Code of Conduct is based on full compliance with the [Apache 
Software Foundation Code of 
Conduct](https://www.apache.org/foundation/policies/conduct.html).
+
+### Development philosophy.
+ - **Consistent** code style, naming, and usage are consistent.  
+ - **Easy to read** code is ambiguous, easy to read and understand, when 
debugging one knows the intent of the code.
+ - **Neat** agree with the concepts of《Refactoring》and《Code Cleanliness》and 
pursue clean and elegant code.
+ - **Abstract** hierarchy is clear and the concepts are refined and 
reasonable. Keep methods, classes, packages, and modules at the same level of 
abstraction.
+ - **Heart** Maintain a sense of responsibility and continue to be carved in 
the spirit of artisans.
+ 
+### Development specifications.
+
+ - Executing `mvn -U clean package -Prelease` can compile and test through all 
test cases. 
+ - The test coverage tool checks for no less than dev branch coverage.
+ - Use Checkstyle to check your code for special reasons for violating 
validation rules. The template location is located at ds_check_style.xml.
+ - Follow the coding specifications.
+
+### Coding specifications.
+
+ - Use linux line breaks.
+ - Indentation (including empty lines) is consistent with the last line.
+ - An empty line is required between the class declaration and the following 
variable or method.
+ - There should be no meaningless empty lines.
+ - Classes, methods, and variables should be named as the name implies and 
abbreviations should be avoided.
+ - Return value variables are named after `result`; `each` is used in loops to 
name loop variables; and `entry` is used in map instead of `each`.
+ - The cached exception is called `e`; Catch the exception and do nothing, and 
the exception is named `ignored`.
+ - Profiles are named in camelCase, and file names are lowercase.

Review comment:
       ambiguous meaning in 2 parts.
   the word 'Profiles'  maybe change to the 'configuration file' would be more 
accurate
   'and file names are lowercase.' didn't mention the initial letter should be 
lowercase.

##########
File path: docs/en-us/development/code-conduct.md
##########
@@ -0,0 +1,68 @@
+## Code of Conduct
+
+The following Code of Conduct is based on full compliance with the [Apache 
Software Foundation Code of 
Conduct](https://www.apache.org/foundation/policies/conduct.html).
+
+### Development philosophy.
+ - **Consistent** code style, naming, and usage are consistent.  
+ - **Easy to read** code is ambiguous, easy to read and understand, when 
debugging one knows the intent of the code.
+ - **Neat** agree with the concepts of《Refactoring》and《Code Cleanliness》and 
pursue clean and elegant code.
+ - **Abstract** hierarchy is clear and the concepts are refined and 
reasonable. Keep methods, classes, packages, and modules at the same level of 
abstraction.
+ - **Heart** Maintain a sense of responsibility and continue to be carved in 
the spirit of artisans.
+ 
+### Development specifications.
+
+ - Executing `mvn -U clean package -Prelease` can compile and test through all 
test cases. 
+ - The test coverage tool checks for no less than dev branch coverage.
+ - Use Checkstyle to check your code for special reasons for violating 
validation rules. The template location is located at ds_check_style.xml.
+ - Follow the coding specifications.
+
+### Coding specifications.
+
+ - Use linux line breaks.
+ - Indentation (including empty lines) is consistent with the last line.
+ - An empty line is required between the class declaration and the following 
variable or method.
+ - There should be no meaningless empty lines.
+ - Classes, methods, and variables should be named as the name implies and 
abbreviations should be avoided.
+ - Return value variables are named after `result`; `each` is used in loops to 
name loop variables; and `entry` is used in map instead of `each`.
+ - The cached exception is called `e`; Catch the exception and do nothing, and 
the exception is named `ignored`.
+ - Profiles are named in camelCase, and file names are lowercase.
+ - Code that requires comment interpretation should be as small as possible 
and interpreted by method name.
+ - `equals` and `==` In a conditional expression, the constant is left, the 
variable is on the right, and in the expression greater than less than 
condition, the variable is left and the constant is right.
+ - In addition to the abstract classes used for inheritance, try to design the 
class as `final`.
+ - Nested loops are as much a method as possible.
+ - The order in which member variables are defined and the order in which 
parameters are passed is consistent across classes and methods.
+ - Priority is given to the use of guard statements.
+ - Classes and methods have minimal access control.
+ - The private method used by the method should follow the method, and if 
there are multiple private methods, the writing private method should appear in 
the same order as the private method in the original method.
+ - Method entry and return values are not allowed to be `null`.
+ - The return and assignment statements of if else are preferred with the 
tri-objective operator.
+ - Priority is given to `LinkedList` and only use `ArrayList` if you need to 
get element values in the collection.

Review comment:
       didn't mention get element values through index when using ArrayList.

##########
File path: docs/en-us/development/code-conduct.md
##########
@@ -0,0 +1,68 @@
+## Code of Conduct
+
+The following Code of Conduct is based on full compliance with the [Apache 
Software Foundation Code of 
Conduct](https://www.apache.org/foundation/policies/conduct.html).
+
+### Development philosophy.
+ - **Consistent** code style, naming, and usage are consistent.  
+ - **Easy to read** code is ambiguous, easy to read and understand, when 
debugging one knows the intent of the code.
+ - **Neat** agree with the concepts of《Refactoring》and《Code Cleanliness》and 
pursue clean and elegant code.
+ - **Abstract** hierarchy is clear and the concepts are refined and 
reasonable. Keep methods, classes, packages, and modules at the same level of 
abstraction.
+ - **Heart** Maintain a sense of responsibility and continue to be carved in 
the spirit of artisans.
+ 
+### Development specifications.
+
+ - Executing `mvn -U clean package -Prelease` can compile and test through all 
test cases. 
+ - The test coverage tool checks for no less than dev branch coverage.
+ - Use Checkstyle to check your code for special reasons for violating 
validation rules. The template location is located at ds_check_style.xml.
+ - Follow the coding specifications.
+
+### Coding specifications.
+
+ - Use linux line breaks.
+ - Indentation (including empty lines) is consistent with the last line.
+ - An empty line is required between the class declaration and the following 
variable or method.
+ - There should be no meaningless empty lines.
+ - Classes, methods, and variables should be named as the name implies and 
abbreviations should be avoided.
+ - Return value variables are named after `result`; `each` is used in loops to 
name loop variables; and `entry` is used in map instead of `each`.
+ - The cached exception is called `e`; Catch the exception and do nothing, and 
the exception is named `ignored`.
+ - Profiles are named in camelCase, and file names are lowercase.
+ - Code that requires comment interpretation should be as small as possible 
and interpreted by method name.
+ - `equals` and `==` In a conditional expression, the constant is left, the 
variable is on the right, and in the expression greater than less than 
condition, the variable is left and the constant is right.
+ - In addition to the abstract classes used for inheritance, try to design the 
class as `final`.
+ - Nested loops are as much a method as possible.
+ - The order in which member variables are defined and the order in which 
parameters are passed is consistent across classes and methods.
+ - Priority is given to the use of guard statements.
+ - Classes and methods have minimal access control.
+ - The private method used by the method should follow the method, and if 
there are multiple private methods, the writing private method should appear in 
the same order as the private method in the original method.
+ - Method entry and return values are not allowed to be `null`.
+ - The return and assignment statements of if else are preferred with the 
tri-objective operator.
+ - Priority is given to `LinkedList` and only use `ArrayList` if you need to 
get element values in the collection.
+ - Collection types such as `ArrayList`,`HashMap` that may produce expansion 
must specify the initial size of the collection to avoid expansion.
+ - Logs and notes are always in English.
+ - Comments can only contain `javadoc`, `todo` and `fixme`.
+ - Exposed classes and methods must have javadoc, other classes and methods 
and methods that override the parent class do not require javadoc.
+
+### Unit test specifications.
+
+ - Test code and production code are subject to the same code specifications.
+ - Unit tests are subject to AIR (Automatic, Independent, Repeatable) Design 
concept.
+   - Automatic : Unit tests should be fully automated, not interactive. Manual 
checking of output results is prohibited, `System.out`, `log`, etc. are not 
allowed, and must be verified with assertions. 
+   - Independent : It is prohibited to call each other between unit test cases 
and to rely on the order of execution. Each unit test can be run independently.
+   - Repeatable : Unit tests cannot be affected by the external environment 
and can be repeated. 
+ - Unit tests are subject to BCDE(Border, Correct, Design, Error) Design 
principles.
+   - Border (Boundary value test) : The expected results are obtained by 
entering the boundaries of loop boundaries, special values, data order, etc.

Review comment:
       try to fix space after the )

##########
File path: docs/en-us/development/code-conduct.md
##########
@@ -0,0 +1,68 @@
+## Code of Conduct
+
+The following Code of Conduct is based on full compliance with the [Apache 
Software Foundation Code of 
Conduct](https://www.apache.org/foundation/policies/conduct.html).
+
+### Development philosophy.
+ - **Consistent** code style, naming, and usage are consistent.  
+ - **Easy to read** code is ambiguous, easy to read and understand, when 
debugging one knows the intent of the code.
+ - **Neat** agree with the concepts of《Refactoring》and《Code Cleanliness》and 
pursue clean and elegant code.
+ - **Abstract** hierarchy is clear and the concepts are refined and 
reasonable. Keep methods, classes, packages, and modules at the same level of 
abstraction.
+ - **Heart** Maintain a sense of responsibility and continue to be carved in 
the spirit of artisans.
+ 
+### Development specifications.
+
+ - Executing `mvn -U clean package -Prelease` can compile and test through all 
test cases. 
+ - The test coverage tool checks for no less than dev branch coverage.
+ - Use Checkstyle to check your code for special reasons for violating 
validation rules. The template location is located at ds_check_style.xml.
+ - Follow the coding specifications.
+
+### Coding specifications.
+
+ - Use linux line breaks.
+ - Indentation (including empty lines) is consistent with the last line.
+ - An empty line is required between the class declaration and the following 
variable or method.
+ - There should be no meaningless empty lines.
+ - Classes, methods, and variables should be named as the name implies and 
abbreviations should be avoided.
+ - Return value variables are named after `result`; `each` is used in loops to 
name loop variables; and `entry` is used in map instead of `each`.
+ - The cached exception is called `e`; Catch the exception and do nothing, and 
the exception is named `ignored`.
+ - Profiles are named in camelCase, and file names are lowercase.
+ - Code that requires comment interpretation should be as small as possible 
and interpreted by method name.
+ - `equals` and `==` In a conditional expression, the constant is left, the 
variable is on the right, and in the expression greater than less than 
condition, the variable is left and the constant is right.
+ - In addition to the abstract classes used for inheritance, try to design the 
class as `final`.
+ - Nested loops are as much a method as possible.
+ - The order in which member variables are defined and the order in which 
parameters are passed is consistent across classes and methods.
+ - Priority is given to the use of guard statements.
+ - Classes and methods have minimal access control.
+ - The private method used by the method should follow the method, and if 
there are multiple private methods, the writing private method should appear in 
the same order as the private method in the original method.
+ - Method entry and return values are not allowed to be `null`.
+ - The return and assignment statements of if else are preferred with the 
tri-objective operator.
+ - Priority is given to `LinkedList` and only use `ArrayList` if you need to 
get element values in the collection.
+ - Collection types such as `ArrayList`,`HashMap` that may produce expansion 
must specify the initial size of the collection to avoid expansion.
+ - Logs and notes are always in English.
+ - Comments can only contain `javadoc`, `todo` and `fixme`.
+ - Exposed classes and methods must have javadoc, other classes and methods 
and methods that override the parent class do not require javadoc.
+
+### Unit test specifications.
+
+ - Test code and production code are subject to the same code specifications.
+ - Unit tests are subject to AIR (Automatic, Independent, Repeatable) Design 
concept.
+   - Automatic : Unit tests should be fully automated, not interactive. Manual 
checking of output results is prohibited, `System.out`, `log`, etc. are not 
allowed, and must be verified with assertions. 
+   - Independent : It is prohibited to call each other between unit test cases 
and to rely on the order of execution. Each unit test can be run independently.
+   - Repeatable : Unit tests cannot be affected by the external environment 
and can be repeated. 
+ - Unit tests are subject to BCDE(Border, Correct, Design, Error) Design 
principles.
+   - Border (Boundary value test) : The expected results are obtained by 
entering the boundaries of loop boundaries, special values, data order, etc.
+   - Correct (Correctness test): The expected results are obtained with the 
correct input.
+   - Design (Rationality Design): Design high-quality unit tests in 
combination with production code design.
+   - Error (Fault tolerance test): The expected results are obtained through 
incorrect input such as illegal data, abnormal flow, etc.
+ - If there is no special reason, the test needs to be fully covered.
+ - Each test case needs to be accurately asserted.
+ - Prepare the environment for code separation from the test code.
+ - Only jUnit `Assert`,hamcrest `CoreMatchers`,Mockito Correlation can use 
static import.
+ - Single-data assertions should use `assertTrue`,`assertFalse`,`assertNull` 
and `assertNotNull`.
+ - Multi-data assertions should use `assertThat`.
+ - Accurate assertion, try not to use `not`,`containsString` assertion.
+ - The true value of the test case should be named actualXXX, and the expected 
value should be named expectedXXX.
+ - Classes and Methods with `@Test` labels do not require javadoc.
+
+ - Public specifications.
+   - Each line is no longer than `200` in length, ensuring that each line is 
semanticly complete for easy understanding.

Review comment:
       wrong spelling word semanticly 

##########
File path: docs/en-us/development/code-conduct.md
##########
@@ -0,0 +1,68 @@
+## Code of Conduct
+
+The following Code of Conduct is based on full compliance with the [Apache 
Software Foundation Code of 
Conduct](https://www.apache.org/foundation/policies/conduct.html).
+
+### Development philosophy.
+ - **Consistent** code style, naming, and usage are consistent.  
+ - **Easy to read** code is ambiguous, easy to read and understand, when 
debugging one knows the intent of the code.
+ - **Neat** agree with the concepts of《Refactoring》and《Code Cleanliness》and 
pursue clean and elegant code.
+ - **Abstract** hierarchy is clear and the concepts are refined and 
reasonable. Keep methods, classes, packages, and modules at the same level of 
abstraction.
+ - **Heart** Maintain a sense of responsibility and continue to be carved in 
the spirit of artisans.
+ 
+### Development specifications.
+
+ - Executing `mvn -U clean package -Prelease` can compile and test through all 
test cases. 
+ - The test coverage tool checks for no less than dev branch coverage.
+ - Use Checkstyle to check your code for special reasons for violating 
validation rules. The template location is located at ds_check_style.xml.
+ - Follow the coding specifications.
+
+### Coding specifications.
+
+ - Use linux line breaks.
+ - Indentation (including empty lines) is consistent with the last line.
+ - An empty line is required between the class declaration and the following 
variable or method.
+ - There should be no meaningless empty lines.
+ - Classes, methods, and variables should be named as the name implies and 
abbreviations should be avoided.
+ - Return value variables are named after `result`; `each` is used in loops to 
name loop variables; and `entry` is used in map instead of `each`.
+ - The cached exception is called `e`; Catch the exception and do nothing, and 
the exception is named `ignored`.
+ - Profiles are named in camelCase, and file names are lowercase.
+ - Code that requires comment interpretation should be as small as possible 
and interpreted by method name.
+ - `equals` and `==` In a conditional expression, the constant is left, the 
variable is on the right, and in the expression greater than less than 
condition, the variable is left and the constant is right.
+ - In addition to the abstract classes used for inheritance, try to design the 
class as `final`.
+ - Nested loops are as much a method as possible.
+ - The order in which member variables are defined and the order in which 
parameters are passed is consistent across classes and methods.
+ - Priority is given to the use of guard statements.
+ - Classes and methods have minimal access control.
+ - The private method used by the method should follow the method, and if 
there are multiple private methods, the writing private method should appear in 
the same order as the private method in the original method.
+ - Method entry and return values are not allowed to be `null`.
+ - The return and assignment statements of if else are preferred with the 
tri-objective operator.
+ - Priority is given to `LinkedList` and only use `ArrayList` if you need to 
get element values in the collection.
+ - Collection types such as `ArrayList`,`HashMap` that may produce expansion 
must specify the initial size of the collection to avoid expansion.
+ - Logs and notes are always in English.
+ - Comments can only contain `javadoc`, `todo` and `fixme`.
+ - Exposed classes and methods must have javadoc, other classes and methods 
and methods that override the parent class do not require javadoc.
+
+### Unit test specifications.
+
+ - Test code and production code are subject to the same code specifications.
+ - Unit tests are subject to AIR (Automatic, Independent, Repeatable) Design 
concept.
+   - Automatic : Unit tests should be fully automated, not interactive. Manual 
checking of output results is prohibited, `System.out`, `log`, etc. are not 
allowed, and must be verified with assertions. 

Review comment:
       try to fix space after the  word Automatic 

##########
File path: docs/en-us/development/code-conduct.md
##########
@@ -0,0 +1,68 @@
+## Code of Conduct
+
+The following Code of Conduct is based on full compliance with the [Apache 
Software Foundation Code of 
Conduct](https://www.apache.org/foundation/policies/conduct.html).
+
+### Development philosophy.
+ - **Consistent** code style, naming, and usage are consistent.  
+ - **Easy to read** code is ambiguous, easy to read and understand, when 
debugging one knows the intent of the code.
+ - **Neat** agree with the concepts of《Refactoring》and《Code Cleanliness》and 
pursue clean and elegant code.
+ - **Abstract** hierarchy is clear and the concepts are refined and 
reasonable. Keep methods, classes, packages, and modules at the same level of 
abstraction.
+ - **Heart** Maintain a sense of responsibility and continue to be carved in 
the spirit of artisans.
+ 
+### Development specifications.
+
+ - Executing `mvn -U clean package -Prelease` can compile and test through all 
test cases. 
+ - The test coverage tool checks for no less than dev branch coverage.
+ - Use Checkstyle to check your code for special reasons for violating 
validation rules. The template location is located at ds_check_style.xml.
+ - Follow the coding specifications.
+
+### Coding specifications.
+
+ - Use linux line breaks.
+ - Indentation (including empty lines) is consistent with the last line.
+ - An empty line is required between the class declaration and the following 
variable or method.
+ - There should be no meaningless empty lines.
+ - Classes, methods, and variables should be named as the name implies and 
abbreviations should be avoided.
+ - Return value variables are named after `result`; `each` is used in loops to 
name loop variables; and `entry` is used in map instead of `each`.
+ - The cached exception is called `e`; Catch the exception and do nothing, and 
the exception is named `ignored`.
+ - Profiles are named in camelCase, and file names are lowercase.
+ - Code that requires comment interpretation should be as small as possible 
and interpreted by method name.
+ - `equals` and `==` In a conditional expression, the constant is left, the 
variable is on the right, and in the expression greater than less than 
condition, the variable is left and the constant is right.
+ - In addition to the abstract classes used for inheritance, try to design the 
class as `final`.
+ - Nested loops are as much a method as possible.
+ - The order in which member variables are defined and the order in which 
parameters are passed is consistent across classes and methods.
+ - Priority is given to the use of guard statements.
+ - Classes and methods have minimal access control.
+ - The private method used by the method should follow the method, and if 
there are multiple private methods, the writing private method should appear in 
the same order as the private method in the original method.
+ - Method entry and return values are not allowed to be `null`.
+ - The return and assignment statements of if else are preferred with the 
tri-objective operator.
+ - Priority is given to `LinkedList` and only use `ArrayList` if you need to 
get element values in the collection.
+ - Collection types such as `ArrayList`,`HashMap` that may produce expansion 
must specify the initial size of the collection to avoid expansion.
+ - Logs and notes are always in English.
+ - Comments can only contain `javadoc`, `todo` and `fixme`.
+ - Exposed classes and methods must have javadoc, other classes and methods 
and methods that override the parent class do not require javadoc.
+
+### Unit test specifications.
+
+ - Test code and production code are subject to the same code specifications.
+ - Unit tests are subject to AIR (Automatic, Independent, Repeatable) Design 
concept.
+   - Automatic : Unit tests should be fully automated, not interactive. Manual 
checking of output results is prohibited, `System.out`, `log`, etc. are not 
allowed, and must be verified with assertions. 
+   - Independent : It is prohibited to call each other between unit test cases 
and to rely on the order of execution. Each unit test can be run independently.
+   - Repeatable : Unit tests cannot be affected by the external environment 
and can be repeated. 

Review comment:
       try to fix space after the word Repeatable 

##########
File path: docs/en-us/development/code-conduct.md
##########
@@ -0,0 +1,68 @@
+## Code of Conduct
+
+The following Code of Conduct is based on full compliance with the [Apache 
Software Foundation Code of 
Conduct](https://www.apache.org/foundation/policies/conduct.html).
+
+### Development philosophy.
+ - **Consistent** code style, naming, and usage are consistent.  
+ - **Easy to read** code is ambiguous, easy to read and understand, when 
debugging one knows the intent of the code.
+ - **Neat** agree with the concepts of《Refactoring》and《Code Cleanliness》and 
pursue clean and elegant code.
+ - **Abstract** hierarchy is clear and the concepts are refined and 
reasonable. Keep methods, classes, packages, and modules at the same level of 
abstraction.
+ - **Heart** Maintain a sense of responsibility and continue to be carved in 
the spirit of artisans.
+ 
+### Development specifications.
+
+ - Executing `mvn -U clean package -Prelease` can compile and test through all 
test cases. 
+ - The test coverage tool checks for no less than dev branch coverage.
+ - Use Checkstyle to check your code for special reasons for violating 
validation rules. The template location is located at ds_check_style.xml.
+ - Follow the coding specifications.
+
+### Coding specifications.
+
+ - Use linux line breaks.
+ - Indentation (including empty lines) is consistent with the last line.
+ - An empty line is required between the class declaration and the following 
variable or method.
+ - There should be no meaningless empty lines.
+ - Classes, methods, and variables should be named as the name implies and 
abbreviations should be avoided.
+ - Return value variables are named after `result`; `each` is used in loops to 
name loop variables; and `entry` is used in map instead of `each`.
+ - The cached exception is called `e`; Catch the exception and do nothing, and 
the exception is named `ignored`.
+ - Profiles are named in camelCase, and file names are lowercase.
+ - Code that requires comment interpretation should be as small as possible 
and interpreted by method name.
+ - `equals` and `==` In a conditional expression, the constant is left, the 
variable is on the right, and in the expression greater than less than 
condition, the variable is left and the constant is right.
+ - In addition to the abstract classes used for inheritance, try to design the 
class as `final`.
+ - Nested loops are as much a method as possible.
+ - The order in which member variables are defined and the order in which 
parameters are passed is consistent across classes and methods.
+ - Priority is given to the use of guard statements.
+ - Classes and methods have minimal access control.
+ - The private method used by the method should follow the method, and if 
there are multiple private methods, the writing private method should appear in 
the same order as the private method in the original method.
+ - Method entry and return values are not allowed to be `null`.
+ - The return and assignment statements of if else are preferred with the 
tri-objective operator.
+ - Priority is given to `LinkedList` and only use `ArrayList` if you need to 
get element values in the collection.
+ - Collection types such as `ArrayList`,`HashMap` that may produce expansion 
must specify the initial size of the collection to avoid expansion.
+ - Logs and notes are always in English.
+ - Comments can only contain `javadoc`, `todo` and `fixme`.
+ - Exposed classes and methods must have javadoc, other classes and methods 
and methods that override the parent class do not require javadoc.
+
+### Unit test specifications.
+
+ - Test code and production code are subject to the same code specifications.
+ - Unit tests are subject to AIR (Automatic, Independent, Repeatable) Design 
concept.
+   - Automatic : Unit tests should be fully automated, not interactive. Manual 
checking of output results is prohibited, `System.out`, `log`, etc. are not 
allowed, and must be verified with assertions. 
+   - Independent : It is prohibited to call each other between unit test cases 
and to rely on the order of execution. Each unit test can be run independently.

Review comment:
       try to fix space after the  word Independent 




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