8. Scala

  • 8.1. Scala tutorial
    Scala is a multi-paradigm programming language, which is designed to integrate the features of obje...
    2023-11-09 23:00:02 UTC
  • 8.2. Scala introduction
    Scala, which stands for Scalable Language, is a multi-paradigm programming language. Martin Odersky of the Fe...
    2023-11-09 23:00:02 UTC
  • 8.3. Scala installation
    Scala language can run on Window, Linux, Unix, Mac OS X and other systems. Scala is based on java, using a lo...
    2023-11-13 23:00:02 UTC
  • 8.4. Scala basic syntax
    If you used to be a Java programmer and know the basics of the Java language, you can quickly learn the basic syntax o...
    2023-11-13 23:00:02 UTC
  • 8.5. Scala data type
    Scala and Java have the same data types, and the following table lists the data types supported by Scala: ...
    2023-11-13 23:00:02 UTC
  • 8.6. Scala variable
    A variable is an easy-to-use placeholder that refers to the computer’s memory address, and it takes up a certain amoun...
    2023-11-13 23:00:02 UTC
  • 8.7. Scala access modifier
    The Scala access modifier is basically the same as Java’s: private,protected,public. If no access modifier is...
    2023-11-13 23:00:02 UTC
  • 8.8. Scala operator
    An operator is a symbol that tells the compiler to perform specified mathematical and logical operations. Sca...
    2023-11-14 23:00:02 UTC
  • 8.9. Scala IF…ELSE statement
    A Scala IF…ELSE statement is a block of code that determines execution by the execution result of one or more statemen...
    2023-11-13 23:00:02 UTC
  • 8.10. Scala cycle
    Sometimes, we may need to execute the same piece of code multiple times. In general, statements are executed sequentia...
    2023-11-13 23:00:02 UTC
  • 8.11. Scala while cycle
    As long as the given condition is true in the Scala language while ...
    2023-11-14 23:00:02 UTC
  • 8.12. Scala do…while cycle
    Not like the while loop tests the loop condition in the loop header, inthe Scala language ...
    2023-11-14 23:00:02 UTC
  • 8.13. Scala for cycle
    A for loop allows you to write a loop control structure that executes a specified number of ...
    2023-11-15 23:00:02 UTC
  • 8.14. Scala break statement
    There is no break statement by default in the Scala language, but you can implement it in another way after version 2....
    2023-12-14 23:00:02 UTC
  • 8.15. Scala method and function
    Scala has methods and functions, and there is little semantic difference between the two. The Scala method is part of ...
    2023-11-14 23:00:02 UTC
  • 8.16. Scala function call-by-name
    Scala’s interpreter has two ways to parse function parameters (function arguments): call-by-value:...
    2023-11-14 23:00:02 UTC
  • 8.17. Scala function-variable argument
    Scala allows you to specify that the last argument to the function can be duplicated, that is, we do not need to speci...
    2023-11-14 23:00:02 UTC
  • 8.18. Scala function-default parameter value
    Scala can specify the default parameter value for the function parameter, using the default parameter, you do not need...
    2023-11-15 23:00:02 UTC
  • 8.19. Scala function nesting
    We can define the function in the Scala function, and the function defined in the function is called the local functio...
    2023-11-15 23:00:02 UTC
  • 8.20. Scala partial application function
    Scala partial application function is an expression, you do not need to provide all the parameters needed by the funct...
    2023-11-15 23:00:02 UTC
  • 8.21. Scala specifies the function parameter name
    In general, the function call parameters are passed one by one according to the order of the parameters when the funct...
    2023-11-15 23:00:02 UTC
  • 8.22. Scala recursive function
    Recursive functions play an important role in functional programming languages. Scala also supports recursive...
    2023-11-15 23:00:02 UTC
  • 8.23. Scala higher order function
    Higher-Order Function are functions that operate onother functions. Higher-order functions are allowed in Sca...
    2023-11-16 23:00:02 UTC
  • 8.24. Scala anonymous function
    The syntax for defining anonymous functions in Scala is simple, with the argument list on the left side of the arrow a...
    2023-11-16 23:00:02 UTC
  • 8.25. Scala function Corialization (Currying)
    Currying refers to the process of changing a function that originally accepts two parameters into a new function that ...
    2023-11-17 23:00:02 UTC
  • 8.26. Scala closure
    A closure is a function and the return value depends on one or more variables declared outside the function. ...
    2023-11-16 23:00:02 UTC
  • 8.27. Scala string
    The following example assigns a string to a constant: 8.27.1. Example # ...
    2023-11-16 23:00:02 UTC
  • 8.28. Scala array
    The array provided in the Scala language is used to store fixed-size elements of the same type, and the array is one o...
    2023-12-11 00:55:01 UTC
  • 8.29. Scala Collection
    Scala provides a good set of collection implementations, providing some abstractions of collection types. Sca...
    2023-11-17 23:00:02 UTC
  • 8.30. Scala List
    Scala lists are similar to arrays in that all elements are of the same type,but they are also different: lists are imm...
    2023-11-20 23:00:02 UTC
  • 8.31. Scala Set
    Scala set (collection) is a collection of objects without repetition, and all elements are u...
    2023-11-20 23:00:02 UTC
  • 8.32. Scala Mapping
    mapping is an iterative key-value pair (key/value) structure. All values can be obtained by key. The...
    2023-11-20 23:00:02 UTC
  • 8.33. Scala tuple
    Like lists, tuples are immutable, but unlike lists, tuples can contain different types of elements. The value...
    2023-11-20 23:00:02 UTC
  • 8.34. Scala Option
    The Scala Option (option) type is used to indicate that a value is optional (with or without value). ...
    2023-11-20 23:00:02 UTC
  • 8.35. Scala classes and objects
    A class is an abstraction of an object, and an object is a concrete instanceof a class. Classes are abstract and do no...
    2023-11-21 23:00:02 UTC
  • 8.36. Scala Iterator
    Scala Iterator is not a collection, it is a method for accessing the collection. It...
    2023-11-20 23:00:02 UTC
  • 8.37. Scala Trait
    Scala Trait (characteristic) is equivalent to the interface of Java, but it is actually more powerful than the interfa...
    2023-11-21 23:00:03 UTC
  • 8.38. Scala pattern matching
    Scala provides a powerful pattern matching mechanism and has a wide range ofapplications. A pattern match con...
    2023-11-21 23:00:02 UTC
  • 8.39. Scala regular expression
    Scala passed scala.util.matching in the bag Regex class to support...
    2023-11-22 23:00:03 UTC
  • 8.40. Scala exception handling
    Scala’s exception handling is similar to other languages such as Java. Scala’s method can terminate the execu...
    2023-11-21 23:00:02 UTC

Principles and Applications of WebGIS  37

IT Tools  337

Web Frameworks  49

Principles, Technologies, and Methods of Geographic Information Systems  102

In recent years, Geographic Information Systems (GIS) have undergone rapid development in both theoretical and practical dimensions. GIS has been widely applied for modeling and decision-making support across various fields such as urban management, regional planning, and environmental remediation, establishing geographic information as a vital component of the information era. The introduction of the “Digital Earth” concept has further accelerated the advancement of GIS, which serves as its technical foundation. Concurrently, scholars have been dedicated to theoretical research in areas like spatial cognition, spatial data uncertainty, and the formalization of spatial relationships. This reflects the dual nature of GIS as both an applied technology and an academic discipline, with the two aspects forming a mutually reinforcing cycle of progress.

WEB Technology  258

Systems  232

Programming Language  353