java script json
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JSON is a lightweight data format used to store and transport data between a server and web page. It stands for JavaScript Object Notation. JSON syntax follows JavaScript object syntax rules - data is in name/value pairs within curly braces for objects and square brackets for arrays. When exchanging data between a browser and server, it can only be text, so JSON text can be converted to JavaScript objects on the browser and back, allowing work with data as JavaScript objects without parsing. Arrays in JSON hold multiple objects within square brackets.
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![JSON Arrays
JSON arrays are written inside square brackets.
Just like in JavaScript, an array can contain objects:
"employees":[
{"firstName":"John", "lastName":"Doe"},
{"firstName":"Anna", "lastName":"Smith"},
{"firstName":"Peter", "lastName":"Jones"}
]](https://image.slidesharecdn.com/8-200504071148/85/java-script-json-8-320.jpg)
![Converting a JSON Text to a
JavaScript Object
A common use of JSON is to read data from a web server, and display
the data in a web page.
For simplicity, this can be demonstrated using a string as input.
First, create a JavaScript string containing JSON syntax:
var text = '{ "employees" : [' +
'{ "firstName":"John" , "lastName":"Doe" },' +
'{ "firstName":"Anna" , "lastName":"Smith" },' +
'{ "firstName":"Peter" , "lastName":"Jones" } ]}';
Then, use the JavaScript built-in function JSON.parse() to convert the
string into a JavaScript object:
var obj = JSON.parse(text);](https://image.slidesharecdn.com/8-200504071148/85/java-script-json-9-320.jpg)
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JSP Client Requestchauhankapil The document discusses JSP client requests and the information contained in the request header and available methods. It describes several common header fields sent by the client browser including Accept, Accept-Encoding, Accept-Language, Authorization, Connection, Content-Length, Cookie, and Host. It also lists and briefly describes several methods that can be used to access elements of the client request, including getCookies(), getAttributeNames(), getSession(), getMethod(), getPathInfo(), and getProtocol(). The document is intended to explain JSP client requests and provide details on the request header and available methods to the reader.
Jsp server response
Jsp server responsechauhankapil This document discusses JSP server responses, including an example response format. It then describes several common response headers like Cache-Control, Connection, Expires, and Location. Finally, it lists some JSP methods for manipulating responses, such as encodeRedirectURL(), containsHeader(), addCookie(), and reset().
Markov decision process
Markov decision processchauhankapil Markov Decision Process (MDP) is a reinforcement learning model that consists of: (1) states, (2) actions, (3) transition models, and (4) rewards. The goal is to find the optimal policy, which maps states to the best actions, in order to maximize long-term rewards. In an MDP, an agent takes an action in a state, then transitions to a new state based on the transition model, and receives an immediate reward.
RNN basics in deep learning
RNN basics in deep learningchauhankapil Recurrent neural networks (RNNs) are a type of neural network that can handle sequential data by saving the output of each layer and feeding it back as input. RNNs were created to address issues with feed-forward neural networks, which cannot handle sequential data, only consider the current input, and cannot memorize previous inputs. RNNs have applications in areas like image captioning, time series prediction, natural language processing, and machine translation.
Introduction to generative adversarial networks (GANs)
Introduction to generative adversarial networks (GANs)chauhankapil Generative adversarial networks (GANs) are a type of deep learning model used for generative modeling. GANs involve training two neural networks - a generator and a discriminator. The generator produces synthetic data while the discriminator evaluates it as real or fake. This adversarial process trains the generator to produce increasingly realistic samples. GANs frame generative modeling as an adversarial game to learn the training data distribution in an unsupervised manner.
Bayesian probabilistic interference
Bayesian probabilistic interferencechauhankapil This document discusses Bayesian networks, which use a directed acyclic graph structure to represent conditional independence relationships between variables and compactly specify joint probability distributions. An example Bayesian network is given showing how the topology encodes that weather is independent of other variables and that toothache and catching a cold are conditionally independent given having a cavity. Reasons for using and learning Bayesian networks are explained, including that they provide an intuitive way to incorporate causal knowledge and allow for efficient inference queries.
Jsp
Jspchauhankapil Java Server Pages (JSP) is a technology that provides a simplified and fast way to create web pages that display dynamically generated content. A JSP page combines static HTML tags with JSP tags that insert Java code. This allows developers to add dynamic functionality to web pages by embedding Java code directly in the HTML. A simple JSP page example prints the current time by embedding a Java statement between <% %> tags in the HTML. JSP pages are translated into Java servlets, so they benefit from the full capabilities of the Java programming language.
Exception handling in java
Exception handling in javachauhankapil This document discusses exception handling in Java. It defines exception handling as a mechanism to handle runtime errors. It describes the two main types of exceptions in Java - checked exceptions which are checked at compile-time, and unchecked exceptions which are checked at runtime. Finally, it provides an example of exception handling in Java using the try, catch, and finally keywords.
Knowledge acquistion
Knowledge acquistionchauhankapil The document discusses knowledge acquisition for artificial intelligence. It defines knowledge acquisition as the process used to define rules and syntax for knowledge-based systems. It also discusses different types of knowledge, including declarative knowledge (knowing facts), procedural knowledge (knowing how to do something), meta knowledge (knowing about other types of knowledge), heuristic knowledge (rules of thumb from experience), and structural knowledge (relationships between concepts). The document provides examples and definitions for each type of knowledge.
Knowledge based system
Knowledge based systemchauhankapil The document discusses knowledge based systems, which use artificial intelligence to solve problems that normally require human expertise by drawing on knowledge captured in a knowledge base. It explains that knowledge based systems typically use rule-based or case-based reasoning and can be used for tasks like classification, diagnosis and planning. The document also outlines the typical components of a knowledge based system like the knowledge base, inference engine and interface, as well as approaches to knowledge representation.
Introduction of predicate logics
Introduction of predicate logicschauhankapil This document introduces predicate logic and its key concepts. It discusses that predicate logic uses predicate symbols to represent relations between objects, with the number of objects defining a predicate's degree. Predicate logic formulas can be joined using logical connectives like negation, conjunction, disjunction, and implication. Quantifiers like universal and existential are used to express properties of object collections. The syntax of predicate logic is inspired by Prolog and uses terms formed from constants, variables, and function symbols, along with quantifiers and sentences. Some useful equivalences for eliminating and distributing quantifiers are also presented. The document concludes by assigning students to describe predicate logic and discuss useful formulas for designing facts.
Types of inheritance in java
Types of inheritance in javachauhankapil There are three types of inheritance in Java: single, multilevel, and hierarchical. Single inheritance allows a child class to inherit from one parent class, as in the example of the Dog class extending the Animal class. Multilevel inheritance allows a grandchild class to inherit from a parent class through a child class, as in the BabyDog class extending Dog and indirectly inheriting from Animal. Hierarchical inheritance allows multiple child classes to inherit from a common parent class, as in both the Dog and Cat classes extending Animal.
Representation of syntax, semantics and Predicate logics
Representation of syntax, semantics and Predicate logicschauhankapil This document discusses different methods for representing syntax, semantics, and predicate logic in natural language processing. It introduces propositional and formal semantics which represent text as logical formulas, as well as vector representations which embed text in multi-dimensional space. Various logical representations are examined including propositional logic, predicate logic, production rules, semantic networks, and description logics.
Inheritance in java
Inheritance in javachauhankapil This document discusses inheritance in Java. It defines key terms like subclass, superclass, and reusability. It explains that a subclass inherits the properties and behaviors of its parent superclass. The syntax for inheritance in Java uses the "extends" keyword. The document provides two code examples to demonstrate inheritance - a Programmer subclass that inherits from an Employee superclass, and a My_Calculation subclass that inherits and extends the Calculation superclass with a new method.
Propositional logic
Propositional logicchauhankapil Propositional logic is the simplest form of logic that uses propositions that are either true or false. A proposition is a declarative statement. Propositional logic represents knowledge using symbolic variables and logical connectors. There are two types of propositions: atomic propositions which are single statements, and compound propositions which combine simpler propositions using logical connectors like AND and OR. Propositional logic is also known as Boolean logic as it uses 1s and 0s to represent true and false values.
Constructors in java
Constructors in javachauhankapil Constructors in Java are special methods that are used to initialize objects. There are two types of constructors: default (no-arg) constructors that take no parameters, and parameterized constructors that allow passing parameters to initialize an object. Constructors must have the same name as the class and cannot have a return type. They are automatically called when an object is created using the new keyword to allocate memory and initialize fields.
Methods in java
Methods in javachauhankapil This document discusses methods in Java. It defines a method as a collection of instructions that performs a specific task and provides code reusability. There are two types of methods in Java: predefined methods and user-defined methods. Predefined methods are methods already defined in Java class libraries that can be directly called, while user-defined methods are written by programmers according to their needs. Examples of both types of methods are provided.
Circular linked list
Circular linked listchauhankapil This document provides an introduction to circular linked lists. It explains that a circular linked list is a variation of a linked list where the first element points to the last element, forming a loop. Both singly and doubly linked lists can be made circular by having the next pointer of the last node point to the first node, and in doubly linked lists the previous pointer of the first node points to the last node. Basic operations like insert, delete, and display are supported. Memory management involves the head pointer storing the address of the first node, and each node storing the address of the next node and last node.
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java script json
- 1. JavaScript JSON Prof. Neeraj Bhargava Kapil Chauhan Department of Computer Science School of Engineering & Systems Sciences MDS University, Ajmer
- 2. JavaScript JSON JSON is a format for storing and transporting data. JSON is often used when data is sent from a server to a web page.
- 3. What is JSON? JSON stands for JavaScript Object Notation JSON is a lightweight data interchange format JSON is "self-describing" and easy to understand
- 4. Exchanging Data When exchanging data between a browser and a server, the data can only be text. JSON is text, and we can convert any JavaScript object into JSON, and send JSON to the server. We can also convert any JSON received from the server into JavaScript objects. This way we can work with the data as JavaScript objects, with no complicated parsing and translations.
- 5. JSON Syntax Rules Data is in name/value pairs Data is separated by commas Curly braces hold objects Square brackets hold arrays
- 6. JSON Data - A Name and a Value JSON data is written as name/value pairs, just like JavaScript object properties. A name/value pair consists of a field name (in double quotes), followed by a colon, followed by a value: "firstName":"John"
- 7. JSON Objects JSON objects are written inside curly braces. Just like in JavaScript, objects can contain multiple name/value pairs: {"firstName":"John", "lastName":"Doe"}
- 8. JSON Arrays JSON arrays are written inside square brackets. Just like in JavaScript, an array can contain objects: "employees":[ {"firstName":"John", "lastName":"Doe"}, {"firstName":"Anna", "lastName":"Smith"}, {"firstName":"Peter", "lastName":"Jones"} ]
- 9. Converting a JSON Text to a JavaScript Object A common use of JSON is to read data from a web server, and display the data in a web page. For simplicity, this can be demonstrated using a string as input. First, create a JavaScript string containing JSON syntax: var text = '{ "employees" : [' + '{ "firstName":"John" , "lastName":"Doe" },' + '{ "firstName":"Anna" , "lastName":"Smith" },' + '{ "firstName":"Peter" , "lastName":"Jones" } ]}'; Then, use the JavaScript built-in function JSON.parse() to convert the string into a JavaScript object: var obj = JSON.parse(text);
- 10. Assignment Explain JavaScript JSON with example and describe following Syntax rule Exchanging data JSON Array