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Modified JSON Sheet.

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CSnap 2023-11-19 08:07:38 +00:00
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JSON.md
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@ -32,47 +32,47 @@
} }
``` ```
## 1. Introduction to JSON ## Introduction to JSON
- JSON stands for **JavaScript Object Notation**. - JSON stands for **JavaScript Object Notation**.
- It is a lightweight data interchange format. - It is a lightweight data interchange format.
- JSON is language-independent and easy for humans to read and write. - JSON is language-independent and easy for humans to read and write.
- Commonly used for data exchange between a server and web application, as well as for configuration files. - Commonly used for data exchange between a server and web application, as well as for configuration files.
## 2. JSON Data Types ## JSON Data Types
### 2.1 String ### String
- Represents a sequence of characters. - Represents a sequence of characters.
- Enclosed in double quotes. - Enclosed in double quotes.
- Example: `"Hello, World!"` - Example: `"Hello, World!"`
### 2.2 Number ### Number
- Represents a numerical value (integer or floating-point). - Represents a numerical value (integer or floating-point).
- Example: `42` or `3.14` - Example: `42` or `3.14`
### 2.3 Boolean ### Boolean
- Represents a logical value, either `true` or `false`. - Represents a logical value, either `true` or `false`.
### 2.4 Array ### Array
- Ordered list of values. - Ordered list of values.
- Enclosed in square brackets `[]`. - Enclosed in square brackets `[]`.
- Example: `[1, 2, "three", true]` - Example: `[1, 2, "three", true]`
### 2.5 Object ### Object
- Unordered collection of key-value pairs. - Unordered collection of key-value pairs.
- Enclosed in curly braces `{}`. - Enclosed in curly braces `{}`.
- Example: `{"name": "John", "age": 30, "city": "New York"}` - Example: `{"name": "John", "age": 30, "city": "New York"}`
### 2.6 Null ### Null
- Represents a null or empty value. - Represents a null or empty value.
## 3. JSON Syntax ## JSON Syntax
- Data is represented in key-value pairs. - Data is represented in key-value pairs.
- Keys are always strings and followed by a colon. - Keys are always strings and followed by a colon.
@ -80,7 +80,7 @@
- Objects are enclosed in curly braces `{}`. - Objects are enclosed in curly braces `{}`.
- Arrays are enclosed in square brackets `[]`. - Arrays are enclosed in square brackets `[]`.
## 4. JSON Example ## JSON Example
```json ```json
{ {
@ -114,7 +114,7 @@ with open('output.json', 'w') as json_file:
json.dump(data_to_write, json_file, indent=4) json.dump(data_to_write, json_file, indent=4)
``` ```
## 6. Accessing JSON Data in JavaScript ## Accessing JSON Data in JavaScript
```javascript ```javascript
// Assuming jsonString is a JSON string // Assuming jsonString is a JSON string
@ -125,7 +125,7 @@ console.log(jsonData.name); // Outputs: John Doe
console.log(jsonData.address.city); // Outputs: Anytown console.log(jsonData.address.city); // Outputs: Anytown
``` ```
## 7. Accessing JSON Data in PHP ## Accessing JSON Data in PHP
```php ```php
// Assuming jsonString is a JSON string // Assuming jsonString is a JSON string