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6 min readCodable is a protocol introduced in Swift 4 that allows for easy encoding and decoding of Swift types to and from external representations, such as JSON. It provides a convenient way to handle JSON serialization and deserialization without having to manually write parsing code.To work with Codable for JSON encoding and decoding in Swift, follow these steps:Define a Swift structure or class that conforms to the Codable protocol.
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10 min readThe Chande Momentum Oscillator (CMO) is a technical analysis tool that helps traders and analysts measure the momentum of a financial instrument. It was developed by Tushar Chande and is primarily used to identify overbought and oversold conditions in the market.The CMO is calculated based on the difference between the sum of gains and losses over a specified period.
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9 min readJSON is a popular format used for exchanging data between a client and a server. In Swift, handling JSON parsing involves converting JSON data into native data types that can be easily manipulated within the app. Here's how JSON parsing can be handled in Swift:Import the Foundation framework: JSON parsing in Swift requires using the Foundation framework, so make sure to import it at the top of your Swift file.
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7 min readWorking with date and time in Swift involves using the built-in Date and Calendar classes, along with several other helper classes and methods. Here are the key aspects involved:Creating a Date: The Date class represents a specific point in time. It can be created using the current date or by specifying a specific date and time. Formatting a Date: To display a date in a human-readable format, you can use the DateFormatter class.
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10 min readThe Commodity Channel Index (CCI) is a technical indicator that was developed by Donald Lambert in 1980. It is widely used in technical analysis to identify overbought and oversold levels as well as potential trend reversals in various financial markets.The CCI is calculated by measuring the distance between the current price and its average over a specified period, usually 20 or 14 days.
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6 min readIn Swift, it is possible to create and use custom operators, which are not built-in operators provided by the Swift language. Custom operators can be useful for expressing ideas in a more readable and concise way, enabling developers to define their own syntax. Here is how you can create and use custom operators in Swift:Defining Custom Operators: To define a custom operator, you need to provide the operator's type, precedence, and associativity.
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10 min readThe Arms Index, also known as the Trading Index (TRIN), is a technical analysis tool used by traders and investors to measure the overall market sentiment. It provides insights into the strength and direction of the stock market by comparing the number of advancing and declining stocks to the volume of shares traded.To read the Arms Index (TRIN), you need to understand two main components - advancing/declining issues ratio and advancing/declining volume ratio.
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9 min readProperty observers in Swift allow you to observe changes in a property's value and take appropriate action when the value changes. There are two types of property observers: willSet and didSet.willSet is called just before the value is about to change, allowing you to observe and potentially modify the new value before it is assigned to the property. It is defined using the keyword willSet followed by a code block in brackets.
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7 min readIn Swift, computed properties provide an alternative to stored properties. They don't store a specific value but calculate it dynamically based on other properties or variables. Here's how you can use computed properties in Swift:Declaring computed properties: To declare a computed property, use the var keyword (for read-write properties) or let keyword (for read-only properties) followed by the property name. Getters and setters: Computed properties have a getter and an optional setter.
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10 min readThe Guide to Moving Min is a method for calculating moving minimum (Min) values. Moving minimum refers to finding the smallest value within a certain range in a given dataset.To begin with, the dataset is divided into smaller sections or windows, and the moving minimum is calculated for each window. The window size or length is predetermined and can vary depending on the specific application or analysis.
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7 min readOption sets are an essential feature in Swift that allows you to define and work with custom sets of related options or flags. They provide a flexible and type-safe way to manipulate multiple options simultaneously.To work with option sets in Swift, you need to define an enumeration using the OptionSet protocol. This protocol requires you to specify a raw value type, typically an integer, that represents each option in the set.