freelanceshack.com
-
5 min readIn Swift, inheritance allows a class to inherit properties, methods, and other characteristics from another class. To inherit a class in Swift, you need to follow these steps:Define a new class and specify the superclass you want to inherit from using the colon (:) notation. class MyClass: Superclass { // class definition } Add any additional properties and methods specific to your subclass after the class declaration.
-
6 min readTo create and use classes in Swift, you can follow these steps:Define a class: Start by using the class keyword followed by the name of the class. For example, class MyClass. Add properties: Inside the class, declare the properties with their types. Properties represent the characteristics or attributes of an object. For instance, var name: String declares a property named name of type String. Add methods: Methods define the behavior of the class.
-
12 min readThe Mass Index (MI) is a technical indicator used in financial analysis to identify potential reversals in the price trend of a stock or other financial instrument. It was developed by Donald Dorsey in 1992.To read the Mass Index, you need to understand two components: the high-low range period (typically 9) and the Mass Index period (typically 25). The high-low range period calculates the difference between the high and low prices over a specified number of periods.
-
7 min readIn Swift, closures are self-contained blocks of functionality that can be assigned to variables or passed as arguments to functions and methods. They capture and store references to any constants and variables from the context in which they are defined, effectively creating a "closure" around those captured values.To use closures in Swift, here are a few key points to keep in mind:Closure Syntax: Swift provides a concise syntax for writing closures.
-
8 min readThe Rate of Change (ROC), also known as the momentum indicator, is a mathematical tool used to measure the speed at which a variable changes over a specific period of time. It assesses the percentage change in a variable relative to its original value.To calculate the ROC, follow these steps:Select a specific time period over which you want to calculate the rate of change. This could be days, weeks, months, etc.
-
5 min readWorking with dictionaries in Swift allows you to store and retrieve data using key-value pairs. It gives you a way to organize and manipulate data efficiently.
-
6 min readWhen working with Swift, it is essential to handle errors gracefully to avoid crashes or unexpected behavior in your applications. Error handling in Swift involves using the do-catch statement, which allows you to catch and handle errors that may occur during the execution of your code. Here are the key aspects of error handling in Swift:Throw: To indicate an error has occurred, you can use the throw keyword followed by an error object.
-
4 min readThe Rate of Change (ROC) is a commonly used technical indicator that measures the speed at which a variable - typically the price of a financial asset - is changing over a specified period of time. The ROC can provide valuable insights into the momentum or strength of a trend.To calculate the ROC, you need two key pieces of information: the current value of the variable and its value at a previous point in time. The calculation involves comparing the percentage change between the two values.
-
6 min readGuard statements in Swift are control flow statements that are used to ensure certain conditions are met in order for the code to continue executing. They provide an early exit from a block of code if the specified condition evaluates to false or nil.The structure of a guard statement consists of the keyword "guard" followed by a condition that needs to be checked. If this condition evaluates to false or nil, the code block following the guard statement is exited immediately.
-
12 min readThe Triangular Moving Average (TMA) is a popular technical analysis tool used by traders to smooth out price data and identify trends. It is similar to other moving averages, but it assigns more weightage to the recent prices, making it more responsive to price changes. TMA is particularly useful for traders looking for a smoother moving average that reduces noise and provides a clearer view of the direction of the market.
-
7 min readTo unwrap optionals safely in Swift, you can follow these guidelines:Using if let: The if let statement allows you to unwrap an optional value safely within a conditional block. If the optional has a value, it gets assigned to a constant or variable, and you can use it within the block. If the optional is nil, the block is not executed.