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8 min readIn Swift, decoding nested JSON data involves several steps. Here's a step-by-step guide on how to decode nested JSON in Swift:Define a struct or class that represents the structure of your JSON data.Ensure that your struct or class conforms to the Codable protocol. This allows Swift's JSONDecoder to convert JSON data into instances of your custom type.Identify the nested JSON objects or arrays within your JSON data.
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9 min readThe Arms Index, also known as TRIN (short for Trading Index), is a technical indicator used by traders and investors to gauge the overall market sentiment or the strength of a particular market trend. It was developed by Richard Arms, Jr. in the 1960s.The Arms Index is calculated by dividing the number of advancing (or up) stocks by the number of declining (or down) stocks, and then dividing this ratio by the advancing (or up) volume divided by the declining (or down) volume.
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5 min readDecoding bytes to a string in Swift can be achieved using the String initializer or the String(decoding:as:) method. Here's how it can be done:Using the String initializer: let bytes: [UInt8] = [104, 101, 108, 108, 111] // Example byte array if let decodedString = String(bytes: bytes, encoding: .
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7 min readTo upload an image with a parameter multipart in Swift, you can follow these steps:Create a URLSession and URLRequest to handle the HTTP request: let url = URL(string: "your_upload_url") var request = URLRequest(url: url!) request.httpMethod = "POST" Set the Content-Type header to indicate multipart form data: request.
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9 min readThe Elder-Ray Index is a technical analysis tool developed by Dr. Alexander Elder. It aims to measure buying and selling pressure in a given market by analyzing the relationship between the price and the bulls' and bears' power. This index consists of two components: the Bulls Power and the Bears Power.Bulls Power: This component calculates the difference between the high price and an Exponential Moving Average (EMA) of prices. It represents the strength of the bulls in the market.
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8 min readTo use Swift's async/await in parallel, you can follow these steps:Import the necessary modules: Ensure that you have imported the required modules like Dispatch, AsyncHTTPClient, or any other relevant ones. Define the async functions: Create the necessary async functions that perform the parallel tasks. These functions should have the async keyword before the function definition.
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10 min readThe Triangular Moving Average (TMA) is a technical analysis indicator used by swing traders to identify the trend and potential entry and exit points in a stock or currency pair. It is a smoothed moving average that is calculated by taking the average of the prices over a specific period, with more weight given to the current prices.To use TMA for swing trading, you can follow these steps:Calculate the TMA: Determine the period over which you want to calculate the TMA.
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7 min readTo call Firebase in Swift, follow the steps below:Import Firebase module: import Firebase Initialize Firebase in the AppDelegate.swift file. Add the following code in the didFinishLaunchingWithOptions method: FirebaseApp.configure() Add necessary Firebase frameworks to your project by using CocoaPods or manually downloading and adding them. To use specific Firebase features, import the corresponding Firebase module.
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7 min readTo make async API calls in Swift, you can follow the steps below:Import the necessary frameworks and libraries: Begin by importing Foundation and UIKit (if necessary) frameworks that provide the essential classes and networking capabilities required for making API calls. import Foundation import UIKit Define the API request URL: Set the URL for the API request, which typically includes the endpoint and any required parameters. You can use URLComponents to construct the URL.
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10 min readDay trading involves buying and selling financial instruments within the same trading day to take advantage of short-term price movements. The typical price for day trading can vary greatly depending on various factors.Firstly, the trading platform or brokerage you choose can significantly impact the costs. Some platforms offer commission-free trading, while others charge a commission per trade.
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6 min readTo print the output of a method in a struct using Swift, you can follow these steps:Define a struct: Start by defining a struct that contains the method whose output you want to print. For example, let's say we have a struct called Person: struct Person { func sayHello() -> String { return "Hello.