Posts (page 65)
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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.
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8 min readThe Detrended Price Oscillator (DPO) is a technical analysis tool used in trading to identify short-term cycles. It is designed to remove long-term trends from the price action in order to focus solely on short-term market cycles. The main purpose of the DPO is to determine overbought or oversold conditions in the market.Unlike other oscillators that are based on moving averages, the DPO calculates the difference between a past price and the price that existed a specified number of periods ago.
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5 min readTo find the next weekday or weekend using Swift, you can use the Calendar and DateComponents classes. Here's a text explanation of how you can achieve this:First, create an instance of Calendar to work with: let calendar = Calendar.current To find the next weekday:Get the current date: let currentDate = Date() Use the dateComponents(_:from:to:) method to calculate the difference in days between the current date and the next weekday: var components = DateComponents() components.
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4 min readTo change the format of a substring in Swift, you can perform various operations such as concatenation, transformation, and replacement. Here are a few common techniques:Concatenation: You can concatenate substrings with other strings using the + operator or the String initializer.
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7 min readThe Hull Moving Average (HMA) is a popular and widely used technical indicator in trading. It is designed to provide a more accurate representation of market trends compared to traditional moving averages. For beginners, understanding and interpreting the HMA can be a valuable tool for analyzing price movements and making informed trading decisions.The HMA is calculated based on the weighted moving average of a given period.
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4 min readTo change the background of a button in Swift, you can use the setBackgroundImage method. Here's how you can do it:Create a button: Start by creating a button either programmatically or through the storyboard. Create an image: Next, create an image that you want to set as the background for the button. This can be a solid color, a gradient, or an image file. Set the button's background image: Use the setBackgroundImage method on your button instance to set the background image.
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7 min readKeltner Channels is a technical analysis tool used by traders and investors to identify trends and potential reversal points in the financial markets. This indicator consists of three lines plotted on a price chart: the middle line, the upper band, and the lower band.The middle line of the Keltner Channels is typically a moving average, commonly the 20-day Exponential Moving Average (EMA).
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7 min readTo hide the height of a UITableView when a button is clicked in Swift, you can do the following:Create an outlet for the UITableView and connect it to your storyboard or XIB file. @IBOutlet weak var tableView: UITableView! Create an outlet for the UIButton and connect it to your storyboard or XIB file. @IBOutlet weak var button: UIButton! In your ViewController, set the delegate and dataSource of the UITableView to self. override func viewDidLoad() { super.viewDidLoad() tableView.
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5 min readTo get the first two elements of a stack in Swift, you can use the pop() method in a loop. Here is an example of how you can achieve this: var stack = Stack<Int>() // Assuming you have implemented a stack data structure // Push some elements onto the stack stack.push(1) stack.push(2) stack.push(3) stack.push(4) stack.push(5) var firstTwoElements: [Int] = [] // Pop the first two elements from the stack for _ in 0..<2 { if let element = stack.pop() { firstTwoElements.