Posts - Page 49 (page 49)
-
5 min readTo create a time scale in d3.js, you can follow these steps:First, you need to include the d3.js library in your HTML file by including the following script tag: Next, define the dimensions of your time scale, including the range on which your scale will be based. For example, you might have a width of 500 pixels and a height of 300 pixels.
-
6 min readAsynchronous programming in Kotlin involves handling tasks that may not complete immediately. This allows your application to continue executing other tasks while waiting for certain operations to finish, such as network requests or file I/O.There are several ways to handle asynchronous programming in Kotlin:Callbacks: One traditional approach is using callbacks. You can define a function that takes a callback as a parameter, which will be invoked when the asynchronous task completes.
-
8 min readThe Arms Index, also known as the Trading Index (TRIN), is a technical analysis tool used in trading to determine the strength of a particular market trend. It was developed by Richard W. Arms Jr. in the late 1960s.The Arms Index is primarily used to measure the market's breadth and investor sentiment. It takes into account the relationship between advancing and declining stocks and the volume associated with each.
-
8 min readTo convert a complex JSON dataset to be used in d3.js, you can follow these steps:Load the JSON dataset: Use a method like d3.json() to load the JSON dataset from a file or an API endpoint. Parse the JSON data: Once the JSON dataset is loaded, you need to parse it into a JavaScript object using JSON.parse() method. Transform the data: Depending on the structure of your JSON dataset, you may need to transform it to match the requirements of your d3.js visualization.
-
9 min readKotlin's standard library provides a set of scope functions that allow you to easily work with objects and execute code within a specific scope. These functions are: let, run, with, apply, and also.let is used to perform operations on an object and return the result. It can be chained together to perform multiple operations in sequence.run is similar to let but is invoked directly on an object.
-
5 min readCandlestick patterns are a visual representation of price movement in financial markets, commonly used in day trading. They provide valuable insights into market psychology and can help traders make informed decisions about when to enter or exit trades.Each candlestick represents a specified time period, such as one minute or one hour, and consists of four main components: the open, close, high, and low prices.
-
8 min readTo parse a numeric type date in d3.js, you can use the d3.timeParse method. Here's how you can do it:First, you need to define the date format you are working with. For example, if you have a numeric date in the format "yyyyMMdd" (e.g., 20210101), you can define the format as "%Y%m%d". Use the d3.timeParse method to create a parser based on the defined format. For example, if the format is "%Y%m%d", you can create a parser as follows: var parser = d3.
-
8 min readGenerics in Kotlin allow us to write more flexible and reusable functions and classes. They make it possible to create code that can work with different types, without sacrificing type safety. In this guide, we will explore how to create and use generics in Kotlin.To create a generic function or class, we first need to declare the generic type parameters. We use angle brackets (<>) to define the type parameter after the function or class name.
-
8 min readDependency Injection (DI) is a design pattern used to implement loose coupling between software components by allowing objects to be created and managed by an external entity. Kotlin, being a modern language, provides several ways to implement DI in your applications.Constructor Injection: The most commonly used method, where dependencies are provided through a class's constructor.
-
7 min readThe Triple Exponential Average (TRIX) is a technical indicator used in day trading to identify trends and determine buy or sell signals. It is a momentum oscillator that calculates the rate of change of a triple-smoothed moving average.The TRIX indicator works by taking a standard moving average of the price data, then calculating another moving average of the result, and finally, a third moving average of the second moving average.
-
6 min readAnnotations in Kotlin are a mechanism to provide additional meta-information to the code. They can be used to modify the behavior of elements such as functions, classes, properties, or even entire Kotlin files. Here's how you can work with annotations in Kotlin:Declaring Annotations: To declare an annotation, you use the @ symbol followed by the keyword annotation, and the name of the annotation. Annotations can include optional parameters and default values.
-
9 min readThe Elder-Ray Index is a technical analysis tool used in trading to measure the strength of the bulls and bears in the market. It was developed by Alexander Elder and is based on the concept of moving averages and price momentum.The Elder-Ray Index consists of two components: the Bull Power and the Bear Power. Bull Power measures the ability of the bulls to push prices upwards, while Bear Power measures the ability of the bears to push prices downwards.