List Capacity vs Count

 That's correct! In the .NET framework, the List<T> class is implemented as an array that grows dynamically as items are added to it. The Capacity property represents the size of the underlying array, and the Count property represents the number of items that have been added to the list.

When you add an item to the list and the list is already at capacity, the List<T> class will automatically double the size of the underlying array and copy all of the items from the old array to the new one. This process is known as "resizing the array."

It's important to note that the Capacity property is not the same as the Count property. The Capacity property represents the size of the underlying array, while the Count property represents the number of items that have been added to the list. The Count property will always be less than or equal to the Capacity property.

For example, if you have a list with a capacity of 10 and you add 5 items to it, the Count property will be 5 and the Capacity property will be 10. If you then add another item to the list, the list will automatically resize the array and the Capacity property will be increased to 20. However, the Count property will still be 6.

Dependency Injection (DI)

The Dependency Injection pattern is a particular implementation of Inversion of Control. Inversion of Control (IoC) means that objects do not create other objects on which they rely to do their work. Instead, they get the objects that they need from an outside source (for example, an xml configuration file).



Dependency Injection (DI) means that this is done without the object intervention, usually by a framework component that passes constructor parameters and set properties.



The advantages of using Dependency Injection pattern and Inversion of Control are the following:

• Reduces class coupling
• Increases code reusing
• Improves code maintainability
• Improves application testing
  
  The principle say that "High level module should not depend upon the low level module, both should depend on abstraction. Details should depends upon abstraction". 
  
  
  

  Basically, instead of having your objects creating a dependency or asking a factory object to make one for them, you pass the needed dependencies in to the constructor or via property setters, and you make it somebody else's problem (an object further up the dependency graph, or a dependency injector that builds the dependency graph). A dependency as I'm using it here is any other object the current object needs to hold a reference to. One of the major advantages of dependency injection is that it can make testing lots easier. Suppose you have an object which in its constructor does something like: public SomeClass() { myObject = Factory.getObject(); } This can be troublesome when all you want to do is run some unit tests on SomeClass, especially if myObject is something that does complex disk or network access. So now you're looking at mocking myObject but also somehow intercepting the factory call. Hard. Instead, pass the object in as an argument to the constructor. Now you've moved the problem elsewhere, but testing can become lots easier. Just make a dummy myObject and pass that in. The constructor would now look a bit like: public SomeClass (MyClass myObject) { this.myObject = myObject; }

C# DateTime from Excel turns into float number

 In Excel, dates and times are stored as a floating point number representing the number of days since the epoch date of January 1, 1970. This means that when you read a date or time value from an Excel file into a C# DateTime object, you will need to convert the floating point value to a DateTime object.

Here is an example of how you could do this in C#:

// Assume that the Excel date value is stored in a variable called "excelDate" // Convert the Excel date value to a DateTime object DateTime dateTime = DateTime.FromOADate(excelDate); // You can also use the following syntax to achieve the same result: // DateTime dateTime = new DateTime((long)(excelDate * 86400000) + new DateTime(1970, 1, 1).Ticks);

In this example, the FromOADate method is used to convert the Excel date value to a DateTime object. This method is part of the System.DateTime struct and takes a floating point value representing the number of days since the epoch date.

Alternatively, you can use the Ticks property of the DateTime struct and some simple math to convert the Excel date value to a DateTime object. In this case, the value is first converted to a number of ticks (multiplying it by the number of ticks per day), and then the resulting ticks are

How to make sure unmanaged memory release .net core ?

 In .NET Core, unmanaged memory is typically allocated and released through the use of pointers and the Marshal.AllocHGlobal and Marshal.FreeHGlobal methods. These methods are part of the System.Runtime.InteropServices namespace and are used to allocate and release unmanaged memory in the global heap.

To ensure that unmanaged memory is properly released, you should make sure to call the FreeHGlobal method when you are finished using the memory. You can do this in a finally block to ensure that the memory is released even if an exception is thrown. Here is an example of how you might use these methods to allocate and release unmanaged memory in .NET Core:

using System; using System.Runtime.InteropServices; namespace UnmanagedMemoryExample { class Program { static void Main(string[] args) { // Allocate unmanaged memory IntPtr ptr = Marshal.AllocHGlobal(1024); try { // Use the unmanaged memory here... } finally { // Release the unmanaged memory Marshal.FreeHGlobal(ptr); } } } }

Note that you should only use the global heap for small blocks of memory that are needed for a short period of time. For larger blocks of memory or for memory that is needed for a longer period of time, you should consider using the Marshal.AllocCoTaskMem method or creating a managed wrapper class that can be used to manage the memory.

It is also a good idea to use the using statement whenever possible to automatically release resources when they are no longer needed. This can help simplify your code and reduce the chances of resource leaks.

linq query to get maximum salary in employee list object

 Here is an example of how you could use LINQ (Language Integrated Query) to get the maximum salary in a list of employee objects in C#:

  using System.Linq;

// Assume that the list of employees is stored in a variable called "employees"

// Get the maximum salary from the list of employees

decimal maxSalary = employees.Max(e => e.Salary);

// You can also use the following syntax to achieve the same result:

// decimal maxSalary = (from e in employees select e.Salary).Max();

In this example, the Max method is used to get the maximum salary from the list of employees. The method takes a lambda expression that specifies the property to use for the comparison (in this case, the Salary property).

Alternatively, you can use a LINQ query to achieve the same result. The query uses the from and select clauses to specify the source collection and the property to select, and the Max method is used to get the maximum value.

Note that this code assumes that the employees list and the Employee class have already been defined and that the Employee class has a Salary property of type decimal. You will need to modify the code to match the structure of your own data.

How I can track shopify customer data journey for my own website to present right offers to customer ?

 There are several ways you can track customer data and use it to present personalized offers to customers on your Shopify website:

1. Use the Shopify Customer API: This API allows you to retrieve information about customers, including their purchase history, and use it to create personalized offers.

2. Use Shopify's built-in customer segments: You can use Shopify's built-in customer segments to segment your customers based on various criteria, such as location or purchase history, and then use this information to create personalized offers.

3. Use a customer data platform (CDP): A CDP is a software platform that allows you to collect, manage, and activate customer data across multiple channels and devices. With a CDP, you can create customer profiles that include data from multiple sources, such as online and offline interactions, and use this information to create personalized offers.

4. Use a marketing automation tool: Marketing automation tools allow you to automate your marketing campaigns and send personalized emails to customers based on their behavior and interests. You can use these tools to create targeted email campaigns and present personalized offers to customers.

Regardless of which approach you choose, it's important to ensure that you are complying with data privacy laws and regulations, such as the General Data Protection Regulation (GDPR) and the California Consumer Privacy Act (CCPA). You should also make sure to obtain customer consent before collecting and using their personal data.

How I can generate more leads for my hotel booking through using digital channels ?

There are several ways you can generate leads for your hotel booking through digital channels:

1.       Optimize your website: Make sure that your website is up-to-date and easy to navigate, as this will help to attract more visitors and convert them into leads.

 

2.       Use social media: Use social media platforms such as Facebook, Instagram, and Twitter to promote your hotel and its services. Make sure to post regular updates and engage with your followers to build a community around your brand.

 

3.       Use email marketing: Use email marketing to reach out to potential guests and promote your hotel's services. Make sure to segment your email list and personalize your emails to increase their effectiveness.

 

4.       Use paid advertising: Consider using paid advertising platforms such as Google AdWords and Facebook Ads to reach a wider audience and drive more traffic to your website.

 

5.       Optimize for search engines: Make sure that your website is optimized for search engines so that it appears at the top of search results when people search for hotels in your area. This can be done through search engine optimization (SEO) techniques such as keyword research and on-page optimization.

 

6.       Offer special deals and promotions: Consider offering special deals and promotions to attract potential guests and encourage them to book with you.

 

7.       Collaborate with local businesses and tourist attractions: Partner with local businesses and tourist attractions to offer package deals and attract more visitors to your area.

 

8.       Use online travel agencies (OTAs): Consider listing your hotel on online travel agencies (OTAs) such as Expedia and Booking.com, as these platforms can help you reach a wider audience and generate more leads.

 

By following these strategies, you should be able to generate more leads for your hotel booking through digital channels.