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Mak

@makolyte

I write about coding problems (mostly C#) and mentor other devs

makolyte.com
Joined November 2019
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Code article C# - How to use Polly to do retries #dotnet #coding makolyte.com/csharp-how-to-u…

C# - How to use Polly to do retries | makolyte

Whenever you’re dealing with code that can run into transient errors, it’s a good idea to implement retries. Transient errors, by definition, are temporary and subsequent attempts should succeed.

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C# – Using a dictionary with tuples #csharp #dotnet #coding makolyte.com/csharp-using-a-…

C# - Using a dictionary with tuples | makolyte

You can use dictionaries with tuples as the keys or values. I’ll show examples below. Tuples have two or more fields, so using a tuple as the key is a simple way to have compound keys in a dictionary.

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C# – Copy a dictionary #csharp #dotnet #coding makolyte.com/csharp-copy-a-d…

C# - Copy a dictionary | makolyte

The simplest way to make a copy of a dictionary is to use the copy constructor. You pass the dictionary you want to copy to the new dictionary’s constructor, like this: Note: If you’re using a non…

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C# – Convert a dictionary to a list #csharp #dotnet #coding makolyte.com/csharp-convert-…

C# - Convert a dictionary to a list | makolyte

The simplest way to convert a dictionary to a list is by using the Linq ToList() method, like this: When used on a dictionary, ToList() returns a list of KeyValuePair objects. This example outputs...

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C# – Deserialize JSON to a dictionary #csharp #dotnet #coding makolyte.com/csharp-deserial…

C# - Deserialize JSON to a dictionary | makolyte

I’ll show examples of how to deserialize JSON to dictionaries in different scenarios. When your JSON object has properties with simple string values (as opposed to nested objects)…

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C# – Serialize a dictionary to JSON #csharp #dotnet #coding makolyte.com/csharp-serializ…

C# - Serialize a dictionary to JSON | makolyte

When you want to convert a dictionary to a JSON string, you can use the built-in JsonSerializer (from System.Text.Json) to serialize the dictionary. Here’s an example: Note: This is passing in…

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C# – Check if a value exists in dictionary #csharp #dotnet makolyte.com/csharp-check-if…

C# - Check if a value exists in dictionary | makolyte

Normally you’d check if a dictionary contains a key or get a value by key. But you can also check if the dictionary contains a specific value by using Dictionary.ContainsValue(). Here’s an example…

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C# – Find duplicate values in a dictionary #csharp #dotnet #coding makolyte.com/csharp-find-dup…

C# - Find duplicate values in a dictionary | makolyte

Dictionaries contain key/value pairs. The keys must be unique, but the values can be repeated many times. When you want to find duplicate values, the simplest option is to use Linq methods GroupBy()…

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C# – Update value in a dictionary #csharp #dotnet #coding makolyte.com/csharp-update-v…

C# - Update value in a dictionary | makolyte

After you add a key/value pair to a dictionary, you can update the value for the key by using the indexer syntax (i.e. dictionary[key]=value), like this: This outputs the updated value for the ‘Bob’…

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C# – Get dictionary key by value #csharp #dotnet #coding makolyte.com/csharp-get-dict…

C# - Get dictionary key by value | makolyte

Dictionaries have keys mapped to values, which enables you to efficiently lookup values by key. But you can also do a reverse lookup: get the key associated with a value. The simplest option is to...

makolyte.com
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C# – Check if key exists in dictionary #csharp #dotnet #coding makolyte.com/csharp-check-if…

C# - Check if key exists in dictionary | makolyte

When you want to check if a key exists, use Dictionary.ContainsKey(). This returns true if the key exists and otherwise returns false. Here’s an example: This initializes the dictionary with a few…

makolyte.com
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C# – Remove items from dictionary #csharp #dotnet #coding makolyte.com/csharp-remove-i…

C# - Remove items from dictionary | makolyte

Dictionaries contain key/value pairs. When you want to remove one or more items from a dictionary, you can use one of the following methods: I’ll show examples below. Use Dictionary.Remove() to...

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C# - Remove items from dictionary #csharp #dotnet #coding makolyte.com/csharp-remove-i…

C# - Remove items from dictionary | makolyte

Dictionaries contain key/value pairs. When you want to remove one or more items from a dictionary, you can use one of the following methods: I’ll show examples below. Use Dictionary.Remove() to...

makolyte.com
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How do I teach my body that my fight or flight response is supposed to be for life or death situations, not running an SQL query in production
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C# – Remove items from dictionary #csharp #dotnet #coding makolyte.com/csharp-remove-i…

C# - Remove items from dictionary | makolyte

Dictionaries contain key/value pairs. When you want to remove one or more items from a dictionary, you can use one of the following methods: I’ll show examples below. Use Dictionary.Remove() to...

makolyte.com
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C# - Get value from dictionary #csharp #dotnet #coding makolyte.com/csharp-get-valu…

C# - Get value from dictionary | makolyte

Dictionaries store key/value pairs. When you want to get the value for a key, you can use the indexer syntax and specify the key, like this: Note: In order to show how to get a value…

makolyte.com
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C# – Add to a dictionary #csharp #dotnet #coding makolyte.com/csharp-add-to-a…

C# - Add to a dictionary | makolyte

The simplest way to add a key/value pair to a dictionary is by using Dictionary.Add(), like this: If the key already exists, Dictionary.Add() throws an ArgumentException because the key must be...

makolyte.com
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C# - Get temp folder path and create a temp file #csharp #dotnet #coding makolyte.com/csharp-get-temp…

C# - Get temp folder path and create a temp file | makolyte

You can use Path.GetTempPath() to get the user’s temp folder path and then create a temp file in it. Alternatively, use the shortcut Path.GetTempFileName().

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C# – Validate an IP address #csharp #dotnet #coding makolyte.com/csharp-validate…

C# - Validate an IP address | makolyte

Shows how to use the IPAddress class to parse and validate an IP Address string. Also shows how to specifically validate an IPv4 address in the 3-dot format

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Always be refactoring. As the saying goes: make haste slowly. By investing in good design continuously, you go faster in the long run.
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C# – Get all files in a folder #csharp #dotnet #coding makolyte.com/csharp-get-all-…

C# - Get all files in a folder | makolyte

Examples of getting files from a folder with Directory.GetFiles() and Directory.EnumerateFiles(), including from subfolders. Also shows how to get file names.

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