C# snippets

• Returns true if the provided predicate function returns true for all elements in a collection, false …
• AverageBy Returns the average of a collection, after mapping each element to a value using the provided function. Use … mathlistarraylambdaintermediate
• Bifurcate Splits values into two groups. If an element in filter is true, the corresponding element in the collection … arraylistintermediate
• BifurcateBy Splits values into two groups according to a predicate function, which specifies which group an element in the … arraylistlambdaadvanced
• ByteArrayToHex Converts a byte array to its hexadecimal string representation. Use BitConverter.ToString() to convert the … arrayutilitybeginner
• Capitalize Capitalizes the first letter of a string. Use string.ToCharArray() to convert the string to an array of char, … stringbeginner
• Chunk Chunks a collection into smaller lists of a specified size. Use IEnumerable.Select() to convert the given list … arraylistlambdaadvanced
• CompactWhitespace Returns a string with whitespaces compacted. Use Regex.Replace() with a regular expression to replace all … stringregexintermediate
• CountBy Groups the elements of a collection based on the given function and returns the count of elements in each … arraylistlambdaintermediate
• CountOccurences Counts the occurences of a value in a collection. Use IEnumerable.Count() in combination with … arraylistintermediate
• DayOfTheWeek Returns the string representation of the weekday for the given DateTime. Use DateTime.ToString() with an … dateutilitybeginner
• Decapitalize Decapitalizes the first letter of a string. Use string.ToCharArray() to convert the string to an array of … stringbeginner
• Difference Returns the difference betweend two collections. Use IEnumerable.Except() to only return elements in the … arraylistbeginner
• DifferenceBy Returns the difference between two collections, after applying the provided function to each element of both. … arraylistlambdaadvanced
• DistinctValues Returns all distinct values in a collection. Use IEnumerable.Distinct() to get the distinct values in the … arraylistbeginner
• DuplicateValues Returns all distinct values in a collection. Use IEnumerable.GroupBy() to create groups for each distinct … arraylistintermediate
• Fibonacci Generates an array, containing the Fibonacci sequence, up until the nth term. Starting with 0 and 1, loop from … matharrayintermediate
• FilterString Filter a string’s contents to include only alphanumeric and allowed characters. Use string.ToCharArray() … stringutilityintermediate
• FindFirstBy Returns the first element in a collection that matches the given predicate function, match. Use … arraylistlambdaintermediate
• FindIndexOfAll Returns all indices in an IList that match the given predicate function, match. Use Enumerable.Range() to … arraylistlambdaintermediate
• FindIndexOfFirstBy Returns the first index in an IList that matches the given predicate function, match. Use Enumerable.Range() … arraylistlambdaintermediate
• FindIndexOfLastBy Returns the last index in an IList that matches the given predicate function, match. Use Enumerable.Range() to … arraylistlambdaintermediate
• FindLastBy Returns the last element in a collection that matches the given predicate function, match. Use … arraylistlambdaintermediate
• FindParityOutliers Given a collection, returns the items that are parity outliers. Use IEnumerable.GroupBy() to create groups for … arraylistmathadvanced
• Flatten Flattens a 2D collection into a single dimension. Use IEnumerable.SelectMany() to flatten the 2D enumerable … arraylistintermediate
• FormatDuration Returns the human readable format of the given number of seconds. Use TimeSpan.FromSeconds() to convert the … dateutilitybeginner
• Frequencies Returns a Dictionary with the unique values of a collection as keys and their frequencies as the values. Use … arraylistdictionaryintermediate
• GCD Calculates the greatest common divisor of the given numbers. Define a GCD() function for two numbers, which … mathrecursionoverloadintermediate
• GetFirstN Returns the first n elements in a collection. Use IEnumerable.Count() to check if the enumerable is non-empty. … arraylistintermediate
• GetLastN Returns the last n elements in a collection. Use IEnumerable.Count() to check if the enumerable is non-empty. … arraylistintermediate
• GetType Returns the type of the given object. Use typeof() on the given object’s type. public static partial … utilitytypebeginner
• HaveSameContents Returns true if two collections contain the same elements regardless of order, false otherwise. Use … arraylistdictionaryadvanced
• Head Returns the head of a collection. Use IEnumerable.Count() to check if the enumerable is non-empty. Use … arraylistintermediate
• HexToByteArray Converts a hexadecimal string to a byte array. Use Enumerable.Range() in combination with string.Length to get … stringutilityadvanced
• IndexOfAll Returns all indices of n in an IList. Use Enumerable.Range() to iterate over all indices in data. Use … arraylistintermediate
• Initialize2DArray Initializes a 2D array of the given width, height and value. Use Enumerable.Repeat() to repeat value width … arrayutilityadvanced
• IsA Returns true if the given object is of the specified type, false otherwise. Use the is operator to check if … utilitytypebeginner
• IsContainedIn Returns true if the elements of the first collection are contained in the second one regardless of order, … arraylistdictionaryadvanced
• IsDivisible Checks if the first numeric argument is divisible by the second one. Use the modulo operator (%) to check if … mathbeginner
• IsDouble Returns true if the given string can be parsed into a double, false otherwise. Return the result of calling … mathtypeintermediate
• IsEven Returns true if the given number is even, false otherwise. Check whether a number is odd or even using the … mathbeginner
• IsInteger Returns true if the given string can be parsed into an integer, false otherwise. Return the result of calling … mathtypeintermediate
• IsLower Checks if a string is lower case. Convert the given string to lower case, using string.ToLower() and compare … stringbeginner
• IsNotA Returns true if the given object is not of the specified type, false otherwise. Use the is operator to check … utilitytypebeginner
• IsOdd Returns true if the given number is odd, false otherwise. Check whether a number is odd or even using the … mathbeginner
• IsPowerOfTwo Returns true if the given number is a power of 2, false otherwise. Use the bitwise binary AND operator (&) … mathintermediate
• IsUpper Checks if a string is upper case. Convert the given string to upper case, using string.ToUpper() and compare … stringbeginner
• IsWeekday Returns true if the given DateTime is a weekday, false otherwise. Use DateTime.DayOfWeek to check if the given … dateutilitybeginner
• IsWeekend Returns true if the given DateTime is a not weekday, false otherwise. Use DateTime.DayOfWeek to check if the … dateutilitybeginner
• KeepUpToN Filters a collection keeping up to n occurences of each value. Use IEnumerable.Distinct() in combination with … arraylistintermediate
• LCM Calculates the least common multiple of the given numbers. Define a _GCD() method that determines the greatest … mathrecursionintermediate
• Mask Replaces all but the last n characters in a string with the specified mask character. Use string.Substring() … stringutilityintermediate
• MaxBy Returns the maximum of a collection, after mapping each element to a value using the provided function. Use … mathlistarraylambdaintermediate
• MaxDateTime Returns the maximum of two DateTime values. Use the conditional operator (?:) to return the maximum of the two … datebeginner
• Median Finds the median of a list of numbers. Use the params keyword to accept either an array or a variable number … mathintermediate
• MinBy Returns the minimum of a collection, after mapping each element to a value using the provided function. Use … mathlistarraylambdaintermediate
• MinDateTime Returns the minimum of two DateTime values. Use the conditional operator (?:) to return the minimum of the two … datebeginner
• MostFrequent Returns the most frequent element of a collection. Use IEnumerable.GroupBy() to group values by value. Use … arraylistintermediate
• None Returns true if the provided predicate function returns false for all elements in a collection, false … arraylistlambdaoverloadintermediate
• PadNumber Pads a given number to the specified length. Use Int32.ToString() with an appropriate format specifier, … stringutilitybeginner
• RandomDoubleInRange Returns a random double in the specified range. Use Random.NextDouble() to generate a random value and map it … mathutilityrandombeginner
• RandomIntegerInRange Returns a random integer in the specified range. Use Random.Next() to generate an integer in the desired … mathutilityrandombeginner
• Repeat Creates a new string by repeating the given string n times. Use Enumerable.Repeat() to repeat s n times, … stringbeginner
• Reverse Reverses a string. Use string.ToCharArray() to convert the string to an array of char, Array.Reverse() to … stringbeginner
• Shuffle Randomizes the order of the values of an IList, updating the original IList object. Use the Fisher-Yates … arraylistrandomintermediate
• SplitLines Splits a multiline string into an array of lines. Use string.Split() with all forms of the newline separator … stringbeginner
• SplitStringBy Splits a string into an array of strings using a multicharacter (string) separator. Use string.Split() with … stringutilitybeginner
• Stringify Combines the elements of an enumerable object into a string. Use string.Join() to combine all elements in the … utilityarrayliststringbeginner
• Subarray Returns a subarray of the given array starting at the given index and having the specified length. Use … arrayintermediate
• SumBy Returns the sum of a collection, after mapping each element to a value using the provided function. Use … matharraylistlambdaintermediate
• Swap Swaps the values of two variables of the same type. Pass both values by reference using the ref keyword, then … utilityintermediate
• SymmetricDifference Returns the symmetric difference betweend two collections. Use IEnumerable.Except() to only return elements in … arraylistbeginner
• SymmetricDifferenceBy Returns the symmetric difference betweend two collections, after applying the provided function to each … arraylistlambdaadvanced
• Tail Returns the tail of a collection. Use IEnumerable.Count() to check if the enumerable is non-empty. Use … arraylistbeginner
• ToCamelCase Converts a string to camel case. Use Regex.Matches() with an appropriate regular expression to break the … stringregexadvanced
• ToKebabCase Converts a string to kebab case. Use Regex.Matches() with an appropriate regular expression to break the … stringregexintermediate
• Tomorrow Returns tomorrow’s DateTime value. Use DateTime.Now to get the current date, then use … datebeginner
• ToSnakeCase Converts a string to snake case. Use Regex.Matches() with an appropriate regular expression to break the … stringregexintermediate
• ToTitleCase Converts a string to title case. Use Regex.Matches() with an appropriate regular expression to break the … stringregexintermediate
• Yesterday Returns yesterday’s DateTime value. Use DateTime.Now to get the current date, then use … datebeginner

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