User:Alexei Kopylov/sandbox


 * 24_game
 * 24_game/Solve
 * 9_billion_names_of_God_the_integer
 * 99_Bottles_of_Beer
 * ABC_Problem
 * Abstract_type
 * Abundant,_deficient_and_perfect_number_classifications
 * Abundant,_deficient_and_perfect_number_classifications
 * Abundant,_deficient_and_perfect_number_classifications
 * Accumulator_factory
 * Ackermann_function
 * Active_Directory/Connect
 * Active_Directory/Search_for_a_user
 * Active_object
 * Add_a_variable_to_a_class_instance_at_runtime
 * Address_of_a_variable
 * AKS_test_for_primes
 * Align_columns
 * Aliquot_sequence_classifications
 * Almost_prime
 * Amicable_pairs
 * Anagrams
 * Anagrams/Deranged_anagrams
 * Angle_difference_between_two_bearings
 * Anonymous_recursion
 * Append_a_record_to_the_end_of_a_text_file
 * Apply_a_callback_to_an_array
 * Apply_a_digital_filter_(direct_form_II_transposed)
 * Arbitrary-precision_integers_(included)
 * Archimedean_spiral
 * Arena_storage_pool
 * Arithmetic_evaluation
 * Arithmetic-geometric_mean
 * Arithmetic-geometric_mean/Calculate_Pi
 * Arithmetic/Complex
 * Arithmetic/Integer
 * Rational data type/Rational
 * Array_concatenation
 * Array_length
 * Arrays
 * Assertions
 * Associative_array/Creation
 * Associative_array/Iteration
 * Atomic_updates
 * Average_loop_length
 * Averages/Arithmetic_mean
 * Averages/Mean_angle
 * Averages/Mean_time_of_day
 * Averages/Median
 * Averages/Mode
 * Averages/Pythagorean_means
 * Averages/Root_mean_square
 * Averages/Simple_moving_average
 * AVL_tree
 * Babbage_problem
 * Balanced_brackets
 * Balanced_ternary
 * Barnsley_fern
 * Benford's_law
 * Bernoulli_numbers
 * Best_shuffle
 * Binary_digits
 * Binary_search
 * Binary_strings
 * Bitcoin/address_validation
 * Bitcoin/public_point_to_address
 * Bitmap
 * Bitmap/Bresenham's_line_algorithm
 * Bitmap/Bézier_curves/Cubic
 * Bitmap/Bézier_curves/Quadratic
 * Bitmap/Flood_fill
 * Bitmap/Histogram
 * Bitmap/Midpoint_circle_algorithm
 * Bitmap/PPM_conversion_through_a_pipe
 * Bitmap/Read_a_PPM_file
 * Bitmap/Read_an_image_through_a_pipe
 * Bitmap/Write_a_PPM_file
 * Bitwise_operations
 * Boolean_values
 * Box_the_compass
 * Brace_expansion
 * Brownian_tree
 * Bulls_and_cows
 * Bulls_and_cows/Player
 * Caesar_cipher
 * Calendar
 * Calendar_-_for_"REAL"_programmers
 * Foreign function interface
 * Call_a_function
 * Call_a_function_in_a_shared_library
 * Call_an_object_method
 * Canny_edge_detector
 * Carmichael_3_strong_pseudoprimes
 * Cartesian_product_of_two_or_more_lists
 * Casting_out_nines
 * Catalan_numbers
 * Catamorphism
 * Catmull–Clark_subdivision_surface
 * Chaos_game
 * Character_codes
 * Chat_server
 * Check_Machin-like_formulas
 * Check_that_file_exists
 * Chinese_remainder_theorem
 * Chinese_zodiac
 * Cholesky_decomposition
 * Circles_of_given_radius_through_two_points
 * Classes
 * Closest-pair_problem
 * Closures/Value_capture
 * Collections


 * Color_of_a_screen_pixel
 * Color_quantization
 * Colour_bars/Display
 * Combinations
 * Combinations_and_permutations
 * Combinations_and_permutations
 * Combinations_with_repetitions
 * Comma_quibbling
 * Command-line_arguments
 * Command-line_arguments
 * Commatizing_numbers
 * Comments
 * Compare_a_list_of_strings
 * Compare_sorting_algorithms'_performance
 * Compile-time_calculation
 * Compiler/AST_interpreter
 * Compiler/code_generator
 * Compiler/lexical_analyzer
 * Compiler/syntax_analyzer
 * Compiler/virtual_machine_interpreter

--
 * Compound_data_type
 * Concurrent_computing
 * Conditional_structures
 * Conjugate_transpose
 * Constrained_genericity
 * Constrained_random_points_on_a_circle
 * Continued_fraction
 * Continued_fraction/Arithmetic/Construct_from_rational_number
 * decimal
 * Convert_seconds_to_compound_duration
 * Conway's_Game_of_Life
 * Copy_a_string
 * Count_in_factors
 * Count_in_octal
 * Count_occurrences_of_a_substring
 * Count_the_coins
 * Cramer's_rule
 * CRC-32
 * Create_a_file
 * Create_a_file
 * Create_a_file_on_magnetic_tape
 * Create_a_two-dimensional_array_at_runtime
 * Create_an_HTML_table
 * Create_an_object_at_a_given_address
 * CSV_data_manipulation
 * CSV_to_HTML_translation
 * Cumulative_standard_deviation
 * Currying
 * CUSIP
 * Cut_a_rectangle
 * Date_format
 * Date_manipulation
 * Day_of_the_week
 * Deal_cards_for_FreeCell
 * Deconvolution/1D
 * Deconvolution/2D+
 * Deepcopy
 * Define_a_primitive_data_type
 * Define_a_primitive_data_type
 * Delegates
 * Delete_a_file
 * Delete_a_file
 * Department_Numbers
 * Detect_division_by_zero
 * Determine_if_a_string_is_numeric
 * Determine_if_only_one_instance_is_running
 * Digital_root
 * Digital_root/Multiplicative_digital_root
 * Dinesman's_multiple-dwelling_problem
 * Dining_philosophers
 * Discordian_date
 * Distributed_programming
 * DNS_query
 * Documentation
 * Dot_product
 * Doubly-linked_list/Definition
 * Doubly-linked_list/Element_definition
 * Doubly-linked_list/Element_insertion
 * Doubly-linked_list/Traversal
 * Dragon_curve
 * Draw_a_clock
 * Draw_a_cuboid
 * Draw_a_pixel
 * Draw_a_rotating_cube
 * Draw_a_sphere
 * Draw_pixel_2
 * Dutch_national_flag_problem
 * Dynamic_variable_names
 * Echo_server
 * Eertree
 * Egyptian_division
 * Egyptian_fractions
 * Element-wise_operations
 * Elementary_cellular_automaton
 * Emirp_primes
 * Empty_directory
 * Empty_program
 * Empty_string
 * Enforced_immutability
 * Entropy
 * Entropy/Narcissist
 * Enumerations
 * Environment_variables
 * Equilibrium_index
 * Ethiopian_multiplication
 * Euler_method
 * Euler's_sum_of_powers_conjecture
 * Evaluate_binomial_coefficients
 * Even_or_odd
 * Events
 * Evolutionary_algorithm
 * Exceptions
 * Exceptions/Catch_an_exception_thrown_in_a_nested_call
 * Executable_library
 * Execute_a_Markov_algorithm
 * Execute_a_system_command
 * Execute_Brain****
 * Execute_HQ9+
 * Execute_SNUSP
 * Exponentiation_operator
 * Exponentiation_order
 * Extend_your_language
 * Extensible_prime_generator
 * Extreme_floating_point_values
 * Factorial
 * Factors_of_a_Mersenne_number
 * Factors_of_an_integer
 * Farey_sequence
 * Fast_Fourier_transform
 * FASTA_format
 * Fibonacci_n-step_number_sequences
 * Fibonacci_sequence
 * Fibonacci_word
 * Fibonacci_word/fractal
 * File_input/output
 * File_modification_time
 * File_size
 * Filter
 * Find_common_directory_path
 * Find_largest_left_truncatable_prime_in_a_given_base
 * Find_limit_of_recursion
 * Find_palindromic_numbers_in_both_binary_and_ternary_bases
 * Find_the_intersection_of_two_lines
 * Find_the_last_Sunday_of_each_month
 * Find_the_missing_permutation
 * First_class_environments
 * First-class_functions
 * First-class_functions/Use_numbers_analogously
 * Five_weekends
 * FizzBuzz
 * Flatten_a_list
 * Flipping_bits_game
 * Flow-control_structures
 * Floyd's_triangle
 * Floyd-Warshall_algorithm
 * Forest_fire
 * Fork
 * Formal_power_series
 * Formatted_numeric_output
 * Forward_difference
 * Four_bit_adder
 * Fractal_tree
 * Fractran
 * FTP
 * Function_composition
 * Function_definition
 * Function_frequency
 * Function_prototype
 * Galton_box_animation
 * Gamma_function
 * Gaussian_elimination
 * General_FizzBuzz
 * Generate_Chess960_starting_position
 * Generate_lower_case_ASCII_alphabet
 * Generator/Exponential
 * Generic_swap
 * Get_system_command_output
 * Globally_replace_text_in_several_files
 * Go_Fish
 * Gray_code
 * Grayscale_image
 * Greatest_common_divisor
 * Greatest_element_of_a_list
 * Greatest_subsequential_sum
 * Greyscale_bars/Display
 * Guess_the_number
 * Guess_the_number/With_feedback
 * Guess_the_number/With_feedback_(player)
 * GUI_component_interaction
 * GUI_enabling/disabling_of_controls
 * GUI/Maximum_window_dimensions
 * Hailstone_sequence
 * Hamming_numbers
 * Handle_a_signal
 * Happy_numbers
 * Harshad_or_Niven_series
 * Hash_from_two_arrays
 * Hash_join
 * Haversine_formula
 * Hello_world/Graphical
 * Hello_world/Line_printer
 * Hello_world/Newbie
 * Hello_world/Newline_omission
 * Hello_world/Standard_error
 * Hello_world/Text
 * Hello_world/Web_server
 * Here_document
 * Heronian_triangles
 * Hickerson_series_of_almost_integers
 * Higher-order_functions
 * History_variables
 * Hofstadter_Figure-Figure_sequences
 * Hofstadter_Q_sequence
 * Hofstadter-Conway_$10,000_sequence
 * Holidays_related_to_Easter
 * Honeycombs
 * Horizontal_sundial_calculations
 * Horner's_rule_for_polynomial_evaluation
 * Host_introspection
 * Hostname
 * Hough_transform
 * HTTP
 * HTTPS
 * HTTPS/Authenticated
 * HTTPS/Client-authenticated
 * Huffman_coding
 * Hunt_The_Wumpus
 * I_before_E_except_after_C
 * IBAN
 * Identity_matrix
 * Image_convolution
 * Image_noise
 * Include_a_file
 * Increment_a_numerical_string
 * Infinity
 * Inheritance/Multiple
 * Inheritance/Single
 * Input_loop
 * Integer_comparison
 * Integer_overflow
 * Integer_sequence
 * Interactive_programming
 * Introspection
 * Inverted_index
 * Inverted_syntax
 * Iterated_digits_squaring
 * Jaro_distance
 * Jensen's_Device
 * JortSort
 * Josephus_problem
 * Joystick_position
 * JSON
 * Julia_set
 * Jump_anywhere
 * K-d_tree
 * K-means++_clustering
 * Kaprekar_numbers
 * Kernighans_large_earthquake_problem
 * Keyboard_input/Flush_the_keyboard_buffer
 * Keyboard_input/Keypress_check
 * Keyboard_input/Obtain_a_Y_or_N_response
 * Keyboard_macros
 * Knapsack_problem/0-1
 * Knapsack_problem/Bounded
 * Knapsack_problem/Continuous
 * Knapsack_problem/Unbounded
 * Knight's_tour
 * Knuth_shuffle
 * Knuth's_algorithm_S
 * Kronecker_product
 * Kronecker_product_based_fractals
 * Langton's_ant
 * Largest_int_from_concatenated_ints
 * Last_Friday_of_each_month
 * Last_letter-first_letter
 * Leap_year
 * Least_common_multiple
 * Left_factorials
 * Leonardo_numbers
 * Letter_frequency
 * Levenshtein_distance
 * Linear_congruential_generator
 * List_comprehensions
 * Literals/Floating_point
 * Literals/Integer
 * Literals/String
 * Logical_operations
 * Long_multiplication
 * Longest_common_subsequence
 * Longest_increasing_subsequence
 * Longest_string_challenge
 * Look-and-say_sequence
 * Loop_over_multiple_arrays_simultaneously
 * Loops/Break
 * Loops/Continue
 * Loops/Do-while
 * Loops/Downward_for
 * Loops/For
 * Loops/For_with_a_specified_step
 * Loops/Foreach
 * Loops/Increment_loop_index_within_loop_body
 * Loops/Infinite
 * Loops/N_plus_one_half
 * Loops/Nested
 * Loops/While
 * LU_decomposition
 * Lucas-Lehmer_test
 * Lucky_and_even_lucky_numbers
 * Ludic_numbers
 * Luhn_test_of_credit_card_numbers
 * Lychrel_numbers
 * LZW_compression
 * MAC_Vendor_Lookup
 * Machine_code
 * Mad_Libs
 * Magic_squares_of_doubly_even_order
 * Magic_squares_of_odd_order
 * Magic_squares_of_singly_even_order
 * Main_step_of_GOST_28147-89
 * Make_directory_path
 * Man_or_boy_test
 * Mandelbrot_set
 * Map_range
 * Matrix_arithmetic
 * Matrix_multiplication
 * Matrix_transposition
 * Matrix-exponentiation_operator
 * Maximum_triangle_path_sum
 * Maze_generation
 * Maze_solving
 * MD4
 * MD5
 * MD5/Implementation
 * Median_filter
 * Memory_allocation
 * Memory_layout_of_a_data_structure
 * Menu
 * Metaprogramming
 * Metered_concurrency
 * Metronome
 * Middle_three_digits
 * Miller–Rabin_primality_test
 * Minesweeper_game
 * Modular_exponentiation
 * Modular_inverse
 * Monte_Carlo_methods
 * Monty_Hall_problem
 * Morse_code
 * Mouse_position
 * Move-to-front_algorithm
 * Multifactorial
 * Multiple_distinct_objects
 * Multiple_regression
 * Multiplication_tables
 * Multiplicative_order
 * Multisplit
 * Munchausen_numbers
 * Munching_squares
 * Mutual_recursion
 * N'th
 * N-queens_problem
 * Named_parameters
 * Naming_conventions
 * Narcissist
 * Narcissistic_decimal_number
 * Natural_sorting
 * Nautical_bell
 * Negative_base_numbers
 * Nested_function
 * Non-continuous_subsequences
 * Non-decimal_radices/Convert
 * Non-decimal_radices/Input
 * Non-decimal_radices/Output
 * Nonoblock
 * Nonogram_solver
 * Nth_root
 * Null_object
 * Number_names
 * Number_reversal_game
 * Numeric_error_propagation
 * Numerical_integration
 * Numerical_integration/Gauss-Legendre_Quadrature
 * Object_serialization
 * Odd_word_problem
 * Old_lady_swallowed_a_fly
 * OLE_Automation
 * One_of_n_lines_in_a_file
 * One-dimensional_cellular_automata
 * OpenGL
 * Operator_precedence
 * Optional_parameters
 * Order_disjoint_list_items
 * Order_two_numerical_lists
 * Ordered_Partitions
 * Ordered_words
 * Palindrome_detection
 * Pangram_checker
 * Paraffins
 * Parallel_Brute_Force
 * Parallel_calculations
 * Parametric_polymorphism
 * Parametrized_SQL_statement
 * Parse_an_IP_Address
 * Parsing/RPN_calculator_algorithm
 * Parsing/RPN_to_infix_conversion
 * Parsing/Shunting-yard_algorithm
 * Partial_function_application
 * Partition_an_integer_X_into_N_primes
 * Pascal_matrix_generation
 * Pascal's_triangle
 * Pascal's_triangle/Puzzle
 * Password_generator
 * Pathological_floating_point_problems
 * Pattern_matching
 * Penney's_game
 * Pentagram
 * Percentage_difference_between_images
 * Percolation/Bond_percolation
 * Percolation/Mean_cluster_density
 * Percolation/Mean_run_density
 * Percolation/Site_percolation
 * Perfect_numbers
 * Perfect_shuffle
 * Permutation_test
 * Permutations
 * Permutations_by_swapping
 * Permutations/Derangements
 * Permutations/Rank_of_a_permutation
 * Pernicious_numbers
 * Phrase_reversals
 * Pi
 * Pick_random_element
 * Pig_the_dice_game
 * Pig_the_dice_game/Player
 * Pinstripe/Display
 * Pinstripe/Printer
 * Plasma_effect
 * Play_recorded_sounds
 * Playing_cards
 * Plot_coordinate_pairs
 * Pointers_and_references
 * Poker_hand_analyser
 * Polymorphic_copy
 * Polymorphism
 * Polynomial_long_division
 * Polynomial_regression
 * Polyspiral
 * Population_count
 * Power_set
 * Pragmatic_directives
 * Price_fraction
 * Primality_by_trial_division
 * Prime_decomposition
 * Primes_-_allocate_descendants_to_their_ancestors
 * Primorial_numbers
 * Priority_queue
 * Probabilistic_choice
 * Problem_of_Apollonius
 * Program_name
 * Program_termination
 * Pythagoras_tree
 * Pythagorean_quadruples
 * Pythagorean_triples
 * QR_decomposition
 * Quaternion_type
 * Queue/Definition
 * Queue/Usage
 * Quickselect_algorithm
 * Quine
 * Ramer-Douglas-Peucker_line_simplification
 * Random_number_generator_(device)
 * Random_number_generator_(included)
 * Random_numbers
 * Range_expansion
 * Range_extraction
 * Ranking_methods
 * Rate_counter
 * Ray-casting_algorithm
 * RCRPG
 * Read_a_configuration_file
 * Read_a_file_line_by_line
 * Read_a_specific_line_from_a_file
 * Read_entire_file
 * Real_constants_and_functions
 * Record_sound
 * Reduced_row_echelon_form
 * Reflection/Get_source
 * Reflection/List_methods
 * Reflection/List_properties
 * Regular_expressions
 * Remove_duplicate_elements
 * Remove_lines_from_a_file
 * Rename_a_file
 * Rendezvous
 * Rep-string
 * Repeat_a_string
 * Resistor_mesh
 * Respond_to_an_unknown_method_call
 * Retrieve_and_search_chat_history
 * Return_multiple_values
 * Reverse_a_string
 * Reverse_words_in_a_string
 * RIPEMD-160
 * Rock-paper-scissors
 * Roman_numerals/Decode
 * Roman_numerals/Encode
 * Roots_of_a_function
 * Roots_of_a_quadratic_function
 * Roots_of_unity
 * Rosetta_Code/Count_examples
 * Rosetta_Code/Find_bare_lang_tags
 * Rosetta_Code/Find_unimplemented_tasks
 * Rosetta_Code/Fix_code_tags
 * Rosetta_Code/Rank_languages_by_popularity
 * Rot-13
 * RSA_code
 * Run-length_encoding
 * Runge-Kutta_method
 * Runtime_evaluation
 * Runtime_evaluation/In_an_environment
 * S-Expressions
 * Safe_addition
 * Sailors,_coconuts_and_a_monkey_problem
 * Same_Fringe
 * Scope_modifiers
 * Scope/Function_names_and_labels
 * Search_a_list
 * Search_a_list_of_records
 * Secure_temporary_file
 * SEDOLs
 * Self-describing_numbers
 * Self-referential_sequence
 * Semiprime
 * Semordnilap
 * Send_an_unknown_method_call
 * Send_email
 * Sequence_of_non-squares
 * Sequence_of_primes_by_trial_division
 * Set
 * Set_consolidation
 * Set_of_real_numbers
 * Set_puzzle
 * Seven-sided_dice_from_five-sided_dice
 * SHA-1
 * SHA-256
 * Shell_one-liner
 * Shoelace_formula_for_polygonal_area
 * Short-circuit_evaluation
 * Show_the_epoch
 * Sierpinski_carpet
 * Sierpinski_pentagon
 * Sierpinski_triangle
 * Sierpinski_triangle/Graphical
 * Sieve_of_Eratosthenes
 * Simple_database
 * Simple_windowed_application
 * Simulate_input/Keyboard
 * Simulate_input/Mouse
 * Singleton
 * Singly-linked_list/Element_definition
 * Singly-linked_list/Element_insertion
 * Singly-linked_list/Traversal
 * Sleep
 * Smith_numbers
 * SOAP
 * Sockets
 * Sokoban
 * Solve_a_Hidato_puzzle
 * Solve_a_Holy_Knight's_tour
 * Solve_a_Hopido_puzzle
 * Solve_a_Numbrix_puzzle
 * Solve_the_no_connection_puzzle
 * Sort_a_list_of_object_identifiers
 * Sort_an_array_of_composite_structures
 * Sort_an_integer_array
 * Sort_disjoint_sublist
 * Sort_stability
 * Sort_three_variables
 * Sort_using_a_custom_comparator
 * Sorting_algorithms/Bead_sort
 * Sorting_algorithms/Bogosort
 * Sorting_algorithms/Bubble_sort
 * Sorting_algorithms/Cocktail_sort
 * Sorting_algorithms/Comb_sort
 * Sorting_algorithms/Counting_sort
 * Sorting_algorithms/Gnome_sort
 * Sorting_algorithms/Heapsort
 * Sorting_algorithms/Insertion_sort
 * Sorting_algorithms/Merge_sort
 * Sorting_algorithms/Pancake_sort
 * Sorting_algorithms/Permutation_sort
 * Sorting_algorithms/Quicksort
 * Sorting_algorithms/Radix_sort
 * Sorting_algorithms/Selection_sort
 * Sorting_algorithms/Shell_sort
 * Sorting_algorithms/Sleep_sort
 * Sorting_algorithms/Stooge_sort
 * Sorting_algorithms/Strand_sort
 * Soundex
 * Sparkline_in_unicode
 * Special_characters
 * Special_variables
 * Speech_synthesis
 * Spiral_matrix
 * Split_a_character_string_based_on_change_of_character
 * SQL-based_authentication
 * Stable_marriage_problem
 * Stack
 * Stack_traces
 * Stair-climbing_puzzle
 * Start_from_a_main_routine
 * State_name_puzzle
 * Statistics/Basic
 * Statistics/Normal_distribution
 * Stem-and-leaf_plot
 * Stern-Brocot_sequence
 * Straddling_checkerboard
 * Stream_Merge
 * String_append
 * String_case
 * String_comparison
 * String_concatenation
 * String_interpolation_(included)
 * String_length
 * String_matching
 * String_prepend
 * Strip_a_set_of_characters_from_a_string
 * Strip_block_comments
 * Strip_comments_from_a_string
 * Strip_control_codes_and_extended_characters_from_a_string
 * Strip_whitespace_from_a_string/Top_and_tail
 * Subleq
 * Substring
 * Substring/Top_and_tail
 * Subtractive_generator
 * Sudoku
 * Sum_and_product_of_an_array
 * Sum_and_Product_Puzzle
 * Sum_digits_of_an_integer
 * Sum_multiples_of_3_and_5
 * Sum_of_a_series
 * Sum_of_squares
 * Sum_to_100
 * Superellipse
 * Sutherland-Hodgman_polygon_clipping
 * Symmetric_difference
 * Synchronous_concurrency
 * System_time
 * Table_creation/Postal_addresses
 * Take_notes_on_the_command_line
 * Taxicab_numbers
 * Temperature_conversion
 * Terminal_control/Clear_the_screen
 * Terminal_control/Coloured_text
 * Terminal_control/Cursor_movement
 * Terminal_control/Cursor_positioning
 * Terminal_control/Dimensions
 * Terminal_control/Display_an_extended_character
 * Terminal_control/Hiding_the_cursor
 * Terminal_control/Inverse_video
 * Terminal_control/Positional_read
 * Terminal_control/Preserve_screen
 * Terminal_control/Ringing_the_terminal_bell
 * Terminal_control/Unicode_output
 * Ternary_logic
 * Test_a_function
 * Test_integerness
 * Text_processing/1
 * Text_processing/2
 * Text_processing/Max_licenses_in_use
 * Textonyms
 * The_ISAAC_Cipher
 * The_Name_Game
 * The_Twelve_Days_of_Christmas
 * Thiele's_interpolation_formula
 * Thue-Morse
 * Tic-tac-toe
 * Time_a_function
 * Tokenize_a_string
 * Tokenize_a_string_with_escaping
 * Top_rank_per_group
 * Topic_variable
 * Topological_sort
 * Topswops
 * Total_circles_area
 * Towers_of_Hanoi
 * Trabb_Pardo–Knuth_algorithm
 * Tree_traversal
 * Trigonometric_functions
 * Truncatable_primes
 * Truncate_a_file
 * Truth_table
 * Twelve_statements
 * Ulam_spiral_(for_primes)
 * Unbias_a_random_generator
 * Undefined_values
 * Unicode_strings
 * Unicode_variable_names
 * Universal_Turing_machine
 * Unix/ls
 * Update_a_configuration_file
 * URL_decoding
 * URL_encoding
 * URL_parser
 * Use_another_language_to_call_a_function
 * User_input/Graphical
 * User_input/Text
 * UTF-8_encode_and_decode
 * Validate_International_Securities_Identification_Number
 * Vampire_number
 * Van_der_Corput_sequence
 * Variable_size/Get
 * Variable_size/Set
 * Variable-length_quantity
 * Variables
 * Variadic_function
 * Vector_products
 * Verify_distribution_uniformity/Chi-squared_test
 * Verify_distribution_uniformity/Naive
 * Video_display_modes
 * Vigenère_cipher
 * Vigenère_cipher/Cryptanalysis
 * Visualize_a_tree
 * Vogel's_approximation_method
 * Voronoi_diagram
 * Walk_a_directory/Non-recursively
 * Walk_a_directory/Recursively
 * Water_collected_between_towers
 * Web_scraping
 * Window_creation
 * Window_creation/X11
 * Window_management
 * Wireworld
 * Word_search
 * Word_wrap
 * World_Cup_group_stage
 * Write_entire_file
 * Write_float_arrays_to_a_text_file
 * Write_language_name_in_3D_ASCII
 * Write_to_Windows_event_log
 * Xiaolin_Wu's_line_algorithm
 * XML/DOM_serialization
 * XML/Input
 * XML/Output
 * XML/XPath
 * Y_combinator
 * Yahoo!_search_interface
 * Yin_and_yang
 * Zebra_puzzle
 * Zeckendorf_arithmetic
 * Zeckendorf_number_representation
 * Zero_to_the_zero_power
 * Zhang-Suen_thinning_algorithm
 * Zig-zag_matrix