# D

- [Damm algorithm](/sidef-lang/programming_tasks/d/damm_algorithm.md)
- [Date format](/sidef-lang/programming_tasks/d/date_format.md)
- [Date manipulation](/sidef-lang/programming_tasks/d/date_manipulation.md)
- [Day of the week](/sidef-lang/programming_tasks/d/day_of_the_week.md)
- [Days between dates](/sidef-lang/programming_tasks/d/days_between_dates.md)
- [De Polignac numbers](/sidef-lang/programming_tasks/d/de_polignac_numbers.md)
- [Death Star](/sidef-lang/programming_tasks/d/death_star.md)
- [Deceptive numbers](/sidef-lang/programming_tasks/d/deceptive_numbers.md)
- [Decimal floating point number to binary](/sidef-lang/programming_tasks/d/decimal_floating_point_number_to_binary.md)
- [Decision tables](/sidef-lang/programming_tasks/d/decision_tables.md)
- [Decorate-sort-undecorate idiom](/sidef-lang/programming_tasks/d/decorate-sort-undecorate_idiom.md)
- [Deepcopy](/sidef-lang/programming_tasks/d/deepcopy.md)
- [Define a primitive data type](/sidef-lang/programming_tasks/d/define_a_primitive_data_type.md)
- [Delegates](/sidef-lang/programming_tasks/d/delegates.md)
- [Delete a file](/sidef-lang/programming_tasks/d/delete_a_file.md)
- [Deming's funnel](/sidef-lang/programming_tasks/d/demings_funnel.md)
- [Department numbers](/sidef-lang/programming_tasks/d/department_numbers.md)
- [Descending primes](/sidef-lang/programming_tasks/d/descending_primes.md)
- [Detect division by zero](/sidef-lang/programming_tasks/d/detect_division_by_zero.md)
- [Determinant and permanent](/sidef-lang/programming_tasks/d/determinant_and_permanent.md)
- [Determine if a string has all the same characters](/sidef-lang/programming_tasks/d/determine_if_a_string_has_all_the_same_characters.md)
- [Determine if a string has all unique characters](/sidef-lang/programming_tasks/d/determine_if_a_string_has_all_unique_characters.md)
- [Determine if a string is collapsible](/sidef-lang/programming_tasks/d/determine_if_a_string_is_collapsible.md)
- [Determine if a string is numeric](/sidef-lang/programming_tasks/d/determine_if_a_string_is_numeric.md)
- [Determine if a string is squeezable](/sidef-lang/programming_tasks/d/determine_if_a_string_is_squeezable.md)
- [Determine if only one instance is running](/sidef-lang/programming_tasks/d/determine_if_only_one_instance_is_running.md)
- [Dice game probabilities](/sidef-lang/programming_tasks/d/dice_game_probabilities.md)
- [Digit fifth powers](/sidef-lang/programming_tasks/d/digit_fifth_powers.md)
- [Digital root](/sidef-lang/programming_tasks/d/digital_root.md)
- [Multiplicative digital root](/sidef-lang/programming_tasks/d/digital_root/multiplicative_digital_root.md)
- [Dijkstra's algorithm](/sidef-lang/programming_tasks/d/dijkstras_algorithm.md)
- [Dinesman's multiple-dwelling problem](/sidef-lang/programming_tasks/d/dinesmans_multiple-dwelling_problem.md)
- [Disarium numbers](/sidef-lang/programming_tasks/d/disarium_numbers.md)
- [Discordian date](/sidef-lang/programming_tasks/d/discordian_date.md)
- [Display a linear combination](/sidef-lang/programming_tasks/d/display_a_linear_combination.md)
- [Distinct palindromes within decimal numbers](/sidef-lang/programming_tasks/d/distinct_palindromes_within_decimal_numbers.md)
- [Distinct power numbers](/sidef-lang/programming_tasks/d/distinct_power_numbers.md)
- [Distribution of 0 digits in factorial series](/sidef-lang/programming_tasks/d/distribution_of_0_digits_in_factorial_series.md)
- [Diversity prediction theorem](/sidef-lang/programming_tasks/d/diversity_prediction_theorem.md)
- [DNS query](/sidef-lang/programming_tasks/d/dns_query.md)
- [Dot product](/sidef-lang/programming_tasks/d/dot_product.md)
- [Double Twin Primes](/sidef-lang/programming_tasks/d/double_twin_primes.md)
- [Doubly-linked list](/sidef-lang/programming_tasks/d/doubly-linked-list.md)
- [Element definition](/sidef-lang/programming_tasks/d/doubly-linked-list/element_definition.md)
- [Dragon curve](/sidef-lang/programming_tasks/d/dragon_curve.md)
- [Draw a clock](/sidef-lang/programming_tasks/d/draw_a_clock.md)
- [Draw a cuboid](/sidef-lang/programming_tasks/d/draw_a_cuboid.md)
- [Draw a sphere](/sidef-lang/programming_tasks/d/draw_a_sphere.md)
- [Duffinian numbers](/sidef-lang/programming_tasks/d/duffinian_numbers.md)
- [Dynamic variable names](/sidef-lang/programming_tasks/d/dynamic_variable_names.md)