Learn Algorithms with Object Pascal/Delphi 2022

Set up a cross-platform Object Pascal development environment with Free Pascal, download and install the compiler, and create a console hello world project.

Solve integer digit tasks in Delphi 2022 by extracting ones and tens and rotating digits; compute seconds since day start, day of week, and square packing in a rectangle.

Solve boolean-based programming tasks in Delphi: check oddness with mod two, test distinct digits of a three-digit number, recognize ascending/descending digit orders, and verify isosceles triangles.

Learn how to convert a decimal number to binary by dividing by two, collecting remainders, and counting the ones in the result.

Solve conditional problems with real numbers: sum the two largest of three; double or negate triples; identify the odd one out; and evaluate the real function.

Explore creating reusable functions and using for loops in Object Pascal/Delphi to solve problems like prime counting, power calculations, digit extraction, and computing distances between points.

Learn algorithms with Object Pascal Delphi 2022: implement one-pass solutions for the sixth of ten tasks, five input-sequence problems, including min/max, rectangle area and perimeter, and density-based selection.

This lecture tackles Delphi array tasks, including first and last minimal element indices, the first maximal odd number, maximal sum of adjacent elements, and minimal product of adjacent elements.

Solve seven Pascal Delphi array tasks. Use while loops with static and dynamic arrays, indexing from zero or one, to generate odd numbers, powers of two, Fibonacci terms, and sums.

Explore recursion in Object Pascal Delphi 2022 by implementing three tasks: factorial, double factorial, and digits sum using recursive functions and base cases.

Solve a warmup in object pascal/delphi by scoring a real world quiz with dynamic arrays and strings. Use a check answers function to compute total score.

Explore lexicographic string comparison using a compare function in Pascal/Delphi, and learn to sort players by name and then by id, using -1, 0, or 1 results.

Learn an algorithm to determine if a string has all unique characters by using a boolean array for ASCII indices and a length check to detect duplicates.

Use memoization to optimize a recursive fibonacci function, reducing exponential time by caching results. Explore bottom-up versus top-down dynamic programming to implement efficient fibonacci calculations.

Learn two sum solutions: a naive O(n^2) approach with O(1) space and a linear-time O(n) approach using a two-pointer method for sorted arrays.

Learn how generics in Delphi enable a key-value pair data structure with a flexible generic class that works with multiple types.

Explore the stack data structure and its last-in, first-out behavior by performing push, pop, peak, and extract operations, illustrated with a Delphi generics-based stack of strings.

Learn to convert integers to binary using a stack in Object Pascal/Delphi 2022. Implement division by two, push remainders to a TStack, and pop to build the binary string.