Apnea Coding

This program is a simple demonstration for illustrating how classic declarative programming can provide very intuitive and compact solution generators for logic problems and combinatorial tasks. In this example, a set of bricks with three sizes and a stability constraint ("do not put larger above") is coded to provide solution searching on all possible ways to build a stable tower of a specific height. Prolog's main advantage over other declarative programming languages is that even in the early '80s came with a rich library of common functionalities that made real-world application development easy. Turbo Prolog was probably the best option for PC machines, with efficient memory enhancements via more strict typing and other syntax shortcuts to limit the tree search in manageable space/time requirements for these platforms. Although now depricated by constrained and fuzzy logic paradigms, Prolog-style programming is still the most intuitive way to design simple expe...

This program is a simple demonstration of basic user I/O and arithmetic operations in one of the earliest versions of COBOL that was made available for home computers in the early '80s. The "executable" was actually an intermediate binary format created as the compiler output, which could then be executed by another program, not very differently than today's Just-In-Time (JIT) compilers or pre-compiled interpreted languages. The language is the creation of Grace Hopper, a pivotal figure in the evolution of programming and the design of the first trully general-purpose languages. The two main strengths of COBOL was the rich I/O functionality for data file handling and the screen handling routines for creating terminal-based user I/O via forms and tables. Although functionally limited and with loquacious syntax by the programming standards of later language generations, COBOL was deemed extremely reliable and understandable by the programmers of those early days. So m...

Pseudo-random number generator function in retro Fortran no-talking, in emulated 80286 / MS-DOS machine in DOSbox. This program implements a pseudo-random number generator (PRNG) by using the classic Mixed-Congruential Sequence (linear) method, as it was described by D. Knuth (1972) regarding proper parameter choices for high-entropy output. The general rules for parameter choice are: M (modulo) must be at most half the available bits width of the integer type used. C (increment) should be chosen close to the value: M * (1/2 - sqrt(3)/6) = 0.2113248654051871... For example: M=2^8 gives C=54 (54.09916...) A (multiplier) should be chosen as to satisfy the following three requirements: A mod 8 = 5 , A between M/100 and M-sqrt(M) , A must not have trivial bit pattern value. Then these three values, along with a user-provided seed value X0, can be used iteratively with: X(n+1) = (A * X(n) + C) mod M , X(0)=X0. Provided that all constraints are satisfied, there are various ...

Fibonacci series in pure C no talking, using only vim and gcc in terminal, implementing four alternative designs: 1) Recursive: using the typical mathematical definition for Fib(n) 2) Iterative: using loop instead of recursion to avoid call stack overflows 3) Dynamic Programming: using buffer for cached results, calculated only once 4) Analytical: using the solution of the differential equation for Fib(n) Each option has its pros and cons, typically trading code simplicity for resources (recursion) or trading memory (cache) for speed. The purpose of this tutorial is to demonstrate coding discipline when working with very limited coding tools (command-line only in terminal) and alternative designs for use in different situations. Inline comments describe details about the code being written. Enable captions for more information on what is happening in each section of the video. Enable captions for more details and walk-through. Source code available at the Github repository (see chann...

This is an example code for estimating the value of 'pi'. The method is a trivial Monte-Carlo sampling upon a quarter-circle using built-in 'random'. Two different estimations are impleneted: (a) the average area under curve (AUC), which is the (randomized) integral of y=f(x)=sqrt(1-x*x) in [0,1], and (b) the area ratio between the quarter-circle and its bounding box. Since the AUC uses twice the number of samples, it should produce consistently better estimations. Turbo Pascal 3.0 was one of those programming artworks of the early '80s, fitting an editor (external), a compiler, debugger and plenty of room to work with in just 64 KB of RAM. Similarly, it was one of the first programming tools (besides x86 Assemblers) to produce .COM executables directly, since the 'tiny' memory model was the default option at that time. Enable captions for more details and walk-through. Source code available at the Github repository (see channel info). Tags: #asmr #coding...

This is just a small snippet of PHP code illustrating the use of generic variables and console (server-side) scripting. Although PHP is almost entirely focused on web application development, basic syntax and features make it a general-purpose programming choice like other more popular alternatives, e.g. Python, Perl, Tcl, Bash, etc. Enable captions for more details and walk-through. Source code available at the Github repository (see channel info). Tags: #asmr #coding #programming #notalking #php #terminal #console

Quadratic equation (ax^2+bx+c=0) solver in retro GW-Basic no-talking, in emulated 80286 / MS-DOS machine in DOSbox. This tutorial is a taste of how home programming looked like in the early '80s, while also showing how difficult it was to correctly pre-plan all 'goto' conditional jumps beforehand when line numbering and editing was the only way to actually edit the source code. Enable captions for more details and walk-through. Source code available at the Github repository (see channel info). Tags: #ambient #coding #programming #notalking #basic #retro #msdos #dosbox

Welcome to the coding dive. Coding as it is supposed to be. No need to talk, no rush. Take a deep breath, keep it. Empty your mind. Exhale slowly. Relax. Now, let's dive in. Tags: #asmr #ambient #coding #programming #notalking #gcc #fortran #cobol #basic #pascal #msdos #linux #unix #vim #retro #terminal