How do LED monitors make the connections between each LED

From my understanding, LED monitors turn each pixel on sequentially at such a high speed that the human eye can't observe it, but how does it make the necessary connections? For example, for a monitor made with a single color of LED across a standard HD resolution (say 1940 x 1080) there would have to be 3020 connections assuming its built in a grid.

I'm assuming I'm missing something.

Generate randomized 256MB files onto your drive.(C++)

Haven't programmed in a long time. Last project was a GCODE pathway generator I wrote several years back. My compiler is obviously several years out of date.
Uses time(), itoa(), rand(). Current standard compliant compilers should have , , , and to_string() in suppliment to those more deprecated functions.

This is a very simple, high speed method of generatinga alot of randomized junk data onto your drive. Make sure you have about 300MB of RAM available for the overhead. An older non-SSD might croak.

Useful for making old files unrecoverable by overwriting the old space on a drive. Doesn't go about overwriting any file tables, partitions, etc. Only where the file system allows it to dump the files by defualt. So it's fairly safe, since you're not completely rewriting the disk.

Top 10 Dictionary APIs

There are many reasons developers may want to add dictionary functions to software applications. Word technology can help increase vocabulary, improve reading, writing and speaking skills, supply translation services, process language for sentiment or other analysis, and aid accessibility for the hearing impaired.

JavaFX Smooth Key Events

I am making a ping pong game using JavaFX, but before I am going to make that, I like to test the KeyEvents.
I made a simple ping pong game about 2 years ago, but I like to improve my game.
And was pretty bad controlls back when I made the ping pong game, because of the not smooth controls.

so here is the problem:
whenever I holdpress A and switch quickly to holdpress D or D to A, same with (W to S and S to W).
it just takes a little break and then move, is there something I can change, improve?
I don't know why it does this.