What is a bin directory

-

A bin is an abbreviation of binary, a bin directory is a standard directory used to store executable binary applications.

For example When you type a command on your terminal the operating system looks up for an entry in the bin directory
Take for instance.

cowsay 'hello world'

If you type out the command above your operating system will look up for a file named cowsay inside the configured bin directory

let's say /usr/bin/

Should it find a relevant entry that matches the command 'cowsay' it will then pass arguments passed as parameters made available to the program 'cowsay'

Comments

Post a Comment

Popular posts from this blog

FlappingBird JS13K Games

-
Image
FlappingBird is a Mobile side scroller game where the player controls a bird, attempting to fly between columns trees without hitting them Development of this game started out when i was attempting to draw perfect clouds programmatically on a canvas i later added a few more clouds (Something's missing) add moon, stars,  buildings and also add Gradients and for the games character i settled on a bird (using Sprite sheet obtained freely from opengameart) add more them and animated everything. FlappingBird is a single player arcade-style game in which the player controls the bird, which moves persistently to the right. The player is tasked with navigating the bird through pairs of trees that have equally sized gaps placed at random heights. the bird automatically gravitates and only ascends when the player taps the touchscreen or spacebar. Each successful pass through a pair of trees awards the player one point. Colliding with a tree or the ground ends the gamepl...
Read more

comparison on var, let and const variable declaration

-
Introduction let, const and var are keywords used for variable declarations in JavaScript programming language, const and let were newly introduced to the programming language in Escmascript es6 or es2016. Declaration keywords the syntax of declaring a variable using let keyword is done as; let {variable name} = value for const it's done as; const {variable name} = value similarly with var; var {variable name} = value Scope for 'let' and 'const' variables let and const declared variables are block scoped that means values assigned remain within the block of assignment; take for instance; if(true) {    const declaration = "declared" } console.log(typeof declaration) // undefined values remain accessible only within the if block Scope for 'var' variables var declared variables are function scoped so variables declared within a function are only accessible within the function it's self for example; function assign(param){    ...
Read more

unused css rules tree shaking elimination nodejs

-
Unused css rules elimination process is a lot more like tree shaking done by JavaScript bundlers for instance if you're familiar with how webpack eliminates dead code as a result tree shaking generates a much smaller bundle with only essential code Purifycss is a nodejs npm open source package that eliminates unused css You can use purifycss to remove excess css from libraries such as bootstrap, materal design lite to name a few, Installation You can get "purify-css" npm package from the package manager by typing in your terminal; npm i purify-css To install globally add -g flag; npm i -g purify-css Basic example usage; You can use css purify global cli package as; Syntax; purifycss {css} {html} Important flags; -m minify output -o specify output file name For example; purifycss *.css *.html -o css.min.css Output containg minified css rules will get saved to css.min.css
Read more

JavaScript introduction to variables

-
JavaScript is a dynamically typed programming language variables are declared using the following format var `variablename` `value` instead of int integer = 100 In JavaScript a variable can accommodate any typeof value ie a variable can be assigned numbers, strings, functions, and objects. among modern browsers or in "strict mode" variables can be declared in an alternative way using const and let keywords. variable's defined this way's values can not be changed once they have been assigned. ie they are referred to as immutable. var name = "John" var lastname var year = 2020 // var age var male = true console.log( typeof name) // string console.log(typeof lastname) ///undefined console.log(typeof age) // undefined console.log(typeof year) // number console.log(typeof male) // boolean const pi  = 22 / 7 pi = undefined; // sometimes this can raise a typescript error // assignment to constant variable in strict mode console.log(pi) // 3.142...
Read more

How to make a html5 breakout game in JavaScript

-
In this tutorial i will walk through the  process of developing a simple breakout game in JavaScript using html5 canvas I'll be using craters.js a compact html5 game engine. in every step i will first explain the procedure in a less technical method later I'll include the snippets of the actual game , a link to the github repository and a live working demo. Game world is 2d space with zero friction and zero gravity in order to avoid applying acceleration to the entities periodically maybe this will be changed later. First entity is a ball an entity with zero friction that upon colliding with an obstacle such as a block, paddle or the the screen boundaries bounces back in the opposite direction the bouncing from left to the right side of the screen is implemented by if(position.x  + radius < 0) // bounce if(velocity > 0) return; // moving velocity *= -1; // change direction direction is only changed if the ball tries to move  beyond the zero position. i have t...
Read more