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JOHN SWANA

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How to wait for a promise within a loop block

JavaScript promises enable developers to write asynchronous applications in JavaScript Loops are ways of iterating elements For instance doing an asynchronous task within a for loop can be done as follows; Note that lag is used to emulate some delay. const items = [1, 2, 3, 4] const lag = async (delay) => {     return new Promise((resolve) =>         setTimeout(() => res(`${delay / 1000} sec`), delay)) } items.forEach(async (item) => {     const seconds = await lag(1000 * item)     console.log(seconds) }) expected output 1 sec 2 sec 3 sec 4 sec After running the code above every second some text was printed
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JavaScript math methods

JavaScript comprehensive list of all JavaScript Math methods Math.round () {type} method {parameter} {Number} {description} It returns a given number rounded off to the nearest integer. ie Math.round(0.6251) // returns 1 or Math.round(1.7252) // returns 2 Math . pow () {type} method {parameter} {Number}, {Number} {description} It returns a given number raised to the power the exponent. ie Math.pow(2, 5) // returns 32 or Math.pow(7, 2) // returns 49 Math.sqrt () {type} method {parameter} {Number} {description} It returns the square root of a given integer. ie Math.sqrt(25) // returns 5 or Math.sqrt(64) // returns 8 Math.abs () {type} method {parameter} {Number} {description} It returns absolute positive value of a given number ie Math.abs(-10) // returns 10 or Math.abs(52) // returns 52 Math.ceil () {type} method {parameter} {Number} {description} It returns a smaller number which is greater or equal to the given integer. ie Math.ceil(9.87) // returns 10 or...
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How to set content disposition header for nginx server to force content download

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Nginx (pronounced as engine x) is an HTTP server, reverse proxy server, as well as a mail proxy server Nginx is well known for its high performance, stability, efficiency, rich feature set, simple configuration, and low resource consumption. content disposition headers direct web browsers to save content instead of attempting to render it To set content disposition open your desired server configuration in "/etc/nginx/sites-available/" within your configuration add code below within your server {block} location ~* (mp3|ogg|wav)$ {     add_header Content-Disposition "attachment"; } mp3, ogg and wav are example file extensions matched by regular expressions rules Test configuration by acessing mp3, ogg and wav files from your webserver Alternatively you can force custom filenames as shown below "$1" substitutes filenames sent to clients. As an example its value corresponds to the requested file's extension lo...
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Snake monochrome (JS1024)

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How to make a html5 breakout game in JavaScript

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