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Generating Random Whole numbers in JavaScript in a specific range

Sh Raj on January 14, 2022

Video Documentation :- https://youtu.be/xz3VbIaEG8o Mozilla Developer Network page on this JavaScript Math Object: https://developer.mozil...
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jonrandy profile image
Jon Randy πŸŽ–οΈ •

About 40% faster:

const getRandomInt = (min, max)=>~~(Math.random()*(max-min+1)+min)
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darkwiiplayer profile image
π’ŽWii πŸ³οΈβ€βš§οΈ •

It's faster because it doesn't work; at least not for numbers bigger than what fits in a 32-bit integer ;)

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jonrandy profile image
Jon Randy πŸŽ–οΈ •

Poorly written spec ;)

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darkwiiplayer profile image
π’ŽWii πŸ³οΈβ€βš§οΈ •

The spec is wrong 😝

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sh20raj profile image
Sh Raj •

Can You Minify this Function also...

function getParameterByName( name ){
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( window.location.href );
  if( results == null )
    return "";
  else
    return decodeURIComponent(results[1].replace(/\+/g, " "));
}
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darkwiiplayer profile image
π’ŽWii πŸ³οΈβ€βš§οΈ • • Edited

No need, your browser already minified it for you and put it in a class called URLSearchParams 😝

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codingjlu profile image
codingjlu •

The "minified" form doesn't behave the same. In negative numbers, the first function is inclusive, while the second one is exclusive.

Run both about 30 times to see what I mean, and pass the values -10, -1.