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AboutAll PostsWarningRandom

Speed Coded Mouse Toy

  1. d = document
  2. b = d.body
  3. b.style.margin = 0
  4. with (b.appendChild(
  5.   Object.assign(d.createElement`canvas`, {
  6.     width: innerWidth,
  7.     height: innerHeight,
  8.   })
  9. ).getContext`2d`) {
  10.   mx = 0
  11.   my = 0
  12.  
  13.   onresize = _ => {
  14.     canvas.width = innerWidth
  15.     canvas.height = innerHeight
  16.   }
  17.  
  18.   onpointermove = e => {
  19.     mx = e.clientX, 
  20.     my = e.clientY
  21.   }
  22.  
  23.   r = 0
  24.   loop = () => {
  25.     save()
  26.     globalCompositeOperation = 'hard-light'
  27.     translate(innerWidth / 2, innerHeight / 2)
  28.  
  29.     rotate(r += .02)
  30.     translate(-innerWidth / 2, -innerHeight / 2)
  31.  
  32.     fillStyle = 'rgba(55, 55, 55, .01)'
  33.     fillRect(0, 0, innerWidth, innerHeight)
  34.  
  35.     fillStyle = 'rgba(116, 196, 221, .02)'
  36.     fillRect(0, my, innerWidth, 20);
  37.  
  38.     fillStyle = 'rgba(255, 255, 255, .02)'
  39.     fillRect(mx, 0, 20, innerHeight);
  40.  
  41.     fillStyle = 'rgba(0, 0, 0, .03)'
  42.     fillRect(0, innerHeight - my, innerWidth, 20);
  43.  
  44.     fillStyle = 'rgba(116, 196, 221, .02)'
  45.     fillRect(innerWidth - mx, 0, 20, innerHeight);
  46.     restore()
  47.     requestAnimationFrame(loop)
  48.   }
  49.   loop()
  50. }

Speed coded mouse toy…

// canvas // codegolf // globals // graphics // hacks // speedcoding

Shorthand Primitives Golfing

  1. !0 // true
  2.  
  3. !1 // false
  4.  
  5. 1/0 // Infinity
  6.  
  7. 0[0] // undefined (any digit works)

This is from user Isiah Meadows on the codegolf stackexchange…

// codegolf // javascript // speedcoding

valueOf for Shorter Function Calls

  1. r={valueOf:_=>Math.random()}
  2. console.log(+r)
  3. console.log(+r)
  4. console.log(+r)

Use valueOf to shorten function calls. I learned this trick over at stackexchange codegolf here from user cyoce.

// codegolf // javascript // math // random

Guess the semi-golf

  1. a=3217+'';a=[a];console.log(a[0][2])

Try and guess what would be logged here…

// arrays // codegolf // humor // javascript // strings

Obfuscated Pre

  1. b = document.body
  2. with(b.style) 
  3.   fontFamily = 'monospace', fontSize = '2em',
  4.   transform = 'skew(10deg) translateX(40px)'
  5.  
  6. N = '<br>';
  7.  
  8. (f=(_='*')=>(
  9.   b.innerHTML+=` <b style='opacity:${Math.random()+.2}'>${_}</b>`,f))('<pre>')
  10.   (   )(   )(   )(   )(N)
  11.    ('(')('0')('_')('_')(N)
  12.     ('-')(   )(   )('-')(N)
  13.      ('_')('_')('0')(')')(N)
  14.       ('-')(   )(   )('-')(N)
  15.        ('(')('0')('_')('_')(N)
  16.         ('-')(   )(   )('-')(N)
  17.          ('_')('_')('0')(')')(N)
  18.           ('-')(   )(   )('-')(N)
  19.            ('(')('0')('_')('_')(N)
  20.             (   )(   )(   )(   )

Not really sure what this is… just playing around…

// codegolf // javascript // obfuscation // speed-coded // strings
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