Dweets by u/384.cz

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300,400,50,200) // draw 50x200 rects

} // 122/140

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    u(t) is called 60 times per second.
    t: Elapsed time in seconds.
    S: Shorthand for Math.sin.
    C: Shorthand for Math.cos.
    T: Shorthand for Math.tan.
    R: Function that generates rgba-strings, usage ex.: R(255, 255, 255, 0.5)
    c: A 1920x1080 canvas.
    x: A 2D context for that canvas.

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384.cz

remix of d/29177 by u/tomxor

function u(t) {

x.fillRect(960-R/2,t**=2,R=t+t%99,3)

Dec 19 2023 6:21 PM UTC

}// 36/140

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36 and a lot faster!

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384.cz

function u(t) {

throw 052

Dec 19 2023 6:15 PM UTC

}// 9/140

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How?!

Show more comments…
u/danny@hille.dk

prefixing any number with 0, and javascript interpret it as octodecimal (base 8) jist like prefixing with 0x nd javascript interpret it as hexadecimal (base 16)
u/Odog8

100% worst js feature
u/danny@hille.dk

It's a C language feature that bleed in Java, and from Java into javascript
u/Odog8

ah, didnt know that, neat. Still frustrating imo
u/New_Core

there is 0o for octal.. if use just 0 and accidently have a 8 or 9, it becomes a normal decimal while 0o will throw an error. as said before, you have 0b = binary 0o = octal 0x = hexa
u/rodrigo.siqueira

oh no, 078 throws "78" and 077 throws "63".
u/neimad

077/078 is not a really a gotcha. It seems to follow Javascript's patterns for type coercion. Some numbers can evaluate as octal numbers, and some can't. If a string starts with 0 and contains only numbers 0 through 7, then it is evaluated as octal. If the string starts with 0 and has any number above 7 (not octal), then it evaluates as decimal. It's not a mystery, it actually makes some sense even if octal in Javascript is not normally used.
u/tomxor

On the rare occasion when you need to set file permissions from JS you will finally appreciate it :D

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384.cz

function u(t) {

for(_=i=9n;i-->1;)_*=i
throw _

Dec 19 2023 6:04 PM UTC

}// 30/140

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Micro #factorial

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384.cz

function u(t) {

"Hello world"
x.font="1in'"
x.fillText(code[(f=frame-1)%92],((0|f/2)*100)%2e3,(1+0|f/20)*90)

Dec 18 2023 9:29 AM UTC

}// 92/140

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Weird #quine

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384.cz

function u(t) {

c.style.filter="invert(";for(c.width=i=99;i--;)x.fillText('.*'[+!(i%9)],50+S(i+t/i)*50,i*t%67)

Dec 18 2023 9:07 AM UTC

}// 94/140

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#snow

u/rodrigo.siqueira

For a moment, I thought there were Space Invaders characters in the background.
u/384.cz

:-)

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384.cz

function u(t) {

for(j=2e3;j--;x.fillStyle=`#${j%9}73`)x.fillRect(t=S(t)*j,t=S(t)*j,99,99)

Dec 16 2023 6:47 PM UTC

}// 73/140

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#wild #noiser

u/384.cz

#noise

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384.cz

remix of d/28918 by u/384.cz

function u(t) {

t>1&&(x.fillStyle="#07d")
x.fillRect(0,720-360*t,2e3,9)

Nov 22 2023 4:56 PM UTC

}// 55/140

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Estonia #flag

u/magna

2 chars shorter: x.fillStyle=t>1&&"#07d"
u/384.cz

thank you, magna
u/BriSeven

Oh no, politics on dwitter. HELL, HELL I TELLS YOU

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384.cz

function u(t) {

x.fillStyle=["#07d",R(),"#fff"][0|t]
x.fillRect(0,360*t,2e3,9)

Nov 22 2023 4:54 PM UTC

}// 62/140

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Estonia #flag

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384.cz

function u(t) {

t||(G='')
onclick=_=>{K=_.x
G+=r(0)+r(4)+r(0)+`
`}
Z=K
r=_=>"cat,dog,ant,fox,met,had,killed,kissed".split`,`[0|_+2+(Z=S(2*Z)*2)]+" "
throw G

Nov 21 2023 7:27 PM UTC

}// 140/140

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Click different place on canvase - Generate different #poem verse

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384.cz

function u(t) {

c.width=1920
for(j=2e3;j--;)for(i=9;i--;)x.fillRect(400+(j/20)+i*150+S(t*2)*300,400+(j/9&j),2,2)

Nov 20 2023 6:09 PM UTC

}// 96/140

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#Sierpinski #default

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