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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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Current theme challenge: #Food

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taupelink

remix of d/28934 by u/taupelink

function u(t) {

with(x)for(i=r=240;i--&&t<3;fill(stroke()))d=lineWidth=.6**t,beginPath(fillStyle=R(i,r,i|r,i/r)),arc(i%9*r,i%5*r,r*d,r+=i%.4+S(r+t),r+6-2*t)

Dec 22 2023 3:36 AM UTC

}// 140/140

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d/29188

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Agnes

function u(t) {

with(x)for(c.width|=i=9,scale(5,5);--i;fillText("🎀",X-1,Y))fillRect(X=20*(4+i+S(t)*3),Y=80,10,40),fillRect(X-2,Y,14,8),clearRect(X+4,Y,2,40)

Dec 20 2023 11:12 AM UTC

}// 140/140

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Gift box default

u/Agnes

#default

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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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Xen

remix of d/29149 by u/danny@hille.dk

function u(t) {

i=t*99;x.fillRect(960-i+(w=63&i),i,i+i,1)

Dec 18 2023 8:53 PM UTC

}// 41/140

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abruptly abstract 41 remixx

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Xen

remix of d/29157 by u/vgel

function u(t) {

for(i=1e3;i--;Y=i-t,x.lineTo(X=1e3+S(i/2)*1e3,(Y-S(X*Y*Y+t/Y**.3*93)*99)/Y**.6*-9+1e3));x.beginPath(x.stroke())

Dec 18 2023 8:27 PM UTC

}// 111/140

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chaotic tree bridge.

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lewdev

remix of d/29018 by u/xyper

function u(t) {

c.width=200;x.fillText(`you are${document.referrer.includes`beta`?'':" not"} on the beta frontend`,9,50)

Dec 11 2023 6:56 PM UTC

}// 104/140

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Beta detector

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Xen

remix of d/29066 by u/zachygreen

function u(t) {

s=40
N=1920/s
i=t*3333/s|0
Y=i/N|0
X=i-Y*N
x.fillStyle=R((X*23-Y*11)%256)
x.fillRect(X*s,Y*s,30,30)

Dec 5 2023 9:03 PM UTC

}// 99/140

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Saved another fast 28 chars like a pro B)

u/danny@hille.dk

if you pre calculate 85b => i=t*83|0,Y=i/48|0,X=i-Y*48,x.fillStyle=R((X*23-Y*11)%256),x.fillRect(X*40,Y*40,30,30)
u/danny@hille.dk

ok I cheated a bit: 3333/40 = 83.325 note 83 :-)

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baon

remix of d/29067 by u/baon

function u(t) {

for(c.width|=0,X=Y=0,p=i=2e3;i--;x.fillRect(960+400*X,540-400*Y,9,9))
r=0.1+99**S(1e4*i)**10/2,X=r*S(i+t/5),Y=r*C(i+t/5)

Dec 5 2023 3:26 PM UTC

}// 120/140

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zachygreen

function u(t) {

t*=60
x.fillStyle=R(0,S(t/5)*127+127)
v=(t==0)?0:v
a=(t==0)?0:a
v=(a>930)?-v*0.95:v
a+=v
x.fillRect(t*3%1920,a,100,150)
v++

Dec 3 2023 9:50 PM UTC

}// 123/140

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taupelink

remix of d/28997 by u/taupelink

function u(t) {

for(i=150;i-->450*t;x.fill(x.stroke()))x.beginPath(x.fillStyle=['#3EB','#FC4','#C9F'][i%3]+(i%3%2+1)),x.arc(i%43%9*240,i%5*240,i*t**t,i,i+4)

Dec 3 2023 3:15 AM UTC

}// 140/140

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d/29019

u/Xen

nice!