Hot dweets by u/BuRRak

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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BuRRak

function u(t) {

t||(A=S=K=L=G=0);onkeydown=e=>self[e.code[3]]+=10;x.fillRect(S-A,L-K,10,10);G==0||(c.width|=G=0)

Feb 24 2018 5:08 PM UTC

}// 96/140

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Etch a Sketch, AS - left knob CCW and CW, KL - right knob CCW and CW, G - shake

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u/snydej

I haven't figured out why yet but once I press "[" or "]", G stops working but A, S,K, and L still work.
u/BuRRak

Yeah, i have that issue too. Very weird
u/zanella

It's because, when you hit [ or ], e.code[3] evals to c (fourth letter in BracketLeft and BracketRight). Then, self[c] overrides the c variable, which is the reference to the canvas, and because of that c.width|= stops working. The other keys still work because x still points to the canvas context, which is what draws the rectangles. ;)
u/zanella

You can fix this and also code golf 4 characters:
u/zanella

t||(a=s=k=l=g=0);onkeydown=e=>self[e.key]+=10;x.fillRect(s-a,l-k,10,10);g==0||(c.width|=g=0)
u/snydej

zanella: I'll give you the golf, but it's not a fix. It'll break if you press x or c. Not that I care too much; this dweet is quite clever even if no one should ever do this in practice.
u/snydej

Btw thanks for the explanation :) Also I golfed 9 more characters off it: t?g?c.width|=g=0:onkeydown=e=>self[e.key]+=10:a=s=k=l=g=0;x.fillRect(s-a,l-k,10,10)
u/zanella

u/snydej You're right, it's not a fix if it breaks something else. :D And I agree, this dweet is totally ingenious!
u/zanella

The unavoidable remix: https://www.dwitter.net/d/7102

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BuRRak

function u(t) {

t||(p=3);f=frame*2;p+=(f%4?4:-4)/((f)*(f+1)*(f+2));throw p

Feb 22 2018 8:08 PM UTC

}// 58/140

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Calculating Pi using Nilakantha's series :)

u/BuRRak

meh, got an extra pair of brackets in there, nvm

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BuRRak

function u(t) {

t||(e=1);f=n=>n?(n*f(n-1)):1;e+=1/f(frame);throw e;

Feb 23 2018 3:38 PM UTC

}// 51/140

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Calculating Euler's number, not really useful at all

u/mitakkee

2

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BuRRak

function u(t) {

t||(p=0,n=1);for(i=1e5;i--;)p+=4/(n++*2-1)*(n%2?-1:1);throw p

Feb 21 2018 5:05 PM UTC

}// 61/140

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Calculating pi :)

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u/BuRRak

Oh no, i just found out that something similar is on dwitter already.. oh well
u/aleamb

nice
u/aleamb

nice
u/zanella

Thumbs up for using the error output instead of the canvas. :)
u/BuRRak

golfed down by 2 characters t||(p=0,n=1);for(i=1e5;i--;)p+=(n%2?4:-4)/(n++*2-1);throw p
u/BuRRak

nvm, 4 characters, dwitter should have edit comment feature t||(p=n=0);for(i=1e5;i--;)p+=(n++%2?4:-4)/(n*2-1);throw p
u/BuRRak

Oh no, just noticed it throws negative pi, just swap 4 with -4

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BuRRak

function u(t) {

onkeydown=u=>c[(e=u.key.toLowerCase())]=(c[e]|0)+(u.shiftKey?-1:1);c.style.background=R(c.r,c.g,c.b);throw c.r+';'+c.g+';'+c.b;

Feb 20 2018 5:40 PM UTC

}// 127/140

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Color Preview - use R, G, B to increase the RGB values and shift + R,G,B to decrease them

u/akm

golfed it down to 99 chars: with(c){onkeydown=u=>[e=u.code[3]]=e+u.shiftKey?-1:1,style.background=R(r,g,b);throw r+';'+g+';'+b}
u/BuRRak

Oh wow, you won't stop amazing me! :)
u/joeytwiddle

Useful! :)
u/BirdsTweetCodersDweet

onkeydown=u=>c[(e=u.key.toLowerCase())]=(c[e]|0)+(u.shiftKey?-1:1);c.style.background=R(a=c.r%255,b=c.g%255,d=c.b%255);throw a+';'+b+';'+d; fixed your throws ;)
u/BirdsTweetCodersDweet

Or. with akm's modifications: with(c){onkeydown=u=>[e=u.code[3]]=e+u.shiftKey?-1:1,style.background=R(a=r%255,d=g%255,e=b%255);throw a+';'+d+';'+e}

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BuRRak

function u(t) {

c.p=t^0?c.p:"";this.onkeypress=(e)=>{v="";if(e.key==" "){v=c.p;c.p="";v=v+"="+eval(v)}else c.p+=e.key};throw v==""?c.p:v;

Jan 21 2018 1:30 AM UTC

}// 121/140

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Simple useless calculator, press space to calculate and use the keyboard to write your problem

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BuRRak

remix of d/6234 by u/BuRRak

function u(t) {

for(i=50,c.width|=0;i--;x.fillStyle="gold")for(r=90;r--;)x.fillRect(r*C(frame/20)*C(i)+960,r*S(i)+540,15,15)

Jan 20 2018 2:14 PM UTC

}// 108/140

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Shaved 25 characters off

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BuRRak

function u(t) {

c.width=c.width;x.fillStyle="gold";for(var i=0; i<50; i++)for(var r=0; r<90; r++)x.fillRect(r*C(frame/20)*C(i)+960,r*S(i)+540,15,15);

Jan 19 2018 10:25 PM UTC

}// 133/140

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u/sigveseb

a coin!

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BuRRak

function u(t) {

c.width=c.width;for(var i=0;i<50;i++){k=90*C(frame/20)*C(i)+960;l=90*S(i)+540;x.fillStyle=R(k%255,i*5,l%255);x.fillRect(k,l,10,10)};

Jan 20 2018 10:12 AM UTC

}// 132/140

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BuRRak

function u(t) {

f=frame/15;a=f*137.5;r=f*f;k=r*C(a);y=r*S(a);x.fillStyle = R(k,y,k*y%256);x.fillRect(k+c.width/2,y+c.height/2,15,15);

Jan 19 2018 8:14 PM UTC

}// 117/140

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