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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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pavel

function u(t) {

g=_=>2*Math.random()-1;Y=g(X=g(r=512));h=X*X+Y*Y<=1
x.fillStyle=R(a=99+!h*99,a,a);x.fillRect(r+r*X,r+r*Y,32,32)
t?0:n=d=0;throw 4*(n+=h)/++d

Oct 27 2018 3:13 AM UTC

}// 140/140

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Estimating Pi using the Monte Carlo Method

u/katkip

Genius!
u/pavel

#pi

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AnnanFay

remix of d/7047 by u/BuRRak

function u(t) {

throw p+=(f%4*4-4)/(f++*f++*f)};{p=3,f=2

Feb 25 2018 7:01 AM UTC

}// 40/140

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Golfing u/BuRRak π calculation using Nilakantha's series

u/AnnanFay

Alternatives are: 33 chars using Wallis product but *very* long time to converge. 24 chars using Newton-Raphson if sin & cos allowed.
u/BuRRak

Mind = blown
u/iverjo

#pi

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Jezza

function u(t) {

c.width|=0;x.font='99px monospace';if(!t)p=3,a=2,o=0,q=2;p+=24/a/(a+1)/(a+3)/(a+=4);x.fillText((p+o).toFixed(15),9,99);if(p>q)p-=q,o+=q;q/=2

Jan 31 2018 10:32 PM UTC

}// 140/140

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I thought I'd see if I can calulate PI in 140 chars. Math.PI is 3.141592653589793, which is 15 decimal places. 15 decimal places is precise enough to calculate the circumference of the solar system (including Pluto) with an accuracy of a meter. The formula is Nilakantha's from the 15th century. You could also just print 245850922/78256779 but doing that doesn't seem much better than just printing Math.PI.

u/donbright

#pi #math

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