Dwitter - javascript demos in 140 characters

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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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LimeLaser

function u(t) {

r=m=>m*Math.random()|0
x.fillStyle=R(r(32)*8,r(64)*4,r(32)*8)
for(i=9;i--;)x.fillRect(r(32)*60,r(18)*60,50,50)

May 21 2019 5:01 AM UTC

}// 110/140

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High Color Pixels (R5G6B5)

u/donbright

hahaha awesome
u/donbright

these colors are wonderful

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metamero

remix of d/14055 by u/metamero

function u(t) {

t?location='/id/14061':localStorage.Di=`DWOS v01<textarea id=I>for(c.width|=i=9;i--;)x.fillRect(100*(4+i+S(t)*3),400,50,200)\nt</textarea>`

May 22 2019 3:58 AM UTC

}// 139/140

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DWOS v01 DISK 1/3

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KilledByAPixel

function u(t) {

E="''";for(i=8;--i;)E=`localStorage.Q${i}+`+E
eval(unescape(escape(eval(E)).replace(/u(..)/g,"$1%")))

May 20 2019 8:11 PM UTC

}// 101/140

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♛ QUEEN'S GAMBIT ♛ - You may need to go to d/14031, and scroll down and up until the game starts (may take 7 times). Arrow keys move. Mouse aims. R restarts. God save the Queen! #Game

u/KilledByAPixel

#queensgambit

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rodrigo.siqueira

remix of d/14046 by u/rodrigo.siqueira

function u(t) {

c.width|=0;for(var w=960,i=8e3;i--;){var 
X=C(i**2)*1.3,
Y=S(i)*S(K=X*2-t)/2-1,
Z=C(i)*C(K)/2-2;
x.fillRect(w+w*X/Z,w*Y/Z,5,5)}

May 22 2019 2:51 AM UTC

}// 127/140

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The Thing

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aaaaaz

function u(t) {

try{a=a+1%2}catch{a=0}
x.drawImage(c,0,9);
x.translate(C(t*2)*a*10%1,S(t*3)*a*10%1)
x.fillRect(960+S(t)*100,0,3,3)
x.filter=`invert(99)`

May 19 2019 4:36 PM UTC

}// 137/140

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Mouving mountain

u/Xen

nice

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metamero

function u(t) {

t?location='/id/14053':localStorage.DWOS00=unescape(escape`𡁗𣱓𘁶𜀰🁢𬠾𡀺𧀾🁩𫡰𭑴𘁩𩀽𢐾🁢𬠾🁴𩑸𭁡𬡥𨐠𪑤👁🠼𛱴𩑸𭁡𬡥𨐾🁳𭁹𫁥🠪𮱢𨑣𪱧𬡯𭑮𩀭𨱯𫁯𬠺𘰰𜀰𞱣𫱬𫱲𞠣𞐹𞐻𩡯𫡴𛑦𨑭𪑬𮐺𠱯𭑲𪑥𬡽`.replace(/u../g,''))

May 22 2019 12:16 AM UTC

}// 140/140

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DWOS00 loader DWOS v00

u/metamero

scroll back and up to autoload DWOS and terminal d/14053
u/metamero

DWOS evals each input on terminal and appends each valid output on textarea
u/metamero

program dir : enter dir=_=>{O=[];for(o in localStorage)O.push(o);return O} and use with dir() to see what kind of trash are in your localStorage
u/metamero

replace location='/id/14056' to autoload d/14056 graphic tool
u/metamero

#DWOS

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metamero

function u(t) {

t?(I.onfocus=_=>T=0,I.onblur=_=>T=1,I.oninput=_=>A.value=eval(I.value)+"\n"+A.value,T?I.value=t&1?"_":"":0):c.outerHTML=localStorage.DWOS00

May 22 2019 12:09 AM UTC

}// 139/140

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DWOS00 terminal v00

u/metamero

if undefined use with loader d/14055 to create a copy of DWOS in the memory
u/metamero

#DWOS

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marc8

remix of d/14032 by u/marc8

function u(t) {

with(Math){a=-t;b=t;f=X=>1/cosh(X)
w=c.width|=p=i=0
s=w/frame
for(k=(b-a)/w;p<w;)x.fillRect(p+=s,q=w/4,s,-q*(y=f(a+k*p)),i+=k*s*y)
throw(i)}

May 21 2019 7:18 AM UTC

}// 140/140

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Infinity integration limits: use ±t for ±∞. Convergence not guaranteed.

u/13thptr

great
u/13thptr

#math

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marc8

function u(t) {

with(Math){a=1/E;b=E;f=X=>log(X)
w=c.width|=p=i=0
s=w/frame
for(k=(b-a)/w;p<w;)x.fillRect(p+=s,q=w/4,s,-q*(y=f(a+k*p)),i+=k*s*y)
throw(i)}

May 20 2019 9:08 PM UTC

}// 138/140

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Have fun integrating your functions from a to b. Use Math, but not my fault if you exceed the 140 chars ;)

u/Jezza

a=-1;b=1;f=X=>X*X*X-X
u/pavel

a=0;b=Math.PI;f=C
u/vinca

a=1/E;b=E;f=X=>S(X*9|t)
u/13thptr

#math

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aaaaaz

function u(t) {

if(!t){o="1";i=0;v=99
f=(b,c)=>o.replace(b,c)}o=f("1","01")
o.split('').map((c)=>{i=(i+1)%v;if(c=="1")x.fillRect(~~(i/9)*v,i%9*v,v,v)})

May 21 2019 8:34 PM UTC

}// 135/140

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I d'like to add one more o=f("1","01") but don't know how to reduce it more