mirror of
https://github.com/osmarks/website
synced 2024-11-08 20:29:55 +00:00
75 lines
2.6 KiB
HTML
75 lines
2.6 KiB
HTML
---
|
|
title: osmarkscalculator
|
|
description: Unholy horrors moved from the depths of my projects directory to your browser. Theoretically, this is a calculator. Good luck using it.
|
|
---
|
|
<textarea id="program" style="width: 100%; resize: vertical" rows="5"></textarea>
|
|
<pre id="output"></pre>
|
|
<button id="go">Go</button>
|
|
<button id="clear">Clear Context</button>
|
|
<select id="examples">
|
|
</select>
|
|
<script>
|
|
const examples = {
|
|
"blank": "",
|
|
"factorial": `Fac[n] = Fac[n-1]*n
|
|
Fac[0] = 1
|
|
Fac[17]
|
|
`,
|
|
"expand": "(a+b)*(c+d)*(e+f)*(g+h)",
|
|
"expand2": "(a+b)^3*(b+c)-d",
|
|
"fibonacci": `Fib[n] = Fib[n-1] + Fib[n-2]
|
|
Fib[0] = 0
|
|
Fib[1] = 1
|
|
Fib[6]
|
|
`,
|
|
"predicate": `IsEven[x] = 0
|
|
IsEven[x#Eq[Mod[x, 2], 0]] = 1
|
|
IsEven[3] - IsEven[4]`,
|
|
"derivative": `D[3*x^3 + 6*x, x]`,
|
|
"simplify": `x^a/x^(a+1)`,
|
|
"simplify2": "Negate[a+b] + b",
|
|
"arith": `(12+55)^3-75+16/(2*2)+5+3*4`,
|
|
"subst": "Subst[x=4, x+4+4+4+4]"
|
|
}
|
|
const examplesSelector = document.querySelector("#examples")
|
|
const program = document.querySelector("#program")
|
|
for (const name of Object.keys(examples)) {
|
|
const opt = document.createElement("option")
|
|
opt.value = name
|
|
opt.appendChild(document.createTextNode(name))
|
|
examplesSelector.appendChild(opt)
|
|
}
|
|
examplesSelector.addEventListener("change", () => {
|
|
program.value = examples[examplesSelector.value]
|
|
})
|
|
var worker = new Worker("osmarkscalculator.js")
|
|
const forceKill = () => {
|
|
console.warn("Force-terminating worker.")
|
|
worker.terminate()
|
|
worker = new Worker("osmarkscalculator.js")
|
|
}
|
|
const write = data => {
|
|
const out = document.querySelector("#output")
|
|
while (out.firstChild) { out.removeChild(out.firstChild) }
|
|
out.appendChild(document.createTextNode(data))
|
|
}
|
|
document.querySelector("#go").addEventListener("click", () => {
|
|
console.log(program.value)
|
|
write("Running...")
|
|
worker.postMessage(["run", program.value])
|
|
var timeout = setTimeout(() => {
|
|
forceKill()
|
|
write("Execution timeout")
|
|
}, 5000)
|
|
worker.onmessage = ev => {
|
|
const [status, result, time] = ev.data
|
|
if (status === "ok") {
|
|
write(result + `\nin ${time}ms`)
|
|
} else {
|
|
write("Internal error: " + result + `\nin ${time}ms`)
|
|
}
|
|
clearInterval(timeout)
|
|
}
|
|
})
|
|
document.querySelector("#clear").addEventListener("click", () => worker.postMessage(["deinit"]))
|
|
</script> |