Live programming @ University of Washington
Public
Edited
Feb 21, 2023
math = (await import('https://cdn.skypack.dev/mathjs'))
function branchConditionalHandler(node, options) {
if (node.type !== 'ConditionalNode') {
return node.toTex(options)
}
const conditions = [node]
let curr = node
while (curr.falseExpr.type === 'ConditionalNode') {
conditions.push(curr.falseExpr)
curr = curr.falseExpr
}
const deparen = node => node.type === 'ParenthesisNode' ? node.content : node
const deparenCondition = c => ({...c, condition: deparen(c.condition), trueExpr: deparen(c.trueExpr), falseExpr: deparen(c.falseExpr)})
conditions.push(conditions[conditions.length - 1]) // duplicate the final condition
return conditions.map(deparenCondition).map((c, i) =>
i === 0 ? `\\mathbf{if} \\> ${c.condition.toTex()}: \\\\ \\quad ${c.trueExpr.toTex()}`
: i !== conditions.length - 1 ? `\\mathbf{elif} \\> ${c.condition.toTex()}: \\\\ \\quad ${c.trueExpr.toTex()}`
: `\\mathbf{else :} \\\\ \\quad ${c.falseExpr.toTex()}`).join('\\\\')
}
htl.html`<button onclick=${() => navigator.clipboard.writeText('hey')}>click me</button>`
tex`${math.parse('x > 1 ? 1 : 0').toTex({handler: (node, options) => node.type === 'ConditionalNode' ? `\\mathbf{if} \\> ${node.condition.toTex()}: \\\\ \\quad ${node.trueExpr.toTex()} \\\\ \\mathbf{else}: \\\\ \\quad ${node.falseExpr.toTex()}` : node.toTex(options)})}`
tex`${math.parse('(x > 1) ? (0) : x > 2 ? 1 : 3').toTex({handler: branchConditionalHandler})}`
math.parse('(x > 1)')
math.parse("(x)")
async function waitUntil(testFn, interval) {
if (testFn()) {return;}
let resolve = undefined
const p = new Promise(r => resolve = r)
const id = setInterval(() => { if (testFn()) { clearInterval(id); resolve(); }}, interval )
await p
}
a = ({b: 40})
{
const t0 = performance.now()
await waitUntil(() => a.b == 42, 1000)
return performance.now() - t0
}
a.b = 42
viewof table = Inputs.table(cars)
inputs = require('@observablehq/inputs')
inputs.table(cars)
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