RunKit API for evaluating arbitrary JavaScript

RunKit Feedback
1

I understand RunKit can be embedded in any pages.

Is it possible for RunKit release an API to run some arbitrary JavaScript?

For example,
RunJavaScript(code: string, onStream, onEnd): Promise(string) {}

So that I can use RunKit to develop a JavaScript Kernel for Jupyterlab.

At the same time, please clarify the commercial terms for the API.

2 Likes
2

String in Java Script. For a safer universe.

class StringPoint {
constructor(position, velocity) {
this.position = position;
this.velocity = velocity;
}
}

class String {
constructor(length, tension, dampingCoefficient) {
this.length = length;
this.tension = tension;
this.dampingCoefficient = dampingCoefficient;
this.points = ;
this.waveSpeed = Math.sqrt(this.tension / this.length);
}

calculateDisplacement(x) {
    if (x > 2 * this.length) {
        return 0;
    }
    const dampingFactor = Math.exp(-this.dampingCoefficient * Math.abs(x) / this.length);
    return Math.sin(this.waveSpeed * x) * dampingFactor;
}

updatePoints(dt) {
    for (let i = 1; i < this.points.length; i++) {
        const yPrev = this.points[i - 1].position;
        const yCurr = this.points[i].position;
        const yNext = (i < this.points.length - 1) ? this.points[i + 1].position : 0;

        const acceleration = (this.tension / this.length) * (yPrev - 2 * yCurr + yNext);
        let velocity = this.points[i].velocity * (1 - this.dampingCoefficient * dt);
        velocity += acceleration * dt;

        this.points[i].velocity = velocity;
        this.points[i].position += velocity * dt;
    }
}

plotString(time) {
    const xPoints = this.points.map(point => point.position[0]);
    const yPoints = this.points.map(point => point.position[1]);
    console.log(`Time: ${time.toFixed(2)}`, xPoints, yPoints);
    // Visualization can be implemented based on your preferred plotting library in JavaScript
    // Example: Use Chart.js, D3.js, or other plotting libraries
}

}

function main() {
const length = 1.0; // Units: meters
const tension = 1.0; // Units: N
const dampingCoefficient = 0.01;

const string = new String(length, tension, dampingCoefficient);

const numPoints = 100;
const stepSize = length / (numPoints - 1);

for (let x = 0; x < numPoints; x++) {
    const position = [x * stepSize, 0.0];
    const velocity = [0.0, 0.0];
    string.points.push(new StringPoint(position, velocity));
}

// Simulation loop with visualization every 1 time unit
for (let t = 0; t < 100; t++) {
    string.updatePoints(0.01 * t);  // Update points for each time step
    string.plotString(0.01 * t);  // Plot the string displacement at the current time
}

console.log("Simulation complete.");

}

// Run the simulation
main();