Kay•8mo ago

Better way of finding element from map

Im making an api and all routes are stored in a map. is there a better and more optimised way to look if the route exists and to get it?

handleRequest(req: Request, info: Deno.ServeHandlerInfo): Response {
    const path = new URL(req.url).pathname;
    const route = this.getRoute(path);
    if (!route) return new Response("not found", {status: 404});
    console.log(route);

    return new Response("Hello World!");
}

getRoute(pathname: string): Route | undefined {
    const paths = pathname.split("/").filter(val => val.length > 0);
    const path = paths.join("/");
    let routes = Array.from(this.routes.keys());
    for (const route of routes) {
        const regex = new RegExp(`^(${route.replaceAll(/\[.*\]/g, "(.*)")})$`)
        if (!regex.test(path)) continue;
        return this.routes.get(route);
    }
        
}

handleRequest(req: Request, info: Deno.ServeHandlerInfo): Response {
    const path = new URL(req.url).pathname;
    const route = this.getRoute(path);
    if (!route) return new Response("not found", {status: 404});
    console.log(route);

    return new Response("Hello World!");
}

getRoute(pathname: string): Route | undefined {
    const paths = pathname.split("/").filter(val => val.length > 0);
    const path = paths.join("/");
    let routes = Array.from(this.routes.keys());
    for (const route of routes) {
        const regex = new RegExp(`^(${route.replaceAll(/\[.*\]/g, "(.*)")})$`)
        if (!regex.test(path)) continue;
        return this.routes.get(route);
    }
        
}

2 Replies

NeTT•8mo ago

Why not store the regex string (or better, the regex itself) as the key for the map so that you don't need to do a route.replaceAll() on it everytime? Meanwhile the loop can use Map.prototype.entries() and become something like

for (const [route, val] of this.routes.entries()) {
const regex = new RegExp(`^(${route.replaceAll(/\[.*\]/g, "(.*)")})$`)
  if (regex.test(path)) {
    return val;
  }
}

for (const [route, val] of this.routes.entries()) {
const regex = new RegExp(`^(${route.replaceAll(/\[.*\]/g, "(.*)")})$`)
  if (regex.test(path)) {
    return val;
  }
}

Kay•8mo ago

thx