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24 lines
511 B
JavaScript
24 lines
511 B
JavaScript
let u
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const o=()=>u||(u=import('https://cdn.skypack.dev/js-priority-queue').then(r=>r.default||r))
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async function findShortestPath(g,s,t){
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const PQ=await o()
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if(s===t)return 0
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const d={},q=new PQ({comparator:(a,b)=>a[1]-b[1]})
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for(const k in g)d[k]=Infinity
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d[s]=0
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q.queue([s,0])
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while(q.length){
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const[n,w]=q.dequeue()
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if(w>d[n])continue
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if(n===t)return w
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for(const[nb,c]of Object.entries(g[n]||{})){
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const nw=w+c
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if(nw<d[nb]){
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d[nb]=nw
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q.queue([nb,nw])
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}
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}
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}
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return Infinity
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}
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export default findShortestPath; |