simon300000 · September 14, 2019 00:41 · Sep 14, 2019
diff --git a/worker.js b/worker.js
@@ -0,0 +1,44 @@
+// 刚刚说的感觉很有意思
+// 我做了个Demo2333
+// 不过只能弄很简单的Function（ 可见Functional是未来（ 误）
+
+const testFunction = num => num * 2
+const slowFunction = time => {
+  const now = Date.now()
+  let round = 0
+  while (now + time > Date.now()) {
+    round++
+  }
+  return round
+}
+
+const makeWorker = f => {
+  let pendingJobs = {}
+
+  const worker = new Worker(URL.createObjectURL(new Blob([
+    `onmessage = ({ data: { jobId, params } }) => {
+     const result = (${f.toString()})(...params)
+     postMessage({ jobId, result })
+    }`
+  ])))
+
+  worker.onmessage = ({ data: { result, jobId } }) => {
+    pendingJobs[jobId](result)
+    delete pendingJobs[jobId]
+  }
+
+  return (...params) => new Promise(resolve => {
+    const jobId = String(Math.random())
+    pendingJobs[jobId] = resolve
+    worker.postMessage({ jobId, params })
+  })
+}
+
+const testWorker = makeWorker(testFunction)
+const slowWorker = makeWorker(slowFunction)
+
+testWorker(122).then(console.log)
+slowWorker(1000).then(runs => console.log(`Runs: ${runs}`))
+testWorker(233).then(console.log)
+slowWorker(1000).then(runs => console.log(`Runs: ${runs}`))
+testWorker(233).then(console.log)
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