Created
January 13, 2018 00:26
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| /* | |
| * callback -> promise -> async/await | |
| */ | |
| function foo_callback(x) | |
| { | |
| console.log("foo_callback: " + x); | |
| setTimeout(foo_callback, 1000, x + 1); | |
| } | |
| foo_callback(0); | |
| function foo_promise(x) | |
| { | |
| console.log("foo_promise: " + x); | |
| let p = new Promise(resolve => setTimeout(resolve, 1000, x + 1)); | |
| p.then(foo_promise); | |
| } | |
| foo_promise(0); | |
| async function foo_async(x) | |
| { | |
| while (true) { | |
| console.log("foo_async: " + x); | |
| let p = new Promise(resolve => setTimeout(resolve, 1000, x + 1)); | |
| x = await p; | |
| } | |
| } | |
| foo_async(0); | |
| /* | |
| * async/await -> promise -> callback | |
| */ | |
| async function bar_async() | |
| { | |
| let p = new Promise(resolve => setTimeout(resolve, 1000, 42)); | |
| let r = await p; | |
| console.log("bar_async: " + r); | |
| } | |
| bar_async(); | |
| function bar_promise() | |
| { | |
| let p = new Promise(resolve => setTimeout(resolve, 1000, 42)); | |
| p.then((r) => console.log("bar_promise: " + r)); | |
| } | |
| bar_promise(); | |
| function bar_callback() | |
| { | |
| setTimeout((r) => console.log("bar_callback: " + r), 1000, 42); | |
| } | |
| bar_callback(); |
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