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Added console log to make async more clear #74

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Added console log to make async more clear #74

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2 changes: 2 additions & 0 deletions readme.md
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Original file line number Diff line number Diff line change
Expand Up @@ -164,9 +164,11 @@ function addOne(callback) {

function logMyNumber() {
console.log(myNumber)
console.log("Done !");
}

addOne(logMyNumber)
console.log("Doing some other stuff")
```

Now the `logMyNumber` function can get passed in as an argument that will become the `callback` variable inside the `addOne` function. After `readFile` is done the `callback` variable will be invoked (`callback()`). Only functions can be invoked, so if you pass in anything other than a function it will cause an error.
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