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doc: fix exec example in child_process
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Previously, the example was checking for error by strict equality to
null. The error could be undefined though which would fail that check.

PR-URL: #6660
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Jeremy Whitlock <jwhitlock@apache.org>
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evanlucas authored and Myles Borins committed Jun 24, 2016
1 parent 07a84cc commit 192b805
Showing 1 changed file with 7 additions and 7 deletions.
14 changes: 7 additions & 7 deletions doc/api/child_process.markdown
Original file line number Diff line number Diff line change
Expand Up @@ -139,13 +139,13 @@ generated output.

```js
const exec = require('child_process').exec;
const child = exec('cat *.js bad_file | wc -l',
(error, stdout, stderr) => {
console.log(`stdout: ${stdout}`);
console.log(`stderr: ${stderr}`);
if (error !== null) {
console.log(`exec error: ${error}`);
}
exec('cat *.js bad_file | wc -l', (error, stdout, stderr) => {
if (error) {
console.error(`exec error: ${error}`);
return;
}
console.log(`stdout: ${stdout}`);
console.log(`stderr: ${stderr}`);
});
```

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