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doc: use arrow functions in util.md sample code
PR-URL: #17459 Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Jon Moss <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Ruben Bridgewater <[email protected]>
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doc/api/util.md

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@@ -119,11 +119,9 @@ it is marked as deprecated.
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```js
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const util = require('util');
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exports.puts = util.deprecate(function() {
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for (let i = 0, len = arguments.length; i < len; ++i) {
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process.stdout.write(arguments[i] + '\n');
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}
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}, 'util.puts: Use console.log instead');
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exports.obsoleteFunction = util.deprecate(() => {
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// Do something here.
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}, 'obsoleteFunction() is deprecated. Use newShinyFunction() instead.');
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```
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When called, `util.deprecate()` will return a function that will emit a
@@ -1023,7 +1021,7 @@ util.isObject(null);
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// Returns: false
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util.isObject({});
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// Returns: true
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util.isObject(function() {});
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util.isObject(() => {});
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// Returns: false
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```
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@@ -1055,7 +1053,7 @@ util.isPrimitive(undefined);
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// Returns: true
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util.isPrimitive({});
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// Returns: false
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util.isPrimitive(function() {});
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util.isPrimitive(() => {});
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// Returns: false
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util.isPrimitive(/^$/);
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// Returns: false

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