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doc: some fixes in console.md #10451

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bdbb092
doc: var -> const / let in the console.md
vsemozhetbyt Dec 25, 2016
540e723
doc: more efficient example in the console.md
vsemozhetbyt Dec 25, 2016
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29 changes: 17 additions & 12 deletions doc/api/console.md
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Original file line number Diff line number Diff line change
Expand Up @@ -88,7 +88,7 @@ const errorOutput = fs.createWriteStream('./stderr.log');
// custom simple logger
const logger = new Console(output, errorOutput);
// use it like console
var count = 5;
const count = 5;
logger.log('count: %d', count);
// in stdout.log: count 5
```
Expand Down Expand Up @@ -135,15 +135,20 @@ the default behavior of `console` in Node.js.

// Creates a simple extension of console with a
// new impl for assert without monkey-patching.
const myConsole = Object.setPrototypeOf({
assert(assertion, message, ...args) {
try {
console.assert(assertion, message, ...args);
} catch (err) {
console.error(err.stack);
}
}
}, console);
const myConsole = Object.create(console, {
assert: {
value: function assert(assertion, message, ...args) {
try {
console.assert(assertion, message, ...args);
} catch (err) {
console.error(err.stack);
}
},
configurable: true,
enumerable: true,
writable: true,
},
});

module.exports = myConsole;
```
Expand Down Expand Up @@ -217,7 +222,7 @@ values similar to printf(3) (the arguments are all passed to
[`util.format()`][]).

```js
var count = 5;
const count = 5;
console.log('count: %d', count);
// Prints: count: 5, to stdout
console.log('count:', count);
Expand Down Expand Up @@ -248,7 +253,7 @@ prints the result to `stdout`:

```js
console.time('100-elements');
for (var i = 0; i < 100; i++) {
for (let i = 0; i < 100; i++) {
;
}
console.timeEnd('100-elements');
Expand Down