Commit 962fa79

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closes #3122

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Original file line number	Diff line number	Diff line change
`@@ -54,3 +54,17 @@ function parse(expr) {`
`54`	`54`
`55`	`55`	`alert( parse("-1.23 * 3.45") ); // -1.23, *, 3.45`
`56`	`56`	```
	`57`	`+`
	`58`	+As an alternative to using the non-capturing `?:`, we could name the groups, like this:
	`59`	`+`
	`60`	+```js run
	`61`	`+function parse(expr) {`
	`62`	`+ let regexp = /(?<a>-?\d+(?:\.\d+)?)\s(?<operator>[-+\/])\s*(?<b>-?\d+(?:\.\d+)?)/;`
	`63`	`+`
	`64`	`+ let result = expr.match(regexp);`
	`65`	`+`
	`66`	`+ return [result.groups.a, result.groups.operator, result.groups.b];`
	`67`	`+}`
	`68`	`+`
	`69`	`+alert( parse("-1.23 * 3.45") ); // -1.23, *, 3.45;`
	`70`	+```

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