What does this `…${…}…` code in the node docs mean? [duplicate]
Solution 1:
This:
`The area of a circle of radius 4 is ${circle.area(4)}`
is an example of ES2015 template strings.
It interpolates whatever circle.area(4) represents directly into the string. If you're curious about this or other ES2015 features, I recommend checking out Babel and playing around in the REPL.
Here's a very simple example to get you started.
You can see this ES2015 code:
const foo = 'some text';
console.log(`${foo} is interpolated.`);
is transpiled to its ES5 equivalent - a simple + concatenation:
var foo = 'some text';
console.log(foo + ' is interpolated.');