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Figure bracket => curly brace

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Brent Guffens 2018-01-19 09:12:59 +01:00 • committed by GitHub
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1-js/02-first-steps/15-function-expressions-arrows/article.md
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@ -299,7 +299,7 @@ if (age < 18) {
} }
} }
// Here we're out of figure brackets, // Here we're out of curly braces,
// so we can not see Function Declarations made inside of them. // so we can not see Function Declarations made inside of them.
*!* *!*
@ -440,15 +440,15 @@ They are very convenient for simple one-line actions, when we're just too lazy t
The examples above took arguments from the left of `=>` and evaluated the right-side expression with them. The examples above took arguments from the left of `=>` and evaluated the right-side expression with them.
Sometimes we need something a little bit more complex, like multiple expressions or statements. It is also possible, but we should enclose them in figure brackets. Then use a normal `return` within them. Sometimes we need something a little bit more complex, like multiple expressions or statements. It is also possible, but we should enclose them in curly braces. Then use a normal `return` within them.
Like this: Like this:
```js run ```js run
let sum = (a, b) => { // the figure bracket opens a multiline function let sum = (a, b) => { // the curly brace opens a multiline function
let result = a + b; let result = a + b;
*!* *!*
return result; // if we use figure brackets, use return to get results return result; // if we use curly braces, use return to get results
*/!* */!*
}; };
@ -476,5 +476,5 @@ So we should use a Function Expression only when a Function Declaration is not f
Arrow functions are handy for one-liners. They come in two flavors: Arrow functions are handy for one-liners. They come in two flavors:
1. Without figure brackets: `(...args) => expression` -- the right side is an expression: the function evaluates it and returns the result. 1. Without curly braces: `(...args) => expression` -- the right side is an expression: the function evaluates it and returns the result.
2. With figure brackets: `(...args) => { body }` -- brackets allow us to write multiple statements inside the function, but we need an explicit `return` to return something. 2. With curly braces: `(...args) => { body }` -- brackets allow us to write multiple statements inside the function, but we need an explicit `return` to return something.