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React: Difference between revisions
→Spread operator
| Line 274: | Line 274: | ||
console.log(last); // Rose | console.log(last); // Rose | ||
console.log(peaks.join(", ")); // Rose, Ralston, Tallac | console.log(peaks.join(", ")); // Rose, Ralston, Tallac | ||
</source> | |||
Getting the rest of elements: | |||
<source lang="js"> | |||
const lakes = ["Donner", "Marlette", "Fallen Leaf", "Cascade"]; | |||
const [first, ...others] = lakes; | |||
console.log(others.join(", ")); // Marlette, Fallen Leaf, Cascade | |||
</source> | |||
function parameters: | |||
<source lang="js"> | |||
function directions(...args) { | |||
let [start, ...remaining] = args; | |||
let [finish, ...stops] = remaining.reverse(); | |||
console.log(`drive through ${args.length} towns`); | |||
console.log(`start in ${start}`); | |||
console.log(`the destination is ${finish}`); | |||
console.log(`stopping ${stops.length} times in between`); | |||
} | |||
directions("Truckee", "Tahoe City", "Sunnyside", "Homewood", "Tahoma"); | |||
</source> | </source> | ||