1. 使用 slice 和 reverse 2. 使用 ...扩展运算符 和 reverse 3. 使用 reduce 和 ...扩展运算符 4. 使用 reduceRight 和 ...扩展运算符 5. 或者使用push 参考资源: MDN Web Docs: reverse w3schools: reverse Stack Overflow: Reverse array in Javascript without mutating original array...
let arr = [1, 2, 3, 4, 5]; let reversedArr = reverseArrayWithoutMutating(arr); console.log(reversedArr); // 输出: [5, 4, 3, 2, 1] console.log(arr); // 输出: [1, 2, 3, 4, 5](原数组未改变) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. ...
let arr = [1, 2, 3, 4, 5]; let reversedArr = reverseArrayWithoutMutating(arr); console.log(reversedArr); // 输出: [5, 4, 3, 2, 1] console.log(arr); // 输出: [1, 2, 3, 4, 5](原数组未改变) 字符串去重:使用Set或遍历字符串,利用对象记录字符出现情况,实现去重。 function un...
JavaScript provides built-in methods likejavascript reverse array()for arrays, which directly modify the original array by reversing its elements. Immutable Approaches: Functional programming techniques involve creating new arrays with reversed elements without mutating the original array, ensuring data integr...
需要注意的一点是它会改变原始数组。Stack Overflow: Reverse array in Javascript without mutating original array
You can also use the Spread operator (three dots in JavaScript) to avoid mutating the state. Using theslice()method is cleaner though, it also reverses array without modifying. computed:{messages(){return[...this.$store.getters.products].reverse()}} ...
The Array object has always had some oddities. Methods likesort,reverse, andsplicechange the array in place. Other methods likeconcat,map, andfiltercreate a copy of the array and then operate on the copy. When you perform an operation on an object that mutates it, that is a side effect...
JavaScript offers many ways to remove an item from an array. Learn the canonical way, and also find out all the options you have, using plain JavaScriptHere are a few ways to remove an item from an array using JavaScript.All the method described do not mutate the original array, and ...
When called without any parameters, thesortmethod converts the array elements to strings (if necessary) and sorts them according to their UTF-16 code unit values. TheArray.reverse()method reverses the array in place and returns the result. ...
var rev = invoker('reverse', Array.prototype.reverse); _.map([[1,2,3]], rev); //=> [[3,2,1]] While it’s perfectly legitimate to directly invoke a particular method on an instance, a functional style prefers functions taking the invocation target as an argument. Taking advantage of...