数组中每个元素的数字之和 [英] Sum of a number for each element in an array

问题描述

我正在一个redux函数中工作，我想为数组中的每个元素添加n个数字

I am working in a redux function where i want for each element in array the sum with n number

这是代码

let neWd = array.map(x => {
  if (x === 'M' || x === 'L'){
    return x;
  }else{
    return x + 5;
  }
}).join(' ')

此刻 return x + 5 正在添加 5 数字到数组的任何元素，但不是总和。

At the moment return x + 5 is adding the 5 number to any element of the array but not the sum.

我如何实现？

推荐答案

假设你有一个字符串，它被分割成''，然后你将每个元素作为字符串。您需要将其转换为一个数字，在本示例中，与 5 递增的一元 +

Assuming you have a string and it is splitted with ' ' and then you get each element as string. You need to cast it to a number, in this example with an unary + for incrementing with 5.

此提案分割为空格，可以是多个字符长。

This proposal splits on white space, which can be more than one characters long.

var string = 'M 175 0  L 326.55444566227675 87.50000000000001  L 326.55444566227675 262.5  L 175 350  L 23.445554337723223 262.5  L 23.44555433772325 87.49999999999999 L 175 0',
    array = string.split(/\s+/),
    result = array.map(x => x === 'M' || x === 'L' ? x : +x + 5).join(' ');

console.log(result);

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