我如何 return 从一串数字中得到一个浮点数？

Question

当我在控制台中执行 svg.getAttribute("d") 时，我得到一串数字：

"-0.05990783410138251,0.13594470046082952,-0.06912442396313362,0.14976958525345618,-0.07603686635944701,0.15668202764976957,-0.08755760368663595,0.16589861751152069,-0.09677419354838718,0.16820276497695852,-0.10599078341013829,0.16820276497695852,-0.12211981566820279,0.16820276497695852,-0.13594470046082957,0.16820276497695852,-0.14055299539170513,0.16820276497695852 ,-0.14516129032258068,0.16589861751152069,-0.1474654377880184

我想将其转换为浮点数，所以我做了 parseFloat(svg.getAttribute("d")) 但我得到的只是返回的第一个数字：

-0.05990783410138251

我怎样才能得到所有的号码？

谢谢

Answer 1

您可以先使用 split() 函数通过 ',' 拆分字符串，然后可以应用 parseFloat().

Answer 2

使用String.prototype.split() and Array.prototype.map()你可以得到一个浮点值数组如下：

const values = '-0.05990783410138251,0.13594470046082952,-0.06912442396313362,0.14976958525345618,-0.07603686635944701,0.15668202764976957,-0.08755760368663595,0.16589861751152069,-0.09677419354838718,0.16820276497695852,-0.10599078341013829,0.16820276497695852,-0.12211981566820279,0.16820276497695852,-0.13594470046082957,0.16820276497695852,-0.14055299539170513,0.16820276497695852,-0.14516129032258068,0.16589861751152069,-0.1474654377880184';

const floats = values.split(',').map(parseFloat);

console.log(floats);

Answer 3

您需要先将其转换为字符串数组，然后才能单独解析它们。像这样：

var str = svg.getAttribute("d");
var strNums = str.split(',');
var nums = strNums.map(function (num) {
    return parseFloat(num);
});

Answer 4

const numArray = thatStringOfNumbers.split(',').map((num) => parseFloat(num))

我如何 return 从一串数字中得到一个浮点数？

How can i return a float from an a string of numbers?

javascript

int

parsefloat