如何在Javascript中将一个字符串拆分为两个浮点数？

Question

function xyDistance(from,to){
var s=from.split(",");
var x1=parseFloat(s[0]);
 var y1=parseFloat(s[1]);


 var dt = Math.sqrt( (x2-x1)**2+(y2-y1)**2);
 return dt;
}

I will enter the two coordinates as a string. I have split them, but I don't know how to separate the X and Y coordinates of two points.The photo shows the input value and expected output value.

Answer 1

For each from , to , you just have to split it and parseInt

 function xyDistance(from, to) { var [x1, y1] = from.split(",").map(axis => parseInt(axis, 10)); var [x2, y2] = to.split(",").map(axis => parseInt(axis, 10)); var dt = Math.sqrt((x2 - x1) ** 2 + (y2 - y1) ** 2); return dt; } console.log(xyDistance('1,1', '0,0'))

Answer 2

I'm not sure what your algorithm is supposed to be doing, but to get the x,y coords of both, just do a split on each argument. And, fyi, all numbers in JavaScript are floating point (whole numbers just aren't displayed with decimals unless you format them to).

 function xyDistance(from,to){ var f = from.split(","); var x1 = parseFloat(f[0]); var y1 = parseFloat(f[1]); var t = to.split(","); var x2 = parseFloat(t[0]); var y2 = parseFloat(t[1]); console.log("from x,y are: " + x1 + ", " + y1); console.log("to x,y are: " + x2 + ", " + y2); } xyDistance("1,1","0,0"); xyDistance("1,1","-1,-1");

Answer 3

 function xyDistance(from,to){ const [x1, y1] = from.split(","); const [x2, y2] = to.split(","); const dt = Math.sqrt((x2-x1)**2+(y2-y1)**2); return dt; } console.log(xyDistance("2,1", "0,1"))

try above code, no need to parse float

Answer 4

You could split the values and take the delta of same index as value for Math.hypot .

 function xyDistance(from, to) { const f = from.split(','); t = to.split(','); return Math.hypot(f[0] - t[0], f[1] - t[1]); } console.log(xyDistance("1,1", "0,0")); console.log(xyDistance("1,1", "-1,-1"));

Answer 5

This code will work

function xyDistance(from,to){
var f=from.split(",");
var fx=parseFloat(f[0]);
var fy=parseFloat(f[1]);

var t=to.split(",");
var tx=parseFloat(t[0]);
var ty=parseFloat(t[1]);


 var dt = Math.sqrt( (fx-tx)**2+(fy-ty)**2);
 return dt;
}