如何在JS中将字符串（带前缀的数字）转换为Double / Float

Question

如何将带前缀的数字转换为double/float，例如STA01.02到1.02？

Answer 1

使用正则表达式去除非数字（不包括＆＃34;。＆＃34;）以获得更灵活的解决方案：

parseFloat("STA01.02".replace(/[^0-9\.]+/g, ''));

Answer 2

如果前缀始终相同......

var str = "STA01.02";
var number = parseFloat(str.substring(3));

Answer 3

// Assumed "STA0" is the fixed-length prefix, you can adjust the substring at the start you're getting rid of.

var myString = "STA01.02"; 
var noPrefix = myString.substring(4); // Just "1.02" 
var myNumber = parseFloat(noPrefix); 
console.log(myNumber); // Prints 1.02