typescript - TypeScript将字符串转换为数字(TypeScript Converting a String to a number)

Question

Anyone a suggestion on how to convert a string to a number in TypeScript?

(有人建议如何将字符串转换为TypeScript中的数字？)

var aNumber : number = "1"; // --> Error

// Could this be done?
var defaultValue = 0;
var aNumber : number = "1".toInt32(defaultValue);

// Or ..
var defaultValue = 0;
var aNumber : number = StringToInt("1", defaultValue);

Update: I did some extra puzzling, the best sofar I've come up with: var aNumber : number = ( "1") * 1;

(更新：我做了一些额外的困惑，我想出的最好的音乐：var aNumber：number =（“1”）* 1;)

checking if a string is numeric is answered here: In Typescript, How to check if a string is Numeric .

(检查字符串是否为数字在此处回答： 在Typescript中，如何检查字符串是否为数字 。)

  ask by Paul0515 translate from so

Answer 1

You can use the parseInt or parseFloat functions, or simply use the unary + operator:

(您可以使用parseInt或parseFloat函数，或者只使用一元+运算符：)

var x = "32";
var y = +x; // y: number