TypeScript Converting a String to a number

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

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;

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

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您可以使用parseInt或parseFloat函数，或者使用一元+运算符：

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

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The Typescript way to do this would be:

Number('1234') // 1234
Number('9BX9') // NaN

as answered here: https://stackoverflow.com/a/23440948/2083492

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For our fellow Angular users:

Within a template , Number(x) and parseInt(x) throws an error, and +x has no effect. Valid casting will be x*1 or x/1 .

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