TypeScript，JavaScript如何访问lambda变量

Question

interface users {
    s:number;
    b:string;
}

function getPropertyName(propertyFunction: (a:users) => any) {
    console.log(propertyFunction.toString()); // ii => ii.s > x && ii.s < 3
    // how to read x variable here ?
}

(function() {
    var x = 4;
    getPropertyName(ii => ii.s > x && ii.s < 3);
})();

如何在getPropertyName函数中访问变量x？

Answer 1

详细阐述Jeremy Starcher以代码答案形式所说的话。改变你的需求：

function test(func: (x:any, ii:any)=> any){
    //do extra stuff here
}

var x, ii;
test(function (x, ii) {
    //do stuff here
});