TypeScript：获取表中的值时未定义的值

Question

How can I get value of table in typeScript, ?

myComponent.ts :

let jsonUsers = [];
getUser() {

// When I do this console ==> I get response on the picture
 console.log(this.jsonUsers );

// Now I want to get value of code and label but it is not worked 
 console.log(jsonUsers.length); // ==> 0
 for (var index = 0; index < this.jsonUsers .length; index++) {
      var element = this.jsonUsers [0];
      console.log(element.code);
 }

Answer 1

looks like that array has no elements on it, those that you see in the console's output are object's keys. Try something like this, and let us know what you see

let jsonUsers = [];
getUser() {
    const keys = Object.keys(this.jsonUsers);
    keys.forEach((k, i) => {
        const element = this.jsonUsers[k];
        console.log(element.code)
    })
}

or another option could be using for...in

let jsonUsers = [];
getUser() {
    for (let k in this.jsonUsers) {
        const element = this.jsonUsers[k];
        console.log(element.code)
    }
}

note that this.jsonUsers is a different variable than jsonUsers , keep that in mind