Question

代码：

var a = ["a", "b", "c"];
 for (i=0; i<a.length; i++){
 alert (a[i]);

目前我只得到＆＃39; c＆＃39;在警报中。我想得到他们三个。我该怎么办？

Answer 1

是否有错误或者您想要查看数组中的所有元素？ https://jsfiddle.net/937h2qvr/1/

getAllUser(): Array<UserDTO> {
    this.value = new Array<UserDTO>();
    this.http.get("MY_URL")
                    .map(res => res.json())
                    .subscribe(
                        data => this.value = data,
                        err => console.log(err),
                        () => console.log("Completed")
    );

    return this.value;
}

更新（添加了li）

https://jsfiddle.net/937h2qvr/2/

var a = ["a", "b", "c"];
var result="";
 for (i=0; i<a.length; i++){
 result += " " + a[i];  
}
alert (result);

Answer 2

var text = " ";
var a = ["a", "b", "c"];
for (i = 0; i < a.length; i++) {
 alert(   text += "<li>" + a[i] + "</li>");
}

确定，它有效。

如何显示数组中的所有三个字母？

2 个答案: