Question

var objectHTMLCollection = document.getElementsByTagName("select"),
string = [].map.call( objectHTMLCollection, function(node){
    return node.id || "";
}).join(" ");

我有这个代码将[object HTMLCollection]转换为我希望将其转换为数组的字符串。所以说他们的输出hello world I am here会变成[hello,world,I,am,here]

Answer 1

您可以使用split(" ")

var stringArray = string.split(" ");

或者您可以在准备字符串时准备数组，请参阅下面的代码

var stringArray = new Array();
var objectHTMLCollection = document.getElementsByTagName("select"),
string = [].map.call( objectHTMLCollection, function(node){
    stringArray.push(node.id);
    return node.id || "";
}).join(" ");

Answer 2

Map已经返回一个数组。无需将其转换为字符串，然后再将其转换为数组。

var objectHTMLCollection = document.getElementsByTagName("select"),
idarray = [].map.call( objectHTMLCollection, function(node){
    return node.id || "";
}), string = idarray.join(' ');

document.write('<div>String: ' + string + '<div>');
document.write('Array: ' + JSON.stringify(idarray) + '<div>');

<select id='dsada1'></select>
<select id='dsada2'></select>
<select></select>
<select id='dsada4'></select>
<select id='dsada5'></select>
<select id='dsada6'></select>
<br/><br/>

将字符串转换为数组

2 个答案: