如何從數組中檢索和訪問JavaScript對象文字中的字段？

Question

這裏的一個短JS函數試圖從陣列檢索對象並訪問其唯一字段：

function foo() 
{ 
    var fruitLiteral = {name : "Orange"}; 
    var myArray = []; 
    myArray.push(fruitLiteral); 
    console.log(" myArray after push " + myArray); 
    var rc = myArray.splice(0,1); 
    console.log(" myArray after splice " + myArray); 
    console.log(rc.name); 
} 

和輸出：

myArray after push [object Object] 
myArray after splice 
undefined //wanted to see rc.name, or "Orange" here. 

顯示陣列之後如預期已經被排空拼接，但我總是得到「未定義」的項目從拼接檢索時，它是一個文字對象。我的錯誤在哪裏？

Answer 1

問題是您的fruitLiteral仍然作爲rc數組拼接後的第一個元素存儲，因此您需要像這樣對待它。

function foo() 
{ 
    var fruitLiteral = {name : "Orange"}; 
    var myArray = []; 
    myArray.push(fruitLiteral); 
    console.log(" myArray after push " + myArray); 
    var rc = myArray.splice(0,1); 
    console.log(" myArray after splice " + myArray); 
    console.log(rc[0].name); 
}