javascript - 如何在javascript中使用对象值作为对象名称？

Question

如何使用对象值作为对象名称

像这样

$.each(columns, function(index, value) {
    var objectName = value.object; // need to pass this 
    to the next $.each
    //lets say i'm expecting objectName = x 
    $.each(values, function(i, v) {
        // console.log(v.x) ; // this works fine 
        console.log(v.objectName);
    });
});​

我尝试过toString()但没有成功谢谢

Answer 1

使用变量(标识符)而不是实际对象属性时使用方括号表示法

console.log(v[objectName])

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有关主题的进一步引用:http://www.jibbering.com/faq/faq_notes/square_brackets.html

String Variables as Identifiers
The string used within the square brackets does not need to be a string literal. It can be any expression that results in a string. This is where the square bracket notation becomes most useful as the expression could be a reference to a string variable that holds the property name as its value, or a function call that returns a string, or an expression that concatenates two strings, or any combination of these [...]