问题
I have to "get at" an array, but all I have is a string that matches the array name. Obviously this kind of thing won't work, but it shows what I'm trying to do:
var arrayname = new Array(1, 2, 3);
var array = 'arrayname';
Alert(array[0]);
Of course, the example above yeilds 'a' instead of 1, like I'd need.
The background is that I'm working with a Hyperion Business Intelligence dashboard, where which array used, is determined by a substring of the button's name that was used to call it.
回答1:
It's very simple.
var storage = {};
storage.arrayname = [1, 2, 3];
alert(storage["arrayname"].join(','));
Polluting the global namespace is strongly discouraged. I would strongly advise you to refrain from using the window object for this purpose. Read HERE for more details.
回答2:
Try using the window object to retrieve it if it is defined in the window context.
var array = window["arrayname"]
回答3:
You can use
array = window['arrayname'];
来源：https://stackoverflow.com/questions/16282045/javascript-array-name-as-string-need-it-to-reference-the-actual-array