I want to get data from a data array by an array selector:
var sel = ["node1"]["node2"]["node3"];
var my_data = data_array[sel] //?!?
How to get a correct my_data?
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show data array structure pleaseBeNdErR– BeNdErR2014-01-19 14:06:33 +00:00Commented Jan 19, 2014 at 14:06
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What is sel expected to look like? "node1node2node3" or "node1, node2, node3"?Ke Vin– Ke Vin2014-01-19 14:07:01 +00:00Commented Jan 19, 2014 at 14:07
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the "sel" structure is always different, it depends on "data_array".bergman– bergman2014-01-19 14:07:27 +00:00Commented Jan 19, 2014 at 14:07
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it should work like: var my_data = data_array["node1"]["node2"]["node3"];bergman– bergman2014-01-19 14:08:08 +00:00Commented Jan 19, 2014 at 14:08
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2 Answers
What about this idea?
Object.prototype.getBySelector = function(selector) {
var currentElement = this;
for (var i = 0; i < selector.length; i++)
currentElement = currentElement[selector[i]];
return currentElement;
}
var sel = ["node1","node2","node3"];
var my_data = data_array.getBySelector(sel);
You can easily extend the getBySelector function by checking, if the nodes are existing and returning null, so no exception is thrown on an invalid selector.
See my jsfiddle: http://jsfiddle.net/U8YDQ/
1 Comment
bergman
thats very nice. But expensive for my needs, since there is much data to process.
Its a wild-wild guess. You can try eval()
var sel = '["node1"]["node2"]["node3"]';
var my_data = eval('data_array' + sel);
3 Comments
bergman
i think this would work. I try not to use eval(). So i will do a workaround.
Satpal
@bergman, it works see jsfiddle.net/U8YDQ/2. And do share what is your workaround
bergman
Hi thx for the fiddle. My workaround is passing the "data_array" around: var my_data = data_array["node1"]["node2"]["node3"]; :)