Arrays in JavaScript
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by caramel1991
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Published on 2010-03-16T16:53:26Z
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2010/03/16
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JavaScript
While reading a book about JavaScript I stumbled across an example:
var names = new Array("Paul","Catherine","Steve");
var ages = new Array(31,29,34);
var concatArray;
concatArray = names.concat(ages);
My question is, why doesn't the variable concatArray
need to be define as a new Array()
in order to store the concatenated data for both arrays name and ages , but when I try to treat the concatArray
as an array by adding another line of code "document.write(concatArray[0])
", it works just like an array and shows me the data stored in the first element. I just wonder why I'm not declaring the concatArray
as a new array, yet it still works as one.
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