get maximum length of JavaScript array element
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If I have the following array : array = ['a', 'abcde', 'ab'] ; I would like to get the maximum length of the array elements ie 5 (for the element 'abcde'). I know that you can get the length of an array element via (eg) array[1].length but I don't know how to get the maximum length. Any answer in JavaScript or jQuery would be great. TIA Paul Jones
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Answer:
One-liner for you: Math.max.apply(Math, $.map(array, function (el) { return el.length })); Working example: http://jsfiddle.net/5SDBx/ You can do it without jQuery in newer browsers (or even older browsers with a https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/map#Compatibility of Array.prototype.map) too: Math.max.apply(Math, array.map(function (el) { return el.length }));
Paul Jones at Stack Overflow Visit the source
Other answers
One (possibly rubbish) way of doing that, without using Jquery: var myarray = ['a','abcde','ab']; var maxlen = 0; for (i=0; i<myarray.length; i++) { if (myarray[i].length>maxlen) { maxlen = myarray[i].length; } }
jayp
You could use jQuery's http://api.jquery.com/jQuery.each/ to iterate a little nicer. var maxLength = 0; $.each(array, function(i, item) { maxLength = Math.max(maxLength, item.length); }); Or plain ol' JavaScript... var maxLength = 0; for (var i = 0, length = array.length; i < length; i++) { maxLength = Math.max(maxLength, array[i].length); };
alex
There are several ways to do that. I would iterate through all the array elements and store the longest element in a local variable. You get the longest element by comparing the first array element with the second, then storing the longer one. Then go on and compare each element with the longest one so far. You just need one loop to do that.
Patrick
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