Filter empty elements from an Array or csv string/file

gistfile1.js

//lo sauer 2011 - lsauer.com
//join() is by default: join(',')
[1,2,,3,,3,,,0,,,4,,4,,5,,6,,,,,8,,,-2].filter(String).join()
>>>"1,2,3,3,0,4,4,5,6,8,-2"

//same result for: filter(function(){return 1});
[1,2,,3,,3,,,0,,,4,,4,,5,,6,,,,,8,,,-2].filter(function(){return 1}).join()
>>>"1,2,3,3,0,4,4,5,6,8,-2"

//to conveniently eliminate null-elements...
[1,2,,3,,3,,,0,,,4,,4,,5,,6,,,,,8,,,-2].filter(Number).join()
>>>"1,2,3,3,4,4,5,6,8,-2"

//same result for function(e){return e};
[1,2,,3,,3,,,0,,,4,,4,,5,,6,,,,,8,,,-2].filter(function(e){return e}).join()
>>>"1,2,3,3,4,4,5,6,8,-2"

//both methods also get rid off undefined, null etc...
[1,2,,3,,3,,,0,,,4,,4,,5,,6,,,,,8,,,undefined,,null,,-2,].filter(Number).join()
>>>"1,2,3,3,4,4,5,6,8,-2"

//------CSV---------
//when starting out with a csv-string...
"1,2,,3,3,3,,,0,,,4,,4,,5,,6,,,,,8,,,-2".split(',')
>>>["1", "2", "", "3", "3", "3", "", "", "0", "", "", "4", "", "4", "", "5", "", "6", "", "", "", "", "8", "", "", "-2"]

//heed the missing numbers, due to the difference in the arguments passed: [val, key, obj]
//parseInt's second parameter is the base to which the Number should be converted to
// see http://lsauer.com/2011/09/javascript-binary-to-int-hex-decimal.html
"1,2,,3,3,3,,,0,,,4,,4,,5,,6,,,,,8,,,-2".split(',').filter(parseInt)
>>>["1", "3", "3", "4", "4", "5", "6", "8", "-2"]

//parseFloat has no base argument as second parameter
"1,2,,3,,3,,,0,,,4,,4,,5,,6,,,,,8,,,-2".split(',').filter(parseFloat)
>>>["1", "2", "3", "3", "4", "4", "5", "6", "8", "-2"]

//putting it all together:
"1,2,,3,3,3,,,0,,,4,,4,,5,,6,,,,,8,,,-2".split(',').filter(Number).map(parseFloat)
>>>[1, 2, 3, 3, 3, 4, 4, 5, 6, 8, -2]

//retaining zero values
"1,2,,3,3,3,,,0,,,4,,4,,5,,6,,,,,8,,,-2".split(',').filter(String).map(parseFloat)
>>>[1, 2, 3, 3, 3, 0, 4, 4, 5, 6, 8, -2]

//string-padded example, with the first and last element not being parsable
"start {[1,2,,3,3,3,,,0,,,4,,4,,5,,6,,,,,8,,,-2]dsfdsf".split(',').filter(Number).map(parseFloat)
[2, 3, 3, 3, 4, 4, 5, 6, 8]
//using phptrim (see my other gists)...
"start {(1,2,,3,3,3,,,0,,,4,,4,,5,,6,,,,,8,,,-2)dsfdsf".phptrim('{stardsf{}() ').split(',').filter(Number).map(parseFloat)
>>>[1, 2, 3, 3, 3, 4, 4, 5, 6, 8, -2]