_.toQuery fails on empty arrays, _.fromQuery fails on empty params

[viperet]

When I try to convert object, consisting of empty arrays - _.toQuery() gives me && in place of them:
_.toQuery({a:[], b:[], c:[]})
"&&"
But it should return just empty string or "a=&b=&c=", not just ampersands.
And when I try to convert such query string back with _.fromQuery - it fails with JS error
'underscore-contrib.min.js:8Uncaught TypeError: Cannot read property 'replace' of undefined'

see jsfiddle https://jsfiddle.net/cp3p7jkc/

[viperet]

Maybe this is supposed to work this way to be compatible with nodejs querystring.stringify()

> require('querystring').stringify({ a: [], b: [], c: [], d: [], n: [] });
'&&&&'

But in nodejs there is proposition to add optional parameter that, if 'true' should remove all undefined, null, NaN and empty arrays from output.

[viperet]

In opposite to querystring.stringify, jQuery.param skips empty arrays but leaves null and undefined:

jQuery.param({x:0, y:1, a:[], b:undefined, c:null})
"x=0&y=1&b=&c="