var d3_array = d3_arraySlice; // conversion for NodeLists

function d3_arrayCopy(psuedoarray) {

var i = -1, n = psuedoarray.length, array = [];

while (++i < n) array.push(psuedoarray[i]);

return array;

}

function d3_arraySlice(psuedoarray) {

return Array.prototype.slice.call(psuedoarray);

}

try {

d3_array(document.documentElement.childNodes)[0].nodeType;

} catch(e) {

d3_array = d3_arrayCopy;

}