Underscore body mixin. Returns the middle part of an Array (between last/tail and first/head)

gistfile1.txt

_.mixin({
  body : function(array, fromHead, fromTail) {
    fromHead = (_.isUndefined(fromHead)) ? 1 : fromHead;
    fromTail = (_.isUndefined(fromTail)) ? 1 : fromTail;
    if (array.length < 2) return [];
    return array.slice(fromHead, array.length-fromTail-1);
  }
});