javascript - underscore _.filter condition -

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is possible using underscore _.filter?

self.getcols = function (columnid) { return cols = _.filter(self.model.cols(), function(c) {     return (             (c.id === self.model.id()) &&             ((columnid === undefined) ? '' : c.columnid === columnid)                ); });

};

right condition i'm using on columnid not valid. sorry bad, edited in proper way.

in case return should (i think):

return c.columnid || c.id === self.model.id();

thats assuming 'columns specify' interpreted column id property equal self.model.id()


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