JavaScript function to select from array of objects

object-select.js

function select (a) {
  return {
  from : function (b) {
    return {
    where : function (c) {
      return {
      equals : function (d) {
        var foo = [];
        for (prop in b){
          if (b[prop][c] == d){
            foo.push(b[prop][a]);
          }
        }
        return foo;
      },
      contains : function (d) {
        var foo = [];
        for (prop in b){
          if (b[prop][c].indexOf(d) != -1){
            foo.push(b[prop][a]);
          }
        }
        return foo;
      }
      }
    }
    }
  }
  }
}