shit.js

var columns = [
    {id: 1234567890, title: "shittily named title"},
    {id: 0987654321, title: "shitty title 2"}
];

var mapping_table = {
    mapped_column1_name: "shitty title 2",
    mapped_column2_name: "shittily named title"}
};


//This is the outcome I want
var column_id_map = { 
    mapped_column1_name: 0987654321,
    mapped_column2_name: 1234567890
}

//Here's how I'm doing it in 3 lines
_.each(mapping_table, function (column_title, column_name) {
    column_id_map[column_name] = _.result(_.find(columns, { 'title': column_title}), 'id');
});

//Slightly better with LoDash
sheet.column_ids = _.object(_.keys(sheet.column_names), _.map(sheet.column_names, function(title) {return _.result(_.find(columns, { 'title': title}), 'id');}));

/*
Using _.object, I can do _.object(_.keys(mapping_table), ARRAY_OF_VALUES)
to get something like

{
  mapped_column1_name:
  mapped_column2_name:
}

But I need to somehow apply the value from mapping_table to the columns array.
_.result(_.find(columns, { 'title': "shittily named title"}), 'id');
// → 1234567890
*/