How to convert nested array pairs to objects in an array

Programmatic solution (available too at https://jsfiddle.net/edorka/jnLxyzhb/):

var arr = [[ ['firstName', 'Joe'], ['lastName', 'Blow'], ['age', 42], ['role', 'clerk']], [['firstName', 'Mary'], ['lastName', 'Jenkins'], ['age', 36], ['role', 'manager'] ]];

var empty = {};
var result = arr.map(function(objectArray){
    var object = this;
    var attribute = objectArray.map(function(attrArray){
        var name = attrArray[0], value = attrArray[1];
        object[name] = value;
        return object;
    }, object);
    return this;
}, empty);

console.log(result);