RunKit + npm: @kingjs/linq

var linq = require('@kingjs/linq'); var sequence = require('@kingjs/sequence'); var apply = require('@kingjs/apply'); //require('@kingjs/define-generator'); var people = sequence( { firstName: 'Bob', lastName: 'Smith', id: 0 }, { firstName: 'Alice', lastName: 'Smith', id: 1 }, { firstName: 'Chris', lastName: 'King', id: 2 }, ); var pets = sequence( { name: 'Tiger', type: 'dog', ownerId: 0 }, { name: 'Spike', type: 'dog', ownerId: 0 }, { name: 'Fluffy', type: 'cat', ownerId: 1 }, { name: 'Bubbles', type: 'fish', ownerId: 2 }, ); apply(people, linq.orderBy, [ function(x) { return x.lastName; } ], linq.thenBy, [ function(x) { return x.firstName; } ], linq.join, [ pets, function(x) { return x.id; }, function(x) { return x.ownerId; }, function(owner, pet) { return { owner: owner, pet: pet } } ], linq.where, [ function(x) { return x.pet.type != 'fish'; } ], linq.select, [ function(x) { var owner = x.owner; var pet = x.pet; return owner.firstName + " " + owner.lastName + ' owns a ' + pet.type + ' named ' + pet.name + '.'; }, ], linq.toArray, [], Array.prototype.join, ['\n'] );