mongodb shell is written in JavaScript. Why UNIX binary then?

Question

Is that true, that MongoDB shell is written in JavaScript?

If yes why it's a UNIX binary? Not a webapp for browser?

> less /usr/local/bin/mongo                            
"/usr/local/bin/mongo" may be a binary file.  See it anyway?       
> file /usr/local/bin/mongo                            
/usr/local/bin/mongo: Mach-O 64-bit executable x86_64

The mongo shell accepts JavaScript code. What makes you think it is implemented in JavaScript? This is like thinking the bash shell (which is implemented in C) was implemented in bash script... — ericbn
– ericbn, Commented Jun 19, 2015 at 18:16
Furthermore, Javascript runs on UNIX outside the browser as well... — deceze
– deceze ♦, Commented Jun 19, 2015 at 18:20
@fyodor78 Maybe you should learn from the pros university.mongodb.com - free, packed with information, and done by the vendor. You can't ask for more. — Markus W Mahlberg
– Markus W Mahlberg, Commented Jun 20, 2015 at 23:01

ericbn · Accepted Answer · 2015-06-19 18:24:48Z

2

The mongo shell, as well as the mongod database process are implemented in C++. You can get the source code and build it yourself here: https://github.com/mongodb/mongo

answered Jun 19, 2015 at 18:24

ericbn

11.2k7 gold badges53 silver badges65 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

nexus Over a year ago

This is not true! For instance, this is the implementation of the .count() method: github.com/mongodb/mongo/blob/master/src/mongo/shell/… - JavaScript! You will see the same when you enter this in the mongo shell: db.myCollection.find().count

ericbn Over a year ago

@nexus, most of the API is written in JavaScript, but the shell that runs those functions is written in C++.

Collectives™ on Stack Overflow

mongodb shell is written in JavaScript. Why UNIX binary then?

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related