...tricks. The key here is the oplog. When you run MongoDB in a Replica Set, all of the MongoDB actions are logged to an operations log (known as the oplog). The oplog is basically just a running list of the modifications made to the data. Replicas Sets function by listening to changes on this oplog a...

... If you update your libs, you want to commit the lockfile too. It basically states that your project is locked to those specific versions of the libs you are using. If you commit your changes, and someone pulls your code and updates the dependencies, the lockfile should be unmodified. If it is ...

...it. Try this: sudo docker pull ubuntu sudo docker run ubuntu apt-get install -y ping Then get the container id using this command: sudo docker ps -l Commit changes to the container: sudo docker commit <container_id> iman/ping Then run the container: sudo docker run iman/ping ping w...

Hey all. I'm still pretty new to iPhone development, and I'm having a bit of trouble figuring out how to change the title of my Navigation Bar. On another question on this site somebody recommended using : ...

...my rationale. I had not meant to be defensive in responding to him. After all, in my younger years, I would have written the command as grep foo file.txt | cut ... | cut ... because whenever you do the frequent single greps you learn the placement of the file argument and it is ready knowledge that...

...ctor or in the prototype. Using the prototype is more efficient because usually you need a function only once per type. The new call in javascript automatically sets the constructor in the prototype. If you are overwriting the prototype so you have to set the constructor manually. Inheritance in j...

...ject) isn't special to the compiler. It could be optimized when used statically (i.e. Foo.class.cast(o) rather than cls.cast(o)) but I've never seen anybody using it - which makes the effort of building this optimization into the compiler somewhat worthless. ...

...ur goal is to avoid a def, this obviously doesn't cut it. It does, however allow you to conditionally raise exceptions, e.g.: y = lambda x: 2*x if x < 10 else raise_(Exception('foobar')) Alternatively you can raise an exception without defining a named function. All you need is a strong stom...

So I know we can center a div horizontally if we use margin:0 auto; . Should margin:auto auto; work how I think it should work? Centering it vertically as well? ...

... ends up as a more complex (in terms of execution time) shuffle than you really need. I prefer the shuffle algorithm which effectively partitions the collection into "shuffled" (at the start of the collection, initially empty) and "unshuffled" (the rest of the collection). At each step of the algori...