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add created_at and updated_at fields to mongoose schemas
...pdated_at fields to a mongoose schema, without having to pass them in everytime new MyModel() is called?
19 Answers
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What's the difference between libev and libevent?
...hreaded environments, watcher structures are big because they combine I/O, time and signal handlers in one, the extra components such as the http and dns servers suffered from bad implementation quality and resultant security issues, and timers were inexact and didn't cope well with time jumps.
Lib...
What is the difference between a HashMap and a TreeMap? [duplicate]
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HashMap is more time-efficient. A TreeMap is more space-efficient.
– erickson
Mar 15 '10 at 0:21
42
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Hibernate Error: org.hibernate.NonUniqueObjectException: a different object with the same identifier
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I have had this error many times and it can be quite hard to track down...
Basically, what hibernate is saying is that you have two objects which have the same identifier (same primary key) but they are not the same object.
I would suggest you break ...
Using an RDBMS as event sourcing storage
...al Aggregate Root.)
Table Events:
Id [uniqueidentifier] NOT NULL,
TimeStamp [datetime] NOT NULL,
Name [varchar](max) NOT NULL,
Version [varchar](max) NOT NULL,
EventSourceId [uniqueidentifier] NOT NULL,
Sequence [bigint],
Data [nvarchar](max) NOT NULL
Table EventSou...
What are the differences in die() and exit() in PHP?
...rting with "d", and a shorter list starting with "e", then there must be a time penalty looking up the function name for functions starting with "e". And there may be other differences due to how the whole function name is checked.
I doubt it will be measurable unless you have a "perfect" environme...
Center Align on a Absolutely Positioned Div
...that, even though we use the same technique for vertical centering all the time... Thanks anyway, you saved me a lot of time.
– Aayush
Aug 31 '10 at 10:19
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Trying to mock datetime.date.today(), but not working
...ed as a decorator, it replaces the given function/class (in this case, datetime.date.today) with a Mock object only within the decorated function. So, only within your today() will datetime.date.today be a different function, which doesn't appear to be what you want.
What you really want seems to b...
Refresh a page using PHP
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You can do both although I prefer no wait time with: header("Location: ".$_SERVER['PHP_SELF']);
– John Magnolia
Feb 24 '14 at 11:08
4
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Do HTML WebSockets maintain an open connection for each client? Does this scale?
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Each HTTP connection carries a lot of baggage that isn't used most of the time: cookies, content type, conetent length, user-agent, server id, date, last-modified, etc. Once a WebSockets connection is established, only the data required by the application needs to be sent back and forth.
Typically...