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mongo - couldn't connect to server 127.0.0.1:27017
I am coming from riak and redis where I never had an issue with this services starting, or to interact.
38 Answers
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What do linkers do?
...ages have a standard library of routines to cover the basic stuff expected from that language. The linker links your OBJ file with this standard library. The linker can also link your OBJ file with other OBJ files. You can create other OBJ files that have functions that can be called by another OBJ ...
How to check if a string in Python is in ASCII?
...f-8, or any other encoding. The source of your string (whether you read it from a file, input from a keyboard, etc.) may have encoded a unicode string in ascii to produce your string, but that's where you need to go for an answer.
Perhaps the question you can ask is: "Is this string the result of e...
Why is January month 0 in Java Calendar?
...ell be due to old C APIs, or just a general feeling of starting everything from 0... except that days start with 1, of course. I doubt whether anyone outside the original implementation team could really state reasons - but again, I'd urge readers not to worry so much about why bad decisions were ta...
How do you add swap to an EC2 instance?
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That dd command line means "copy from /dev/zero to /var/swap.1. Do that by reading 1024 blocks of size 1 megabyte". It's a quick way to create a 1GB file full of zeroes.
– Nelson
Jan 21 '15 at 4:43
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add created_at and updated_at fields to mongoose schemas
...(),
}
Check my original answer below on how to get the created timestamp from the _id field.
If you need to use IDs from external system, then check Roman Rhrn Nesterov's answer.
UPDATE: (2.5 years later)
You can now use the #timestamps option with mongoose version >= 4.0.
let ItemSchema = n...
Easiest way to convert a List to a Set in Java
...omeComparator);
lSet.addAll(myList);
This depends on either compareTo() (from the comparable interface) or compare() (from the comparator) to ensure uniqueness. So, if you just care about uniqueness, use the HashSet. If you're after sorting, then consider the TreeSet. (Remember: Optimize later!) I...
When to use IComparable Vs. IComparer
...< and > operators (see Code Analysis warning CA1036).
Quoting Dave G from this blog post:
But the correct answer is to implement IComparer instead of IComparable if your objects are mutable, and pass an instance of the IComparer to sorting functions when necessary.
Since the IComparer is just...
Xcode iOS 8 Keyboard types not supported
... I am also getting this on an iPhone 6 with the latest Xcode from the App Store.
– Daniel Wood
Sep 25 '14 at 15:28
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dealloc in Swift
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deinit {
// perform the deinitialization
}
From the Swift Documentation:
A deinitializer is called immediately before a class instance is
deallocated. You write deinitializers with the deinit keyword, similar
to how intializers are written with the init keywor...