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How to select a single field for all documents in a MongoDB collection?
...s and, by default, the _id field return in the matching documents.
db.inventory.find( { type: 'food' }, { item: 1, qty: 1 } )
In this example from the folks at Mongo, the returned documents will contain only the fields of item, qty, and _id.
Thus, you should be able to issue a statement such as:
d...
C# difference between == and Equals()
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When == is used on an expression of type object, it'll resolve to System.Object.ReferenceEquals.
Equals is just a virtual method and behaves as such, so the overridden version will be used (which, for string type compares the contents).
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How to position a DIV in a specific coordinates?
I want to position a DIV in a specific coordinates ? How can I do that using Javascript ?
6 Answers
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How to store arrays in MySQL?
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The proper way to do this is to use multiple tables and JOIN them in your queries.
For example:
CREATE TABLE person (
`id` INT NOT NULL PRIMARY KEY,
`name` VARCHAR(50)
);
CREATE TABLE fruits (
`fruit_name` VARCHAR(20) NOT NULL PRIMARY KE...
Proper use of the HsOpenSSL API to implement a TLS Server
I'm trying to figure out how to properly use the OpenSSL.Session API in a concurrent context
1 Answer
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How do I cancel a build that is in progress in Visual Studio?
...otice a code change. The build dominates my computer, and I basically have to wait till it finishes. 10 seconds!
12 Answers...
What are the pros and cons of both Jade and EJS for Node.js templating? [closed]
... a lot when dealing with complex HTML code.
On the other hand, it is hard to do some simple stuff in Jade, thing like adding classes into a DIV based on a simple if condition. I need to put something like this
- if (isAdmin)
div.admin.user
- else
div.user
Jade also don't differentiate betw...
AWS MySQL RDS vs AWS DynamoDB [closed]
...nd not Join queries), DynamoDB (and other NoSQL DB) is better. If you need to handle a lot of data, you will be limited when using MySQL (and other RDBMS).
You can't reuse your MySQL queries nor your data schema, but if you spend the effort to learn NoSQL, you will add an important tool to your to...
Checkbox for nullable boolean
My model has a boolean that has to be nullable
19 Answers
19
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Best way to compare two complex objects
...the inherited Object.Equals and Object.GetHashCode methods) on all your custom types. In the case of composite types, invoke the contained types’ Equals method within the containing types. For contained collections, use the SequenceEqual extension method, which internally calls IEquatable<T>...