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Mongoose query where value is not null
...
You should be able to do this like (as you're using the query api):
Entrant.where("pincode").ne(null)
... which will result in a mongo query resembling:
entrants.find({ pincode: { $ne: null } })
A few links that might help:
The mongoose query api
The docs for mongo query operato...
Android: Clear Activity Stack
...m the doc:
public static final int FLAG_ACTIVITY_CLEAR_TASK
Added in API level 11
If set in an Intent passed to
Context.startActivity(), this flag will cause any existing task that
would be associated with the activity to be cleared before the
activity is started. That is, the acti...
curl_exec() always returns false
...I was following a PDF manual to develop some module to communicate with an API and while copying the link directly from the manual, for some odd reason, the hyphen from the copied link was in a different encoding and hence the curl_exec() was always returning false because it was unable to communica...
What is a handle in C++?
... about the resource itself to use it.
For instance, the HWND in the Win32 API is a handle for a Window. By itself it's useless: you can't glean any information from it. But pass it to the right API functions, and you can perform a wealth of different tricks with it. Internally you can think of the ...
Just what is Java EE really? [closed]
...e a few things wrong with this question:
For compiling you only need the API jar, which is below 1MB for the Web Profile, and a little over 1MB for the full profile.
For running you obviously need an implementation, but "massive" is overstating things. The OpenJDK for example is around 75MB and To...
Representing Directory & File Structure in Markdown Syntax [closed]
... |-- mddir.js
|-- routing.js
|-- server.js
|-- _api
|-- api.groups.js
|-- api.posts.js
|-- api.users.js
|-- api.widgets.js
|-- _components
|-- directives
|-- directives.module.js
...
Is there any good dynamic SQL builder library in Java? [closed]
...e a better choice for hardcore SQL development, but Querydsl has a simpler API and supports also other backends (JPA, JDO, Lucene, Mongodb etc.); I am also in the company behind Querydsl
– Timo Westkämper
Apr 12 '11 at 5:55
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What is WEB-INF used for in a Java EE web application?
...ications come from :
The servlet container (e.g Tomcat) Java Servlet API
Your application domain
The Servlet container requirements
If you use Apache Tomcat, the root directory of your application must be placed in the webapp folder. That may be different if you use another servlet cont...
Get model's fields in Django
...xample, the layout of _meta could change in the future and not be a stable API?
10 Answers
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What is the difference between Elastic Beanstalk and CloudFormation for a .NET project?
...dFormation (CFn) is a lightweight, low-level abstraction over existing AWS APIs. Using a static JSON/YAML template document, you declare a set of Resources (such as an EC2 instance or an S3 bucket) that correspond to CRUD operations on the AWS APIs.
When you create a CloudFormation stack, CloudForma...