大约有 33,000 项符合查询结果（耗时：0.0387秒） [XML]
Mongoose query where value is not null
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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...
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...
Why is 128==128 false but 127==127 is true when comparing Integer wrappers in Java?
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When you compile a number literal in Java and assign it to a Integer (capital I) the compiler emits:
Integer b2 =Integer.valueOf(127)
This line of code is also generated when you use autoboxing.
valueOf is implemented such that certain numbers are "pooled", and it returns the same instance f...
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
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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 ...
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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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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How do I prevent node.js from crashing? try-catch doesn't work
...e as you can read at Node's own documents at http://nodejs.org/docs/latest/api/process.html#process_event_uncaughtexception
If someone is using other stated answers read Node Docs:
Note that uncaughtException is a very crude mechanism for exception handling and may be removed in the future
PM...
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...
Core Data vs SQLite 3 [closed]
...ects framework, an open source implementation of a subset of the Core Data API. The BaseTen framework is also an implementation of the Core Data API using PostgreSQL as a backend.
Because Core Data is not intended to be an ORM for SQLite, it cannot read arbitrary SQLite schema. Conversely, you shou...