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What's the difference between findAndModify and update in MongoDB?
...e cases. Migrating our application from Couchbase to MongoDB, I found this API to replace the code which does GetAndlock(), modify the content locally, replace() to save and Get() again to fetch the updated document back. With mongoDB, I just used this single API which returns the updated document.
...
Break promise chain and call a function based on the step in the chain where it is broken (rejected)
...s promise library $q is based on kriskowal's Q library (which has a richer API, but contains everything you can find in $q). Q's API docs on GitHub could prove useful. Q implements the Promises/A+ spec, which goes into detail on how then and the promise resolution behaviour works exactly.
EDIT:
Al...
地图组件（高德地图） · App Inventor 2 中文网
... 服务生成两个地点之间的路线。必须提供该服务的有效 API 密钥才能使此组件正常工作。
属性
ApiKey
高德地图路径规划服务的 API 密钥，获取 API 密钥。
起点纬度
起始位置的纬度。
起点经度
起始位...
Should functions return null or an empty object?
...e to throw an exception.
Based on extensive comments below: if this is an API-level design question, this method could be analogous to "OpenFile" or "ReadEntireFile". We are "opening" a user from some repository and hydrating the object from the resultant data. An exception could be appropriate in ...
What are the differences between the different saving methods in Hibernate?
...
Here's my understanding of the methods. Mainly these are based on the API though as I don't use all of these in practice.
saveOrUpdate
Calls either save or update depending on some checks. E.g. if no identifier exists, save is called. Otherwise update is called.
save
Persists an entity. Wi...
Difference between Destroy and Delete
...troy runs any callbacks on the model while delete doesn't.
From the Rails API:
ActiveRecord::Persistence.delete
Deletes the record in the database and freezes this instance to reflect that no changes should be made (since they can't be persisted). Returns the frozen instance.
The row is ...
What is the difference between JDK and JRE?
...
I have worked on JExcel API and I've set the classpath correctly and still there exists the problem. So i deployed it inside tlib/ext folder, which woks fine after that?? So what would be reason??
– i2ijeya
Dec...
When do Java generics require
...ownside of really accepting anything when T is an Object, which is not the APIs intent. The intent is to statically ensure that the matcher matches the actual object, and there is no way to exclude Object from that calculation.
The answer to the third question is that nothing would be lost, in term...
When do I need to use AtomicBoolean in Java?
...f threads are
running through your code that uses
these atomic concurrency API, they
will scale much better than code
which uses Object level
monitors/synchronization. Since,
Java's synchronization mechanisms
makes code wait, when there are lots
of threads running through your
critical sections, a s...
How do sessions work in Express.js with Node.js?
... that could be altered to whatever storage form implements the appropriate API.
So if you want to check things without a specific req request object, like you said, you need to just access that same storage. On the bottom of the first documentation page, it details required methods the storage nee...