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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.
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CORS - What is the motivation behind introducing preflight requests?
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There are probably APIs out there which rely on the browser's same-origin policy to protect their resources. They should have additional security, but they rely on the same-origin policy instead. Without the preflight, a user on a different dom...
How does mockito when() invocation work?
... this anti-pattern design is a great design, since it leads to very simple API.
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WebSockets vs. Server-Sent events/EventSource
...estion.
One reason SSEs have been kept in the shadow is because later APIs like WebSockets provide a richer protocol to perform bi-directional, full-duplex communication. Having a two-way channel is more attractive for things like games, messaging apps, and for cases where you need near real-ti...
How to convert java.util.Date to java.sql.Date?
... Java SE 9, Java SE 10, Java SE 11, and later - Part of the standard Java API with a bundled implementation.
Java 9 brought some minor features and fixes.
Java SE 6 and Java SE 7
Most of the java.time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport.
Android
Later versions...
开源MQTT网关：EMQX vs Mosquitto - 创客硬件开发 - 清泛IT社区，为创新赋能！
... 为用户提供了黑名单功能，用户可以通过 Dashboard 和 HTTP API 将指定客户端加入黑名单以拒绝该客户端访问，除了客户端标识符以外，还支持直接封禁用户名甚至 IP 地址，方便用户灵活管理客户端的连接与访问。数据集成Mosquitto ...
What is the difference between declarative and imperative programming? [closed]
...hods. It's not using the C# language features, but rather the declarative API. I did not want to mix messages here, which is why I avoided the language additions built on top of the declarative methods.
– Reed Copsey
Nov 24 '09 at 0:14
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Eclipse compilation error: The hierarchy of the type 'Class name' is inconsistent
... this was my issue. I included GWT libs, but was missing the Java servlet API jar (servlet-api-3.1.jar from Jetty in this case).
– Jamie
Sep 6 '16 at 14:45
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Python __call__ special method practical example
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Django forms module uses __call__ method nicely to implement a consistent API for form validation. You can write your own validator for a form in Django as a function.
def custom_validator(value):
#your validation logic
Django has some default built-in validators such as email validators, ur...
Application Skeleton to support multiple screens
... GsmArena
Sameway you can also create folder according to Device's Android API version i.e. drawable-hdpi-v11` so the device which is having API11 and it is Hdpi then it will use this resources.
Additional Tips:
Use relative layouts, dp, sp, and mm
dp units - device independent pixels normalised...