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LINQ Ring: Any() vs Contains() for Huge Collections
Given a huge collection of objects, is there a performance difference between the the following?
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Linq select objects in list where exists IN (A,B,C)
I have a list of orders .
I want to select orders based on a set of order statuses.
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How to efficiently build a tree from a flat structure?
I have a bunch of objects in a flat structure. These objects have an ID and a ParentID property so they can be arranged in trees. They are in no particular order.
Each ParentID property does not necessarily matches with an ID in the structure. Therefore their could be several trees emerging ...
一体化的Linux系统性能和使用活动监控工具–Sysstat - 更多技术 - 清泛网 -...
...和sar协作，用于总结每日报告。
Sadf：以不同的格式（CSV或XML）显示sar生成的数据。
Sysstat：解释sysstat的各种作用。
nfsiostat-sysstat:统计NFS协议的网络文件系统的 I/O状态数据。
cifsiostat：统计CIFS协议的网络文件系统的 I/O状态数...
How does Bluebird's util.toFastProperties function make an object's properties “fast”?
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Is having an 'OR' in an INNER JOIN condition a bad idea?
In trying to improve the speed of an immensely slow query (several minutes on two tables with only ~50,000 rows each, on SQL Server 2008 if it matters), I narrowed down the problem to an OR in my inner join, as in:
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PHP Regex to get youtube video ID?
...how me how to get the youtube id out of a url regardless of what other GET variables are in the URL.
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Permission denied on accessing host directory in Docker
...ectory in Docker, but then I can not access it from within the container, even if the access permissions look good.
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How can I efficiently select a Standard Library container in C++11?
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How can I dynamically create derived classes from a base class
For example I have a base class as follows:
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