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Distinct() with lambda?
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Konrad Viltersten
25.6k4343 gold badges176176 silver badges324324 bronze badges
answered Nov 11 '10 at 19:19
Carlo BosCarlo B...
TLSF源码及算法介绍 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
.... It now runs on x86_64 and solaris64.
* - I also tested this on vxworks/32and solaris/32 and i386/32 processors.
* - Remove assembly code. I could not measure any performance difference
* on my core2 processor. This also makes the code more portable.
* - Moved defines/typedefs from tlsf....
GroupBy pandas DataFrame and select most common value
...ata frame with three string columns. I know that the only one value in the 3rd column is valid for every combination of the first two. To clean the data I have to group by data frame by first two columns and select most common value of the third column for each combination.
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搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...赶紧操作部署一下！
官方推荐的副本集机器数量为至少3个，那我们也按照这个数量配置测试。
1、准备两台机器 192.168.1.136、192.168.1.137、192.168.1.138。 192.168.1.136 当作副本集主节点，192.168.1.137、192.168.1.138作为副本集副本节点。...
What is LINQ and what does it do? [closed]
...t's start this exploration with the parts belonging to the .NET Framework (3.5).
LINQ To Objects - examine System.Linq.Enumerable for query methods. These target IEnumerable<T>, allowing any typed loopable collection to be queried in a type-safe manner. These queries rely on compiled .NET me...
How do I get bit-by-bit data from an integer value in C?
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Ashish Ahuja
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answered Feb 12 '10 at 4:54
forefingerforefinger
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Accessing an SQLite Database in Swift
...QLite C calls. If using Xcode 9 or later, you can simply do:
import SQLite3
Create/open database.
let fileURL = try! FileManager.default
.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
.appendingPathComponent("test.sqlite")
// open database...
Get the cartesian product of a series of lists?
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13 Answers
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How to check if a string is a valid hex color representation?
... -> match end
i -> ignore case
If you need support for 3-character HEX codes, use the following:
/^#([0-9A-F]{3}){1,2}$/i.test('#ABC')
The only difference here is that
[0-9A-F]{6}
is replaced with
([0-9A-F]{3}){1,2}
This means that instead of matching exactly 6 charact...
Cross-thread operation not valid: Control 'textBox1' accessed from a thread other than the thread it
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The data received in your serialPort1_DataReceived method is coming from another thread contex...