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What are the benefits of Java's types erasure?
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edited Jun 20 at 9:12
Community♦
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answered Feb 18 '14 at 3:51
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Why doesn't TFS get latest get the latest?
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120
TFS redefined what "Get Latest" does. In TFS terms, Get Latest means get the latest version of ...
What is the difference between a thread and a fiber?
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answered Apr 28 '09 at 4:40
Jason CocoJason Coco
75.8k2020 gold badges179179 silver badges178178 bronze badges
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Git vs Team Foundation Server [closed]
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answered Dec 11 '10 at 12:24
eckeseckes
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C++并发编程（中文版） - 文档下载 - 清泛网 - 专注C/C++及内核技术
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1.1 什么是并发… 1
1.1.1 计算机系统的并发… 1
1.1.2 并发的方法… 3
1.2 为什么使用并发… 4
1.2.1 因划分重点而使用并发… 5
1.2.2 为了提高性能而使用并发… 5
1.2.3 什么时候不使用并发… 6
1.3 在C++中使用并发和多线程… ...
Comparing two dictionaries and checking how many (key, value) pairs are equal
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26 Answers
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How to select the row with the maximum value in each group
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Here's a data.table solution:
require(data.table) ## 1.9.2
group <- as.data.table(group)
If you want to keep all the entries corresponding to max values of pt within each group:
group[group[, .I[pt == max(pt)], by=Subject]$V1]
# Subject pt Event
# 1: 1 5 2
# 2: ...
Mean per group in a data.frame [duplicate]
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257
This type of operation is exactly what aggregate was designed for:
d <- read.table(text=
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Understanding dict.copy() - shallow or deep?
...pied by value, but just creating a new reference.
>>> a = {1: [1,2,3]}
>>> b = a.copy()
>>> a, b
({1: [1, 2, 3]}, {1: [1, 2, 3]})
>>> a[1].append(4)
>>> a, b
({1: [1, 2, 3, 4]}, {1: [1, 2, 3, 4]})
In contrast, a deep copy will copy all contents by valu...