大约有 22,536 项符合查询结果（耗时：0.0317秒） [XML]
Filter rows which contain a certain string
...verse)
# The data. Data expo 09. ASA Statistics Computing and Graphics
# http://stat-computing.org/dataexpo/2009/the-data.html
df <- read_csv("Downloads/2008.csv")
print(dim(df))
# [1] 7009728 29
benchmark(
"str_detect" = {df %>% filter(str_detect(Dest, 'MCO|BWI'))},
"grepl" = {df ...
Creating a singleton in Python
...ion of a class means and how to implement that definition. See for example http://code.activestate.com/recipes/498149/, which essentially recreates C-style structs in Python using metaclasses. The thread What are some (concrete) use-cases for metaclasses? also provides some examples, they generally ...
Swift 和 .Net 开源，回顾 2015 年 9 大开源事件 - 开源 & Github - 清泛网 - 专注IT技能提升
...“调整”的软件，以规避安全和排放法规。
原文链接：http://www.cio.com/article/3017996/open-source-tools/9-biggest-open-source-stories-of-2015.html
How can I add (simple) tracing in C#? [closed]
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DotNetCoders has a starter article on it: http://www.dotnetcoders.com/web/Articles/ShowArticle.aspx?article=50. They talk about how to set up the switches in the configuration file and how to write the code, but it is pretty old (2002).
There's another article on Cod...
How to find out if a file exists in C# / .NET?
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Use:
File.Exists(path)
MSDN: http://msdn.microsoft.com/en-us/library/system.io.file.exists.aspx
Edit: In System.IO
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What's your favorite “programmer” cartoon?
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I like this one: http://xkcd.com/149/
(Proper User Policy apparently means Simon Says.)
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edited Feb 8 '17 at ...
Subdomain on different host [closed]
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Will this send a redirect http Message to The client?
– Koray Tugay
Mar 16 '14 at 19:12
2
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Scroll to bottom of div?
...l");
mydiv.scrollTop(mydiv.prop("scrollHeight"));
Works from jQuery 1.6
https://api.jquery.com/scrollTop/
http://api.jquery.com/prop/
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Select which href ends with some string
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$('a[href$="ABC"]')...
Selector documentation can be found at http://docs.jquery.com/Selectors
For attributes:
= is exactly equal
!= is not equal
^= is starts with
$= is ends with
*= is contains
~= is contains word
|= is starts with prefix (i.e., |= "prefix" matches "prefix-...")
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Public free web services for testing soap client [closed]
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There is a bunch on here:
http://www.webservicex.net/WS/wscatlist.aspx
Just google for "Free WebService" or "Open WebService" and you'll find tons of open SOAP endpoints.
Remember, you can get a WSDL from any ASMX endpoint by adding ?WSDL to the url...