大约有 43,400 项符合查询结果（耗时：0.0312秒） [XML]
Count number of occurences for each unique value
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182
Perhaps table is what you are after?
dummyData = rep(c(1,2, 2, 2), 25)
table(dummyData)
# dumm...
The difference between bracket [ ] and double bracket [[ ]] for accessing the elements of a list or
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12 Answers
12
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Understanding the map function
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myildirim
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answered Jun 11 '12 at 1:51
davedave
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print call stack in C or C++
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answered Oct 10 '10 at 10:25
Idan KIdan K
19k88 gold badges5858 silver badges8181 bronze badges
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Find which version of package is installed with pip
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As of pip 1.3, there is a pip show command.
$ pip show Jinja2
---
Name: Jinja2
Version: 2.7.3
Location: /path/to/virtualenv/lib/python2.7/site-packages
Requires: markupsafe
In older versions, pip freeze and grep should do the job nicely.
$ pip freeze | grep Jinja2
Jinja2==2.7.3
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How to track untracked content?
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241
You have added vendor/plugins/open_flash_chart_2 as “gitlink” entry, but never defined it ...
php中json_decode()和json_encode()的使用方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...code()和json_encode()的使用方法1.json_decode()json_decode(PHP 5 >= 5.2.0, PECL json >= 1.2.0)json_decode — 对 JSON 格式的字符串进行编码说明mixed jso...1.json_decode()
(PHP 5 >= 5.2.0, PECL json >= 1.2.0)
对 JSON 格式的字符串进行编码
说明：
mixed json_decod...
oracle10g 网址收藏 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...迅雷进行下载，就不用登陆OTN了：Oracle Database 10g Release 2 (10.2.0.1....载OTN上的这些软件，你需要一个OTN免费帐号，不过如果通过迅雷进行下载，就不用登陆OTN了：
Oracle Database 10g Release 2 (10.2.0.1.0) Enterprise/Standard Edition for Microsoft Wi...
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How to assert two list contain the same elements in Python? [duplicate]
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As of Python 3.2 unittest.TestCase.assertItemsEqual(doc) has been replaced by unittest.TestCase.assertCountEqual(doc) which does exactly what you are looking for, as you can read from the python standard library documentation. The method is...