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How does one reorder columns in a data frame?
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354
Your dataframe has four columns like so df[,c(1,2,3,4)].
Note the first comma means keep all the...
Unicode与UTF-8互转(C语言实现) - C/C++ - 清泛网 - 专注C/C++及内核技术
...符号的编码都
不一样, 比如, U+0639表示阿拉伯字母Ain, U+0041表示英语的大写字母A, U+4E25表示汉
字"严". 具体的符号对应表, 可以查询unicode.org, 或者专门的汉字对应表.
2.2 Unicode的问题
需要注意的是, "Unicode只是一个符号集, 它...
Installing specific package versions with pip
...is here: http://pypi.python.org/pypi/MySQL-python/1.2.2
The download link 404s and the fallback URL links are re-directing infinitely due to sourceforge.net's recent upgrade and PyPI's stale URL.
So to properly install the driver, you can follow these steps:
pip uninstall MySQL_python
pip install...
Using Python String Formatting with Lists
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114
print s % tuple(x)
instead of
print s % (x)
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Reducing the space between sections of the UITableView
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264
It was a bit tricky, but try this code:
- (CGFloat)tableView:(UITableView*)tableView
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PHP & mySQL: Year 2038 Bug: What is it? How to solve it?
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Why does it occur and what happens when it occurs?
Times beyond 03:14:07 UTC on Tuesday, 19 January 2038 will 'wrap around' and be stored internally as a negative number, which these systems will interpret as a time in December 13, 1901 rather than in 2038. This is due to the fact that the n...
laravel throwing MethodNotAllowedHttpException
...get something very basic running. I am used to CI and now learning Laravel 4, and their docs are not making it easy! Anyways, I am trying to create a login form and just make sure that data is posted successfully by printing it in the next form. I am getting this exception:
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Concurrent vs serial queues in GCD
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answered Oct 4 '13 at 11:12
Stephen DarlingtonStephen Darlington
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How can I apply a function to every row/column of a matrix in MATLAB?
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gnovicegnovice
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lodash multi-column sortBy descending
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341
As of lodash 3.5.0 you can use sortByOrder (renamed orderBy in v4.3.0):
var data = _.sortByOrd...