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Call apply-like function on each row of dataframe with multiple arguments from each row
... Don't use apply on big data.frames it will copy the entire object (to convert to a matrix). This will also cause problems If you have different class objects within the data.frame.
– mnel
Feb 25 '13 at 2:47
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Infinite Recursion with Jackson JSON and Hibernate JPA issue
When trying to convert a JPA object that has a bi-directional association into JSON, I keep getting
25 Answers
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Any gotchas using unicode_literals in Python 2.6?
... both, python tries to decode the encoded string (assuming it's ascii) and convert it to unicode and fails. It would work if you did print name + two.name.decode('utf-8').
The same thing can happen if you encode a string and try to mix them later.
For example, this works:
# encoding: utf-8
html = ...
What's the Best Way to Shuffle an NSMutableArray?
If you have an NSMutableArray , how do you shuffle the elements randomly?
12 Answers
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Importing a Maven project into Eclipse from Git
...ion to these issues:
You can't install m2e-egit (I get an error in Juno)
Converting a general project (connected to your Git repository) to a Maven project isn't working for you (The Import Maven Projects step seems essential)
Importing Maven Projects from your repository on the filesystem isn't s...
How do you parse and process HTML/XML in PHP?
...he SimpleXML extension provides a very simple and easily usable toolset to convert XML to an object that can be processed with normal property selectors and array iterators.
SimpleXML is an option when you know the HTML is valid XHTML. If you need to parse broken HTML, don't even consider SimpleX...
Static Initialization Blocks
...the constructor's job to initialize fields.
– Martin Andersson
Apr 1 '13 at 18:56
2
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Android, getting resource ID from string?
...ne of my classes. It needs to use both the id that the reference points to and also it needs the string. How should I best achieve this?
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fatal error LNK1112: module machine type 'x64' conflicts with target machine type 'X86'
...ed the same problem in VS2008 when I tried to add a X64 build to a project converted from VS2003.
I looked at everything found when searching for this error on Google (Target machine, VC++Directories, DUMPBIN....) and everything looked OK.
Finally I created a new test project and did the same chan...
How to use a variable to specify column name in ggplot
...t will remain around for a long time).
The idiomatic way now would be to convert to a symbol the string that the variable contains, using sym()(which is almost the same as base aliases as.name() / as.symbol()), and unquote it using !!
Simulating OP's data we can do :
library(tidyverse)
rates.by....