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Why can't R's ifelse statements return vectors?
...urns a value with the same
shape as test which is filled with
elements selected from either yes or
no depending on whether the element
of test is TRUE or FALSE.
Since you are passing test values of length 1, you are getting results of length 1. If you pass longer test vectors, you will get...
argparse: identify which subparser was used [duplicate]
...l "only contain attributes for the main parser and the sub parser that was selected". Unfortunately this may not be enough information to determine which sub parser was used. The documentation recommends using the set_defaults(...) method on the sub parser to solve this problem.
For example, I've a...
Get element type with jQuery
...e type of an element with jQuery? For example, is the element a div, span, select, or input?
7 Answers
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How to use XPath in Python?
...thFreeContext(). This is not very Pythonic.
If you are doing simple path selection, stick with ElementTree ( which is included in Python 2.5 ). If you need full spec compliance or raw speed and can cope with the distribution of native code, go with libxml2.
Sample of libxml2 XPath Use
import l...
MongoDb query condition on comparing 2 fields
...have a collection T , with 2 fields: Grade1 and Grade2 , and I want to select those with condition Grade1 > Grade2 , how can I get a query like in MySQL?
...
How do I read and parse an XML file in C#?
...then find a node below it ie like this
XmlNode node = doc.DocumentElement.SelectSingleNode("/book/title");
or
foreach(XmlNode node in doc.DocumentElement.ChildNodes){
string text = node.InnerText; //or loop through its children as well
}
then read the text inside that node like this
string...
AWS S3 copy files and folders between two buckets
...
You can now do it from the S3 admin interface. Just go into one bucket select all your folders actions->copy. Then move into your new bucket actions->paste.
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How to combine multiple conditions to subset a data-frame using “OR”?
...
filter(df, v1 < 0.5 | v2 == "g")
Using sqldf:
library(sqldf)
sqldf('SELECT *
FROM df
WHERE v1 < 0.5 OR v2 = "g"')
Output for the above options:
v1 v2
1 0.26550866 a
2 0.37212390 b
3 0.20168193 e
4 0.94467527 g
5 0.06178627 j
...
How to update maven repository in Eclipse?
...ou can right-click on your project then Maven > Update Project..., then select Force Update of Snapshots/Releases checkbox then click OK.
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Include only certain file types when searching in Visual Studio
...ite helpful.
Notice how I use *.cs* instead of *.c* since the latter would select jquery custom files such as jquery.custom1234.js (which I usually use in most of my projects), of course if you don't you could just use *.c*.
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