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python pandas: apply a function with arguments to a series
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Default function arguments in Rust
... in the future.
So I wrote a proc_macro duang to implement it in the macro form.
For example:
duang! ( fn add(a: i32 = 1, b: i32 = 2) -> i32 { a + b } );
fn main() {
assert_eq!(add!(b=3, a=4), 7);
assert_eq!(add!(6), 8);
assert_eq!(add(4,5), 9);
}
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Principal component analysis in Python
...methods use the current value.
Methods:
The methods of class PCA transform vectors or arrays of e.g.
20 variables, 2 principal components and 1000 observations,
using partial matrices U' d' Vt', parts of the full U d Vt:
A ~ U' . d' . Vt' where e.g.
U' is 1000 x 2
d'...
How to handle AccessViolationException
...Exception and see if that lets you catch it.
**EDIT*
Here is some more information that might be useful (it's a long read).
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How do I fix the Visual Studio compile error, “mismatch between processor architecture”?
...|Configuration Manager menu item.
Find your project in the list, under Platform it will say "Any CPU"
Select the "Any CPU" option from the drop down and then select <New..>
From that dialog, select x86 from the "New Platform" drop down and make sure "Any CPU" is selected in the "Copy settings ...
What's the use of Jade or Handlebars when writing AngularJs apps
...remembering that premature optimisation is generally a Bad Thing. Where performance is truly at issue, and you have the server capacity to spare to handle this, server side templating can assist. This applies to products like Twitter and Basecamp, where the cost of doing a lot of server side work is...
What does “Document-oriented” vs. Key-Value mean when talking about MongoDB vs Cassandra?
... database extends the previous model and values are stored in a structured format (a document, hence the name) that the database can understand. For example, a document could be a blog post and the comments and the tags stored in a denormalized way. Since the data are transparent, the store can do m...
Android: What's the difference between Activity.runOnUiThread and View.post?
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Is the 'override' keyword just a check for a overridden virtual method?
...f different, but related type. Read about covariant and contravariant transformations if interested.
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What is the X-REQUEST-ID http header?
... is generated (randomly) by the client it does not contain any sensitive information, and should thus not violate the user's privacy. As a unique ID is created per request it does also not help with tracking users.
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