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How to subtract a day from a date?
I have a Python datetime.datetime object. What is the best way to subtract one day?
6 Answers
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How to get past the login page with Wget?
...
If you need it for one time use, you can log in via browser and copy needed headers afterwards:
Use "Copy as cURL" in the Network tab of Developer Tools (reload the page after opening) and replace curl's header flag -H and --data with wget's --he...
Can I use jQuery with Node.js?
... $.on('ready', function () {
// do some stuff to the dom in real-time
$('body').append('Hello World');
$('body').append('<input type="text" />');
$('input').live('click', function () {
console.log('input clicked');
// ...
});
...
For each row return the column name of the largest value
...ast"]), rowid, mult="first"]
Benchmarking:
# data.table solution
system.time({
DT <- data.table(value=unlist(DF, use.names=FALSE),
colid = 1:nrow(DF), rowid = rep(names(DF), each=nrow(DF)))
setkey(DT, colid, value)
t1 <- DT[J(unique(colid), DT[J(unique(colid)), value, mult="las...
Can we instantiate an abstract class?
...us direct subclass of the class named by T is declared. It is a compile-time error if the
class denoted by T is a final class.
If T denotes an interface, then an anonymous direct subclass of Object that implements the interface named by T is declared.
In either case, the body of the s...
Java's Virtual Machine and CLR
...a Virtual Machine works versus how the .NET Framework Common Language Runtime (CLR) works?
5 Answers
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What are the primary differences between Haskell and F#? [closed]
...d.
While Haskell is an amazing language, the major benefit of F# (for the time being), is that it sits on top of the CLR. This lends it self to polyglot programming. One day, you may write your web UI in ASP.net MVC, your business logic in C#, your core algorithms in F# and your unit tests in Ironr...
How can I strip the whitespace from Pandas DataFrame headers?
...me
Columns: [ year, month , day, asdas , asdas, as , sa, asdas ]
%timeit df.rename(columns=lambda x: x.strip())
%timeit df.columns.str.strip()
1000 loops, best of 3: 293 µs per loop
10000 loops, best of 3: 143 µs per loop
So str.strip is ~2X faster, I expect this to scale better for lar...
How to select date from datetime column?
I have a column of type "datetime" with values like 2009-10-20 10:00:00
8 Answers
8
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Flat file databases [closed]
...e (they can, in fact, put arbitrary code in your "database" to be run each time.)
Personally, I'd say - why not look to the future? There have been so many times that I've had issues because I've been creating my own "proprietary" files, and the project has exploded to a point where it needs a datab...