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Checking if a double (or float) is NaN in C++
Is there an isnan() function?
21 Answers
21
...
Is it possible to dynamically compile and execute C# code fragments?
...ce short example take from LukeH's blog, which uses some LINQ too just for fun.
using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.CSharp;
using System.CodeDom.Compiler;
class Program
{
static void Main(string[] args)
{
var csc = new CSharpCodeProvid...
How do short URLs services work?
... How do they handle url parameters? For example www.digg.com?filter=123
– Ronen
Aug 12 '18 at 7:44
...
How to parse freeform street/postal address out of text, and into components
...esses, training with data from OpenStreetMap, OpenAddresses and OpenCage.
https://github.com/openvenues/libpostal
(more info about it)
Other tools/services:
http://www.gisgraphy.com
Free, open source, and ready to use geocoder and geolocalisation webservices, integrating OpenStreetMap, GeoNames ...
Why can't (or doesn't) the compiler optimize a predictable addition loop into a multiplication?
...lways point to MyArray any time that instruction executed, but it didn't. Fun.
– supercat
Apr 3 '13 at 16:51
then why...
.gitignore and “The following untracked working tree files would be overwritten by checkout”
... I thought it would only remove it from git.
– tyegah123
Sep 29 '14 at 8:37
25
The -x option hurt...
filter for complete cases in data.frame using dplyr (case-wise deletion)
... passing it to the filter.
Another benchmark with more columns:
set.seed(123)
x <- sample(1e5,1e5*26, replace = TRUE)
x[sample(seq_along(x), 1e3)] <- NA
df <- as.data.frame(matrix(x, ncol = 26))
library(microbenchmark)
microbenchmark(
na.omit = {df %>% na.omit},
filter.anonymous = ...
This Handler class should be static or leaks might occur: IncomingHandler
...lass implements MessageHandler {
private static final int DO_IT_MSG = 123;
private MainThreadHandler<MyClass> mHandler = new MainThreadHandler<>(this);
private void start() {
// Do it in 5 seconds.
mHandler.sendEmptyMessageDelayed(DO_IT_MSG, 5 * 1000);
...
Why does Google +1 record my mouse movements? [closed]
...
123
+500
It app...
How do I convert a pandas Series or index to a Numpy array? [duplicate]
...stead, use to_numpy(copy=True);
v = df.index.to_numpy(copy=True)
v[-1] = -123
df
A B
a 1 2
b 4 5
Note that this function also works for DataFrames (while .array does not).
array Attribute
This attribute returns an ExtensionArray object that backs the Index/Series.
pd.__version__
# ...