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Are HLists nothing more than a convoluted way of writing tuples?
... l1 = f1.toList // Inferred type is List[Int]
val t2 = (23, ((true, 2.0, "foo"), "bar"), (13, false))
val f2 = flatten(t2)
val t2b = f2.tupled
// Inferred type of t2b is (Int, Boolean, Double, String, String, Int, Boolean)
Without using HLists (or something equivalent) to abstract over the ...
How to join int[] to a character separated string in .NET?
...
Although the OP specified .NET 3.5, people wanting to do this in .NET 2.0 with C#2 can do this:
string.Join(",", Array.ConvertAll<int, String>(ints, Convert.ToString));
I find there are a number of other cases where the use of the Convert.xxx functions is a neater alternative to a lamb...
Compare double to zero using epsilon
..._limits<double>::epsilon();
values.half_epsilon = values.epsilon / 2.0;
}
Using a debugger, stop the program at the end of main and look at the results and you'll see that epsilon / 2 is distinct from epsilon, zero and one.
So this function takes values between +/- epsilon and makes them ...
What is the best way to clone/deep copy a .NET generic Dictionary?
...
Okay, the .NET 2.0 answers:
If you don't need to clone the values, you can use the constructor overload to Dictionary which takes an existing IDictionary. (You can specify the comparer as the existing dictionary's comparer, too.)
If you d...
How to exclude property from Json Serialization
...em.Text.Json NuGet
package. The package supports:
.NET Standard 2.0 and later versions
.NET Framework 4.6.1 and later versions
.NET Core 2.0, 2.1, and 2.2
How do I create my own URL protocol? (e.g. so://…) [closed]
...
This is from .Net 2.0 runtime (note, this included 3.0 and 3.5) timeframe. It didn't support different CLR runtimes in the same process, so if I wrote a 1.0 handler and you wrote a 2.0 one, and both of our products were installed on a customer...
Django Passing Custom Form Parameters to Formset
...
Official Document Way
Django 2.0:
ArticleFormSet = formset_factory(MyArticleForm)
formset = ArticleFormSet(form_kwargs={'user': request.user})
https://docs.djangoproject.com/en/2.0/topics/forms/formsets/#passing-custom-parameters-to-formset-forms
...
Javascript fuzzy search that makes sense
... hit_count++
if hit_count > 0
return ((2.0 * hit_count) / union)
return 0.0
Pass two strings to string_similarity which will return a number between 0 and 1.0 depending on how similar they are. This example uses Lo-Dash
Usage Example....
query = 'jenny Jac...
How often should you use git-gc?
...
You can do it without any interruption, with the new (Git 2.0 Q2 2014) setting gc.autodetach.
See commit 4c4ac4d and commit 9f673f9 (Nguyễn Thái Ngọc Duy, aka pclouds):
gc --auto takes time and can block the user temporarily (but not any less annoyingly).
Make it run in ...
How to stop /#/ in browser with react-router?
...ory()} >
...
</Router>
), document.body);
Source: Version 2.0 Upgrade Guide
Version 4
For the upcoming version 4 of react-router, the syntax has changed a great deal and it is required is to use BrowserRouter as the router root tag.
import BrowserRouter from 'react-router/Browser...