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What are some uses of decltype(auto)?
...(auto).
template<int i>
struct Int {};
constexpr auto iter(Int<0>) -> Int<0>;
template<int i>
constexpr auto iter(Int<i>) -> decltype(auto)
{ return iter(Int<i-1>{}); }
int main() { decltype(iter(Int<10>{})) a; }
decltype(auto) is used here to ...
Swift - How to convert String to Double
...e: The NSString doubleValue property is not recommended because it returns 0 if the value cannot be converted (i.e.: bad user input).
let lessPrecisePI = Float("3.14")
let morePrecisePI = Double("3.1415926536")
let invalidNumber = Float("alphabet") // nil, not a valid number
Unwrap the values to...
HTML5 record audio to file
...
107
There is a fairly complete recording demo available at: http://webaudiodemos.appspot.com/Audio...
Get generated id after insert
...
DroidDev
1,53044 gold badges1919 silver badges3939 bronze badges
answered Mar 23 '11 at 18:20
GrAndGrAnd
...
Adding a legend to PyPlot in Matplotlib in the simplest manner possible
...ll legend(loc='upper left').
Consider this sample (tested with Python 3.8.0):
import numpy as np
import matplotlib.pyplot as plt
x = np.linspace(0, 20, 1000)
y1 = np.sin(x)
y2 = np.cos(x)
plt.plot(x, y1, "-b", label="sine")
plt.plot(x, y2, "-r", label="cosine")
plt.legend(loc="upper left")
plt.y...
Open file dialog box in JavaScript
...styles are applied to get that feel. Opacity of the file control is set to 0 so that it appears that the dialog window is opened when clicking on the div.
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How to generate a random int in C?
...lled once.
int r = rand(); // Returns a pseudo-random integer between 0 and RAND_MAX.
Edit: On Linux, you might prefer to use random and srandom.
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Using C# reflection to call a constructor
...ic Addition(int a)
{
Console.WriteLine("Constructor called, a={0}", a);
}
}
class Test
{
static void Main()
{
Type type = typeof(Addition);
ConstructorInfo ctor = type.GetConstructor(new[] { typeof(int) });
object instance = ctor.Invoke(new object[] {...
javascript remove “disabled” attribute from html input
...
201
Set the element's disabled property to false:
document.getElementById('my-input-id').disabled ...
HtmlString vs. MvcHtmlString
...
answered Aug 1 '10 at 17:02
RupRup
30.4k77 gold badges7878 silver badges9898 bronze badges
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