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Default argument values in JavaScript functions [duplicate]
...ined') a = 10;
if (typeof(b)==='undefined') b = 20;
//your code
}
and then you can call it like func(); to use default parameters.
Here's a test:
function func(a, b){
if (typeof(a)==='undefined') a = 10;
if (typeof(b)==='undefined') b = 20;
alert("A: "+a+"\nB: "+b);
}
//testing
...
Adding a legend to PyPlot in Matplotlib in the simplest manner possible
...
Add a label= to each of your plot() calls, and then call 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", ...
RootViewController Switch Transition Animation
...his approach, it worked partially, the thing is my app shall only stay in landscape mode, but by doing rootviewcontroller transition, the newly-presented view controller is loaded in portrait at the beginning, and quickly rotate to landscape mode, how to solve that?
– Chris Che...
Is the C# static constructor thread safe?
.... https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-and-structs/static-constructors
The implementation shown is thread safe for the initial construction, that is, no locking or null testing is required for constructing the Singleton object. However, this does not mean that an...
Overriding == operator. How to compare to null? [duplicate]
...
I've always done it this way (for the == and != operators) and I reuse this code for every object I create:
public static bool operator ==(Person lhs, Person rhs)
{
// If left hand side is null...
if (System.Object.ReferenceEquals(lhs, null))
{
...
Is this object-lifetime-extending-closure a C# compiler bug?
...ttention. I'll look into it. It is possible that it has already been found and fixed.
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Change Volley timeout duration
I use the new Volley framework for Android to do a request to my server. But it timeouts before getting the response, although it does respond.
...
Is there a decorator to simply cache function return values?
... @Jonathan It works, but wrongly. If I pass a hashable, mutable argument, and change the value of the object after the first call of the function, the second call will return the changed, not the original, object. That is almost certainly not what the user wants. For it to work for mutable argume...
PHP script to loop through all of the files in a directory?
...of files, such as the script itself or other "system" files. (Like the . and .. "directories".)
8 Answers
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How to retrieve absolute path given relative
Is there a command to retrieve the absolute path given the relative path?
21 Answers
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