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Collection was modified; enumeration operation may not execute
...the hood during the loop and leading to that message. You can verify this by changing
foreach(Subscriber s in subscribers.Values)
To
foreach(Subscriber s in subscribers.Values.ToList())
If I'm right, the problem will disappear.
Calling subscribers.Values.ToList() copies the values of subscribers....
Setting different color for each series in scatter plot on matplotlib
...
I don't know what you mean by 'manually'. You can choose a colourmap and make a colour array easily enough:
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.cm as cm
x = np.arange(10)
ys = [i+x+(i*x)**2 for i in range(10)]
colors = cm.ra...
std::shared_ptr thread safety explained
...ly regarding your original 3 questions.
But the ending part of your edit
Calling reset() in thread IV will delete previous instance of A class created in first thread and replace it with new instance? Moreover after calling reset() in IV thread other threads will see only newly created object?
is ...
What is the Ruby (spaceship) operator?
...es not work as expected. The factors should be powers of two in descending order, i.e. 8, -4, 2, 1. The way you wrote it (with factors 4,-3,2,1), e.g. "age + lastname" counts more than "zip"...
– Elmar Zander
Sep 23 '19 at 5:51
...
Ruby Hash to array of values
...
Are the keys printed in the exact order which they occur ?
– stack1
Jun 24 '15 at 22:18
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Does R have an assert statement as in python?
...ALSE){
warning("error message to print")
}
These are both provided by base R and require no packages to run or include in writing your own functions. I prefer this approach to write code with fewer dependancies and this syntax is widely used in package development. However, similar functiona...
Is it correct to use JavaScript Array.sort() method for shuffling?
...om() will stop behaving well if the number of atomic events is of the same order of magnitude.
When using Fisher-Yates, the relevant parameter is the size of the array, which should never approach 2^52 due to practical limitations.
When sorting with a random comparision function, the function basi...
JSR-303 @Valid annotation not working for list of child objects
... level. I think the @GroupSequence could be used to specify the validation order.
– Ritesh
Jan 3 '17 at 16:28
My detai...
Binding a Button's visibility to a bool value in ViewModel
...converter:
<ValueConversion(GetType(Boolean), GetType(Visibility))> _
Public Class BoolToVisibilityConverter
Implements IValueConverter
Public Function Convert(ByVal value As Object, ByVal targetType As System.Type, ByVal parameter As Object, ByVal culture As System.Globalization.Cul...
Difference between setUp() and setUpBeforeClass()
...during a test run.
So let's assume you had three tests in your class, the order of method calls would be:
setUpBeforeClass()
(Test class first instance constructed and the following methods called on it)
setUp()
test1()
tearDown()
(Test class second instance constructed and the f...