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What is “callback hell” and how and why does RX solve it?
...ions we get here on StackOverflow asking how to do this kind of thing is a testament to how confusing it is :)
3) Why does it occur ?
It occurs because in JavaScript the only way to delay a computation so that it runs after the asynchronous call returns is to put the delayed code inside a callback...
Is returning null bad design? [closed]
...ould potentially return null.
// Two possible code paths now so harder to test.
if (c != null) {
for (Item item : c) {
// Process item.
}
}
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What is the use of “ref” for reference-type variables in C#?
...wap<T>(ref T x, ref T y) {
T t = x;
x = y;
y = t;
}
var test = new[] { "0", "1" };
Swap(ref test[0], ref test[1]);
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How many characters can a Java String have?
... size? Also, I don't know which java virtual machine the judge is using to test my problem is Integer.MAX_VALUE part of the spec of JVM dependant?
– andandandand
Jul 24 '09 at 20:40
...
Where in a virtualenv does the custom code go?
... you have multiple applications using the same virtualenv. Or, you may be testing an application with a virtualenv that will later be deployed with a system Python. Or, you may be packaging up a standalone app where it might make sense to have the virtualenv directory located somewhere within the ...
How to get the name of enumeration value in Swift?
...
In Swift-3 (tested with Xcode 8.1) you can add the following methods in your enum:
/**
* The name of the enumeration (as written in case).
*/
var name: String {
get { return String(describing: self) }
}
/**
* The full name of th...
How do I detect if Python is running as a 64-bit application? [duplicate]
...ample below demonstrates. The quickest safe multi-platform approach is to test sys.maxsize on Python 2.6, 2.7, Python 3.x.
$ arch -i386 /usr/local/bin/python2.7
Python 2.7.9 (v2.7.9:648dcafa7e5f, Dec 10 2014, 10:10:46)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright",...
Pycharm does not show plot
...
I test in my version of Pycharm (Community Edition 2017.2.2), you may need to announce both plt.interactive(False) and plt.show(block=True) as following:
import numpy as np
import matplotlib.pyplot as plt
x = np.linspace(0, 6...
Creating runnable JAR with Gradle
...nding to 4 different classpaths: compile (used to compile the Java files), testCompile (which is used to compile the test Java source files), runtime (which is used to execute the application) and testRuntime (which is used to execute the tests). See gradle.org/docs/current/userguide/…
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Clone Object without reference javascript [duplicate]
...rray so for..in is a better choice in this case. Also, there is no need to test source[prop], why not copy falsey properties?
– RobG
Oct 2 '12 at 12:25
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