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How to use JUnit to test asynchronous processes
... run synchronously.
So suppose I'm trying to test the asynchronous method Foo#doAsync(Callback c),
class Foo {
private final Executor executor;
public Foo(Executor executor) {
this.executor = executor;
}
public void doAsync(Callback c) {
executor.execute(new Runnable() {
@O...
Lua简明教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的两个函数是一样的：
1
2
function foo(x) return x^2 end
foo = function(x) return x^2 end
Table
所谓Table其实就是一个Key Value的数据结构，它很像Javascript中的Object，或是PHP中的数组，在别的语言里叫Dict或Map...
How to empty a list?
...
This actually removes the contents from the list, but doesn't replace the old label with a new empty list:
del lst[:]
Here's an example:
lst1 = [1, 2, 3]
lst2 = lst1
del lst1[:]
print(lst2)
For the sake of completeness, the slic...
When do you use the “this” keyword? [closed]
...declare extension methods
To pass parameters between constructors
To internally reassign value type (struct) value.
To invoke an extension method on the current instance
To cast itself to another type
To chain constructors defined in the same class
You can avoid the first usage by not having membe...
Executing JavaScript without a browser?
...n on the topic, but if you want direct links, here they are:
You can install Rhino as others have pointed out. This post shows an easy way to get it up and running and how to alias a command to invoke it easily
If you're on a Mac, you can use JavaScriptCore, which invokes WebKit's JavaScript engin...
How to read environment variables in Scala
...
I would also prefer Properties. It allows to retrieve Optionals, and has names for commonly used properties.
– ppopoff
Dec 17 '15 at 14:46
...
Save plot to image file instead of displaying it using Matplotlib
...fied by the extension:
from matplotlib import pyplot as plt
plt.savefig('foo.png')
plt.savefig('foo.pdf')
Will give a rasterized or vectorized output respectively, both which could be useful. In addition, you'll find that pylab leaves a generous, often undesirable, whitespace around the image. R...
Java: convert List to a String
...
StringJoiner is especially useful if one wants to join to something like [a, b, c] including the braces.
– koppor
Feb 17 '16 at 6:26
...
How to HTML encode/escape a string? Is there a built-in?
...ethods to encode and decode HTML as well as URLs.
CGI::escapeHTML('Usage: foo "bar" <baz>')
# => "Usage: foo &quot;bar&quot; &lt;baz&gt;"
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...
How do I mock an open used in a with statement (using the Mock framework in Python)?
... with patch('{}.open'.format(__name__), m, create=True):
... with open('foo', 'w') as h:
... h.write('some stuff')
>>> m.assert_called_once_with('foo', 'w')
>>> handle = m()
>>> handle.write.assert_called_once_with('some stuff')
...