大约有 6,261 项符合查询结果（耗时：0.0200秒） [XML]
Is there a zip-like function that pads to longest length in Python?
...ue parameter:
>>> list(itertools.zip_longest(a, b, c, fillvalue='foo'))
[('a1', 'b1', 'c1'), ('foo', 'b2', 'c2'), ('foo', 'b3', 'foo')]
With Python 2 you can either use itertools.izip_longest (Python 2.6+), or you can use map with None. It is a little known feature of map (but map change...
Better to 'try' something and catch the exception or test if it's possible first to avoid an excepti
... a directory exists, do not do this:
import os, sys
if not os.path.isdir('foo'):
try:
os.mkdir('foo')
except OSError, e
print e
sys.exit(1)
If another thread or process creates the directory between isdir and mkdir, you'll exit. Instead, do this:
import os, sys, errno
try:
os....
How to retrieve a user environment variable in CMake (Windows)
...ke script
You can pass a variable on the line with the cmake invocation:
FOO=1 cmake
or by exporting a variable in BASH:
export FOO=1
Then you can pick it up in a cmake script using:
$ENV{FOO}
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Equivalent of typedef in C#
...nheriting from the class and creating its constructors. E.g.
public class FooList : List<Foo> { ... }
Not the best solution (unless your assembly gets used by other people), but it works.
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Assigning out/ref parameters in Moq
...rn true, and the out argument will return "ack", lazy evaluated
mock.Setup(foo => foo.TryParse("ping", out outString)).Returns(true);
// ref arguments
var instance = new Bar();
// Only matches if the ref argument to the invocation is the same instance
mock.Setup(foo => foo.Submit(ref instanc...
When to choose checked and unchecked exceptions
...ign of exceptions, which the mechanism I described would solve, is that if foo is documented as throwing barException when reading past the end of a file, and foo calls a method which throws barException even though foo isn't expecting it to, the code which calls foo will think the end of the file w...
How to make a JSONP request from Javascript without JQuery?
...
function foo(data)
{
// do stuff with JSON
}
var script = document.createElement('script');
script.src = '//example.com/path/to/jsonp?callback=foo'
document.getElementsByTagName('head')[0].appendChild(script);
// or document.hea...
Mockito How to mock and assert a thrown exception?
...rServiceMock.bar()).willThrow(new MyException());
when(() -> myService.foo());
then(caughtException()).isInstanceOf(MyException.class);
Sample code
Mockito + Catch-Exception + Assertj full sample
Dependencies
eu.codearte.catch-exception:catch-exception:2.0
org.assertj:assertj-core:3.12....
Why is “if not someobj:” better than “if someobj == None:” in Python?
... to False.
This is the "magic" behind short circuiting expressions like:
foo = bar and spam or eggs
which is shorthand for:
if bar:
foo = spam
else:
foo = eggs
although you really should write:
foo = spam if bar else egg
...
How to show git log history for a sub directory of a git repo?
...
From directory foo/, use
git log -- A
You need the '--' to separate <path>.. from the <since>..<until> refspecs.
# Show changes for src/nvfs
$ git log --oneline -- src/nvfs
d6f6b3b Changes for Mac OS X
803fcc3 Initia...