大约有 40,000 项符合查询结果（耗时：0.0315秒） [XML]
Django filter queryset __in for *every* item in list
...ries.
You also have the option of using custom queries.
Some examples
Test setup:
class Photo(models.Model):
tags = models.ManyToManyField('Tag')
class Tag(models.Model):
name = models.CharField(max_length=50)
def __unicode__(self):
return self.name
In [2]: t1 = Tag.obje...
Including all the jars in a directory within the Java classpath
...e following:
Use straight quotes (")
Use *, not *.jar
Windows
java -cp "Test.jar;lib/*" my.package.MainClass
Unix
java -cp "Test.jar:lib/*" my.package.MainClass
This is similar to Windows, but uses : instead of ;. If you cannot use wildcards, bash allows the following syntax (where lib is the ...
How to find out if a Python object is a string?
...
Python 2
Use isinstance(obj, basestring) for an object-to-test obj.
Docs.
share
|
improve this answer
|
follow
|
...
How to convert PascalCase to pascal_case?
...
Try this on for size:
$tests = array(
'simpleTest' => 'simple_test',
'easy' => 'easy',
'HTML' => 'html',
'simpleXML' => 'simple_xml',
'PDFLoad' => 'pdf_load',
'startMIDDLELast' => 'start_middle_last',
'AString' =>...
Count the number of commits on a Git branch
...on the branch-name as well.
Examples
git checkout master
git checkout -b test
<We do 3 commits>
git rev-list --count HEAD ^master
Result: 3
If your branch comes of a branch called develop:
git checkout develop
git checkout -b test
<We do 3 commits>
git rev-list --count HEAD ^develo...
How do I select text nodes with jQuery?
...ype == 3) {
if (includeWhitespaceNodes || nonWhitespaceMatcher.test(node.nodeValue)) {
textNodes.push(node);
}
} else {
for (var i = 0, len = node.childNodes.length; i < len; ++i) {
getTextNodes(node.childNodes[i]);
...
Citing the author of a blockquote using Markdown syntax
...e. Generated from https://en.wikipedia.org/wiki/Special:CiteThisPage
> Test-driven development (TDD) is a software development process that relies on the repetition of a very short development cycle: requirements are turned into very specific test cases, then the software is improved to pass the...
(Built-in) way in JavaScript to check if a string is a valid number
...er". "not a number" is not the same as "IEEE-794 NaN", which is what isNaN tests for. In particular, this usage fails when testing booleans and empty strings, at least. See developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/….
– EML
Dec 30 '13 at 0:33
...
static linking only some libraries
...ly linking in of a specific library. Example:
# echo "int main() {}" > test.cpp
# c++ test.cpp /usr/lib/libX11.a
# ldd a.out
linux-vdso.so.1 => (0x00007fff385cc000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007f9a5b233000)
libm.so.6 => /lib/libm.so.6 (0x00007f9a5afb0000)
libgcc_s....
Templated check for the existence of a class member function?
...{
int helloworld() { return 0; }
};
struct Generic {};
// SFINAE test
template <typename T>
class has_helloworld
{
typedef char one;
struct two { char x[2]; };
template <typename C> static one test( decltype(&C::helloworld) ) ;
template <typename C> s...