大约有 43,000 项符合查询结果（耗时：0.0381秒） [XML]
Is it possible to await an event instead of another async method?
...kCompletionSource<object> continueClicked;
private async void Button_Click_1(object sender, RoutedEventArgs e)
{
// Note: You probably want to disable this button while "in progress" so the
// user can't click it twice.
await GetResults();
// And re-enable the button here, possibly ...
How to use phpexcel to read data and insert into database?
...d an Excel file and transfer the data into a database
// Include PHPExcel_IOFactory
include 'PHPExcel/IOFactory.php';
$inputFileName = './sampleData/example1.xls';
// Read your Excel workbook
try {
$inputFileType = PHPExcel_IOFactory::identify($inputFileName);
$objReader = PHPExcel_IOFa...
C++对象布局及多态探索之菱形结构虚继承 - C/C++ - 清泛网 - 专注C/C++及内核技术
...0则从C100和C101多重继承而来。
struct C041
{
C041() : c_(0x01) {}
virtual void foo() { c_ = 0x02; }
char c_;
};
struct C100 : public virtual C041
{
C100() : c_(0x02) {}
char c_;
};
struct C101 : public virtual C041
{
C101() : c_(0x03) {}
...
Execution time of C program
...es calculating the number of clocks the program took divided by the Clocks_per_second value.
16 Answers
...
How much faster is Redis than mongoDB?
...is()
mongo = Connection().test
collection = mongo['test']
collection.ensure_index('key', unique=True)
def mongo_set(data):
for k, v in data.iteritems():
collection.insert({'key': k, 'value': v})
def mongo_get(data):
for k in data.iterkeys():
val = collection.find_one({'key'...
What is setup.py?
...ts and also from [I]Python prompts.
It does the similar job of pip, easy_install etc.,
Using setup.py
Let's start with some definitions:
Package - A folder/directory that contains __init__.py file.
Module - A valid python file with .py extension.
Distribution - How one package relates to ...
What does `:_*` (colon underscore star) do in Scala?
...to the method with repeated parameters (as denoted with Node* above).
The _* type annotation is covered in "4.6.2 Repeated Parameters" of the SLS.
The last value parameter of a parameter section may be suffixed by “*”, e.g. (..., x:T *). The type of such a repeated parameter inside th...
Serializing object that contains cyclic object value
... if (typeof v =='object') {
if ( !seen.indexOf(v) ) { return '__cycle__'; }
seen.push(v);
} return v;
});
return jso;
};
var obj={
g:{
d:[2,5],
j:2
},
e:10
};
obj.someloopshere = [
obj.g,
obj,
{ a: [ obj.e, obj ] }
];
c...
Check if a number is int or float
...>> if isinstance(x, int):
print 'x is a int!'
x is a int!
_EDIT:_
As pointed out, in case of long integers, the above won't work. So you need to do:
>>> x = 12L
>>> import numbers
>>> isinstance(x, numbers.Integral)
True
>>> isinstance(x, int)
F...
Django: How to completely uninstall a Django app?
...clear docs for more information. Basically, running ./manage.py sqlclear my_app_name gets you get the SQL statements that should be executed to get rid of all traces of the app in your DB. You still need to copy and paste (or pipe) those statements into your SQL client. For Django 1.7 and up, use ./...