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Excel RTD(Excel Real-Time Data)实时刷新数据技术 - C/C++ - 清泛网 - 专注C/C++及内核技术
...时行情
上面简单讲解了RTD函数的基本原理，接下来演示如何通过Excel RTD来实现从Google Fiancial API中获取实时行情并刷新数据，Google Financal API，提供了世界各大交易所的实时行情数据，其支持的市场及时效性在其官网上有说明，...
Delete all local changesets and revert to tree
... even smarter approach is to use the revset language, and do:
% hg strip 'roots(outgoing())'
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Pinging servers in Python
...ng
It is pretty simple to use, however, when using this module, you need root access due to the fact that it is crafting raw packets under the hood.
import pyping
r = pyping.ping('google.com')
if r.ret_code == 0:
print("Success")
else:
print("Failed with {}".format(r.ret_code))
...
Does SQLAlchemy have an equivalent of Django's get_or_create?
...ote that begin_nested automatically triggers a flush.
Note that if using MySQL, the transaction isolation level must be set to READ COMMITTED rather than REPEATABLE READ for this to work. Django's get_or_create (and here) uses the same stratagem, see also the Django documentation.
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海量数据相似度计算之simhash短文本查找 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...快的返回一个value，这个号称查找速度最快的数据结构是如何实现的呢？看下hashmap的内部结构：
如果我们需要得到key对应的value，需要经过这些计算，传入key，计算key的hashcode，得到7的位置；发现7位置对应的value还有好几个，...
How do I disable “missing docstring” warnings at a file-level in Pylint?
...
I think the fix is relative easy without disabling this feature.
def kos_root():
"""Return the pathname of the KOS root directory."""
global _kos_root
if _kos_root: return _kos_root
All you need to do is add the triple double quotes string in every function.
...
Where do I put image files, css, js, etc. in Codeigniter?
... One better might be to have a your assets folder in the web root (mine is public_html) folder and then CI in a directory above the web root.
– Nate Nolting
Aug 7 '14 at 21:39
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What is the point of interfaces in PHP?
...ce IPersonService
{
public function Create($personObject);
}
class MySqlPerson implements IPersonService
{
public function Create($personObject)
{
// Create a new person in MySql database.
}
}
class MongoPerson implements IPersonService
{
public function Create($pers...
Where does the .gitignore file belong?
... It's an ambiguous answer IMO. Where in the working directory? In the root of it? Anywhere?
– Carles Alcolea
Aug 19 '16 at 18:47
6
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AngularJS access parent scope from child controller
...other controllers, you can install a "hook" to the global scope:
function RootCtrl($scope) {
$scope.root = $scope;
}
Then in any child controller, you can access the "global" scope with $scope.root. Anything you set here will be globally visible.
Example:
function RootCtrl($scope) {
...