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Get event listeners attached to node using addEventListener
... 'old' prototype methods):
var ListenerTracker=new function(){
var is_active=false;
// listener tracking datas
var _elements_ =[];
var _listeners_ =[];
this.init=function(){
if(!is_active){//avoid duplicate call
intercep_events_listeners();
}
...
Is there a way to check if WPF is currently executing in design mode or not?
... interest of completeness, the equivalent in WinRT / Metro / Windows Store applications is DesignModeEnabled:
Windows.ApplicationModel.DesignMode.DesignModeEnabled
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...
MIN and MAX in C
...afety bonus too) in a GCC statement expression:
#define max(a,b) \
({ __typeof__ (a) _a = (a); \
__typeof__ (b) _b = (b); \
_a > _b ? _a : _b; })
Everyone says "oh I know about double evaluation, it's no problem" and a few months down the road, you'll be debugging the silliest ...
python: How do I know what type of exception occurred?
...pe {0} occurred. Arguments:\n{1!r}"
message = template.format(type(ex).__name__, ex.args)
print message
Make sure message is brought to the attention of the user in a hard-to-miss way! Printing it, as shown above, may not be enough if the message is buried in lots of other messages. Failin...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...、OceanBase启动时的使用模式
二、 基础数据结构
2.1 easy_list_t
2.2 easy_pool_t
2.3 easy_buf_t
2.4 easy_connection_t
三、 连接建立
四、 同步处理(OceanBase少量使用这种模式)
五、 异步处理(OceanBase大量采用这种模式)
六、 资源管理
...
How to implement a binary tree?
...plementation of binary search tree.
#!/usr/bin/python
class Node:
def __init__(self, val):
self.l = None
self.r = None
self.v = val
class Tree:
def __init__(self):
self.root = None
def getRoot(self):
return self.root
def add(self, val):
...
Swift Beta performance: sorting arrays
...level [-O].
Here is an in-place quicksort in Swift Beta:
func quicksort_swift(inout a:CInt[], start:Int, end:Int) {
if (end - start < 2){
return
}
var p = a[start + (end - start)/2]
var l = start
var r = end - 1
while (l <= r){
if (a[l] < p){
...
Is int[] a reference type or a value type?
...ways reference types
which are allocated on the managed
heap, and your app's variable contains
a reference to the array and not the
array itself.
https://msdn.microsoft.com/en-us/library/bb985948.aspx
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Django ManyToMany filter()
...
Just restating what Tomasz said.
There are many examples of FOO__in=... style filters in the many-to-many and many-to-one tests. Here is syntax for your specific problem:
users_in_1zone = User.objects.filter(zones__id=<id1>)
# same thing but using in
users_in_1zone = User.object...
AfxGetMainWnd函数解惑 - C/C++ - 清泛网 - 专注C/C++及内核技术
...时也会失灵。不信， 你测试一下下面的代码：
unsigned __stdcall SecondThreadFunc( void* pArguments )
{
CMainFrame* pMainWnd = (CMainFrame*)AfxGetMainWnd();
if (NULL!=pMainWnd)
{
CView *pView = pMainWnd->GetActiveView();
if (NULL...