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How to add leading zeros?
...t's try a harder example of making powers of 10 width 8 too.
anim <- 25499:25504
x <- 10 ^ (0:5)
paste (and it's variant paste0) are often the first string manipulation functions that you come across. They aren't really designed for manipulating numbers, but they can be used for that. I...
Items in JSON object are out of order using “json.dumps”?
...gt;>> json.dumps(OrderedDict(b=2, a=1))
'{"b": 2, "a": 1}'
See PEP 468 – Preserving Keyword Argument Order.
If your input is given as JSON then to preserve the order (to get OrderedDict), you could pass object_pair_hook, as suggested by @Fred Yankowski:
>>> json.loads('{"a": 1,...
How do I enable/disable log levels in Android?
... WARN = LOGLEVEL > 1;
...
public static boolean VERBOSE = LOGLEVEL > 4;
if (VERBOSE) Log.v(TAG, "Message here"); // Won't be shown
if (WARN) Log.w(TAG, "WARNING HERE"); // Still goes through
Later, you can just change the LOGLEVEL for all debug output level.
...
How can I call controller/view helper methods from the console in Ruby on Rails?
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14 Answers
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Active
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What does “|=” mean? (pipe equal operator)
...e than 1<<1 or 10 in binary
public static final int DEFAULT_LIGHTS = 4; // is the same than 1<<2 or 100 in binary
So you can use bit-wise OR to add flags
int myFlags = DEFAULT_SOUND | DEFAULT_VIBRATE; // same as 001 | 010, producing 011
so
myFlags |= DEFAULT_LIGHTS;
simply means ...
In mongoDb, how do you remove an array element by its index?
.... In fact, this is an open issue http://jira.mongodb.org/browse/SERVER-1014 , you may vote for it.
The workaround is using $unset and then $pull:
db.lists.update({}, {$unset : {"interests.3" : 1 }})
db.lists.update({}, {$pull : {"interests" : null}})
Update: as mentioned in some of the comment...
How to zip a whole folder using PHP
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324
Code updated 2015/04/22.
Zip a whole folder:
// Get real path for our folder
$rootPath = realp...
Can't find the 'libpq-fe.h header when trying to install pg gem
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41 Answers
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使用CSplitterWnd实现拆分窗口（多视图显示） - C/C++ - 清泛网 - 专注C/C++及内核技术
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if(!m_wndSplitter.CreateView(0,0,RUNTIME_CLASS(CTest),CSize(rect.Width()/4,rect.Height()),pContext)||
!m_wndSplitter.CreateView(0,1,RUNTIME_CLASS(CSplitterSDIView), CSize(rect.Width()/4*3,rect.Height()),pContext))
{
return FALSE;
}
return TRUE;
}
重载该函数之前需要做的步...
How to set data attributes in HTML elements
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464
HTML
<div id="mydiv" data-myval="10"></div>
JS
var a = $('#mydiv').data('myval...