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How expensive is RTTI?
...endl;
Standard RTTI is expensive because it relies on doing a underlying string compare and thus the speed of RTTI can vary depending on the class name length.
The reason why string compares are used is to make it work consistently across library/DLL boundaries. If you build your application stat...
How to pick just one item from a generator?
... the StopIteration exception. For example next(g, None) for a generator of strings will either yield a string or None after the iteration was finished.
– Attila
Mar 6 '13 at 14:18
...
Zooming MKMapView to fit annotation pins?
...
Very nice solution!!! Here's an extra little touch to add some padding: double inset = -zoomRect.size.width * 0.1; [self.mapView setVisibleMapRect:MKMapRectInset(zoomRect, inset, inset) animated:YES];
– Craig B
Aug 5 '...
Creating a new DOM element from an HTML string using built-in DOM methods or Prototype
I have an HTML string representing an element: '<li>text</li>' . I'd like to append it to an element in the DOM (a ul in my case). How can I do this with Prototype or with DOM methods?
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How to check if a value exists in a dictionary (python)
... v in test.values() for x in v]
>>True
What if list of values with string values
test = {'key1': ['value4', 'value5', 'value6'], 'key2': ['value9'], 'key3': ['value6'], 'key5':'value10'}
values = test.values()
"value10" in [x for v in test.values() for x in v] or 'value10' in values
>>...
Response.Redirect with POST instead of Get?
...
You can use this aproach:
Response.Clear();
StringBuilder sb = new StringBuilder();
sb.Append("<html>");
sb.AppendFormat(@"<body onload='document.forms[""form""].submit()'>");
sb.AppendFormat("<form name='form' action='{0}' method='post'>",postbackUrl...
Getting raw SQL query string from PDO prepared statements
Is there a way to get the raw SQL string executed when calling PDOStatement::execute() on a prepared statement? For debugging purposes this would be extremely useful.
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C++ display stack trace on exception
...possibly corrupt>\n");
return;
}
// resolve addresses into strings containing "filename(function+address)",
// this array must be free()-ed
char** symbollist = backtrace_symbols(addrlist, addrlen);
// allocate string which will be filled with the demangled function name
...
Python List vs. Array - when to use?
...ctl or fctnl).
array.array is also a reasonable way to represent a mutable string in Python 2.x (array('B', bytes)). However, Python 2.6+ and 3.x offer a mutable byte string as bytearray.
However, if you want to do math on a homogeneous array of numeric data, then you're much better off using NumPy,...
Conveniently Declaring Compile-Time Strings in C++
Being able to create and manipulate strings during compile-time in C++ has several useful applications. Although it is possible to create compile-time strings in C++, the process is very cumbersome, as the string needs to be declared as a variadic sequence of characters, e.g.
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