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Django set default form values
...ut you needing to do anything extra). Personally, I prefer to specify default values in the form definition and only use the initial=... mechanism if the desired default is a dynamic value (e.g. something entered by a user, or based on their login, geographical location, etc.)
–...
C++ where to initialize static const
...an now define static member variables in the class definition:
#include <string>
class foo {
public:
foo();
foo( int );
private:
inline static const std::string s { "foo" };
};
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What is the difference between `new Object()` and object literal notation?
...ng unusual" that someone could do would be to shadow or assign to the default Object global:
// Don't do this
Object = 23;
In that highly-unusual case, new Object will fail but {} will work.
In practice, there's never a reason to use new Object rather than {} (unless you've done that very unusua...
Prevent tabstop on A element (anchor link) in HTML
Is it possible to cancel an <a href="..."> from being tabstopped in any browser? I would like to do this without Javascript.
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Use didSelectRowAtIndexPath or prepareForSegue method for UITableView?
... sender cell, e.g. sender cell is not selected (accessory action), or in multiple selection case. The best way is getting indexPath for segue sender:
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
__auto_type itemViewController = (id<ItemViewController>)segue.desti...
binning data in python with scipy/numpy
...n_means = [data[digitized == i].mean() for i in range(1, len(bins))]
An alternative to this is to use numpy.histogram():
bin_means = (numpy.histogram(data, bins, weights=data)[0] /
numpy.histogram(data, bins)[0])
Try for yourself which one is faster... :)
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Show filename and line number in grep output
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This also displays the result and not just the filename and line number
– elig
Jan 24 at 7:30
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What characters can be used for up/down triangle (arrow without stem) for display in HTML?
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The ALT Codes for these are (Alt + 30) ▲, (Alt + 31) ▼, (Alt + 16) ►, (Alt + 17) ◄, for those tying to type these in manually.
– Nate
Jun 16 '14 at 14:31
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What is the purpose of using -pedantic in GCC/G++ compiler?
...tween different compilers on other platforms. As soon as you start using <windows.h>, compatibility with other systems becomes problematic.
– Jonathan Leffler
May 19 '10 at 4:56
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Grepping a huge file (80GB) any way to speed it up?
... on a fairly powerful linux server which is otherwise not overloaded.
Any alternative to grep? Anything about my syntax that can be improved, (egrep,fgrep better?)
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