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Django ModelForm: What is save(commit=False) used for?
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106
That's useful when you get most of your model data from a form, but need to populate some null=...
Number of days between two NSDates [duplicate]
...mponents:NSCalendarUnitDay
fromDate:fromDate toDate:toDate options:0];
return [difference day];
}
EDIT:
Fantastic solution above, here's Swift version below as an extension on NSDate:
extension NSDate {
func numberOfDaysUntilDateTime(toDateTime: NSDate, inTimeZone timeZone: NSTime...
Change timestamps while rebasing git branch
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answered Oct 16 '09 at 18:36
Michael Krelin - hackerMichael Krelin - hacker
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Convert a Unix timestamp to time in JavaScript
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1810
let unix_timestamp = 1549312452
// Create a new JavaScript Date object based on the timesta...
Draw radius around a point in Google map
I'm using the Google Maps API and have added markers. Now I want to add a 10 mile radius around each marker, meaning a circle that behaves appropriately while zooming. I have no idea how to do that and it seems it's not something common.
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Java HashMap performance optimization / alternative
...ted out the hashCode() method was to blame. It was only generating around 20,000 codes for 26 million distinct objects. That is an average of 1,300 objects per hash bucket = very very bad. However if I turn the two arrays into a number in base 52 I am guaranteed to get a unique hash code for every o...
Difference between size_t and std::size_t
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90
C's size_t and C++'s std::size_t are both same.
In C, it's defined in <stddef.h> and in ...
Two divs, one fixed width, the other, the rest
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10 Answers
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What's the longest possible worldwide phone number I should consider in SQL varchar(length) for phon
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80
Well considering there's no overhead difference between a varchar(30) and a varchar(100) if you'...
CSS opacity only to background color, not the text on it? [duplicate]
...;integer>s or <percentage>s, where the number 255 corresponds to 100%. A (alpha) can be a <number> between 0 and 1, or a <percentage>, where the number 1 corresponds to 100% (full opacity).
RGBa example
rgba(51, 170, 51, .1) /* 10% opaque green */
rgba(51, 170, 51, .4) /...