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In Ruby on Rails, what's the difference between DateTime, Timestamp, Time and Date?
In my experience, getting dates/times right when programming is always fraught with danger and difficulity.
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Entity framework code-first null foreign key
I have a User < Country model. A user belongs to a country, but may not belong to any (null foreign key).
4 Answers
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Difference between a virtual function and a pure virtual function [duplicate]
What is the difference between a pure virtual function and a virtual function?
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Why does sed not replace all occurrences?
If I run this code in bash:
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Optimal settings for exporting SVGs for the web from Illustrator?
I'm looking to use an SVG logo for a website — to make it look great on a responsive design for all devices.
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How to vertically align into the center of the content of a div with defined width/height?
What would be the correct method to vertically center any content in a defined width/height div .
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What is the difference between Modal and Push segue in Storyboards?
Can someone explain to me what is the exact difference between modal and push segue?
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The quest for the Excel custom function tooltip
This question has been asked before , but each time the accepted answer is simply a resignation to provide function descriptions using Application.MacroOptions ( VBA6 ) ( VBA7 ), but this information does not actually appear as a tooltip, so it does not solve my problem.
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What makes JNI calls slow?
I know that 'crossing boundaries' when making a JNI call in Java is slow.
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Convert String to Float in Swift
I'm trying to convert numbers taken from a UITextField, which I presume, are actually Strings, and convert them to Float, so I can multiply them.
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