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Why are margin/padding percentages in CSS always calculated against width?

... The actual reasoning of why the spec is written this way is still, technically, unknown. Element height is defined by the height of the children. If an element has padding-top: 10% (relative to parent height), that is going to affect the height of the parent. Since the height of the child...
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How to save a Python interactive session?

...ntly using Python's interpreter to work with databases, files, etc -- basically a lot of manual formatting of semi-structured data. I don't properly save and clean up the useful bits as often as I would like. Is there a way to save my input into the shell (db connections, variable assignments, lit...
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HTML 5: Is it , , or ?

I've tried checking other answers , but I'm still confused — especially after seeing W3schools HTML 5 reference . 27 An...
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Echo a blank (empty) line to the console from a Windows batch file [duplicate]

...lank line from cmd.exe that is guaranteed to work (or work efficiently) in all situations. With that in mind, here is a discussion of methods that have been recommended for outputting a blank line from cmd.exe. All recommendations are based on variations of the echo command. echo. While this w...
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Accessing the web page's HTTP Headers in JavaScript

... exactly equal to the current. Use the following JavaScript code to get all the HTTP headers by performing a get request: var req = new XMLHttpRequest(); req.open('GET', document.location, false); req.send(null); var headers = req.getAllResponseHeaders().toLowerCase(); alert(headers); ...
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Swing vs JavaFx for desktop applications [closed]

... What will be cleaner and easier to maintain? All things being equal, probably JavaFX - the API is much more consistent across components. However, this depends much more on how the code is written rather than what library is used to write it. And what will be faster...
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Why use pip over easy_install? [closed]

... Many of the answers here are out of date for 2015 (although the initially accepted one from Daniel Roseman is not). Here's the current state of things: Binary packages are now distributed as wheels (.whl files)—not just on PyPI, but in third-party repositories like Christoph Gohlke's Exten...
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Why is using a wild card with a Java import statement bad?

...t and com.mycompany.calendar.Event, and so you can't even compile. You actually manage only to import one (only one of your two imports does .*), but it's the wrong one, and you struggle to figure out why your code is claiming the type is wrong. When you compile your code there is no com.mycompany.c...
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How to prevent form from submitting multiple times from client side?

... I tried this solution with unobtrusive validation & MVC. The JS gets called first which always return false and then validation is called. So if my form has some validation error the form never gets submitted!! – bjan Jun 8 '12 at 12:09 ...
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How can I generate an INSERT script for an existing SQL Server table that includes all stored rows?

I'm looking for a way to generate a "Create and insert all rows" script with SQL Management Studio 2008 R2. 4 Answers ...