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Can I set the height of a div based on a percentage-based width? [duplicate]

...at value? So that when the browser window is 1000px wide, the div's height and width are both 500px. 4 Answers ...
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Impossible to Install PG gem on my mac with Mavericks

... If you want to avoid using MacPorts, you can download the Postgres App and place it into the Application directory. Then, specify the location of newly downloaded pg_config: gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/latest/bin/pg_config If you run in to...
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Getting an empty JQuery object

In the following code I set up a change handler on a select box to show and hide some follow up questions based on the value of the selection. ...
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iOS Safari – How to disable overscroll but allow scrollable divs to scroll normally?

I'm working on an iPad-based web app, and need to prevent overscrolling so that it seems less like a web page. I'm currently using this to freeze the viewport and disable overscroll: ...
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How do I raise the same Exception with a custom message in Python?

...thon 3, check Ben's answer To attach a message to the current exception and re-raise it: (the outer try/except is just to show the effect) For python 2.x where x>=6: try: try: raise ValueError # something bad... except ValueError as err: err.message=err.message+" hello" ...
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Number of days between two dates in Joda-Time

...ime instances? With ‘difference in days’ I mean if start is on Monday and end is on Tuesday I expect a return value of 1 regardless of the hour/minute/seconds of the start and end dates. ...
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Sass calculate percent minus px

... No argument there, but count the browsers! More support calc() than not, and even more will support it in the near future! – chrisgonzalez Feb 13 '13 at 17:20 5 ...
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How to migrate back from initial migration in Django 1.7?

I created a new app with some models and now I noticed that some of the models are poorly thought out. As I haven't committed the code the sensible thing would be to migrate the database to last good state and redo the migration with better models. In this case the last good state is database where ...
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Git - Difference Between 'assume-unchanged' and 'skip-worktree'

...us' as something to be staged. I would like to hide this particular change and not commit it. I won't make any other changes to the file. ...
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Getting vertical gridlines to appear in line plot in matplotlib

I want to get both horizontal and vertical grid lines on my plot but only the horizontal grid lines are appearing by default. I am using a pandas.DataFrame from an sql query in python to generate a line plot with dates on the x-axis. I'm not sure why they do not appear on the dates and I have trie...