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How can I make a div stick to the top of the screen once it's been scrolled to?

I would like to create a div, that is situated beneath a block of content but that once the page has been scrolled enough to contact its top boundary, becomes fixed in place and scrolls with the page. ...
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Editing legend (text) labels in ggplot

... When using ggplot I can't get the right text in the legend, even though it's in my dataframe. I have tried scale_colour_manual , scale_fill_manual with different values for labels= such as c("T999", "T888")", "cols" . ...
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How do HashTables deal with collisions?

... new entry into the 'next available' bucket if the new Key entry collides with another. 10 Answers ...
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Spark java.lang.OutOfMemoryError: Java heap space

...your nodes are configured to have 6g maximum for Spark (and are leaving a little for other processes), then use 6g rather than 4g, spark.executor.memory=6g. Make sure you're using as much memory as possible by checking the UI (it will say how much mem you're using) Try using more partitions, you sho...
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argparse store false if unspecified

...ore false if -auto is unspecified? I can faintly remember that this way, it stores None if unspecified 4 Answers ...
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What is uintptr_t data type

What is uintptr_t and what can it be used for? 5 Answers 5 ...
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Use Mockito to mock some methods but not others

Is there any way, using Mockito, to mock some methods in a class, but not others? 5 Answers ...
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Step-by-step debugging with IPython

...is makes debugging individual functions easy, as you can just load a file with %load and then run a function. You could force an error with an assert at the right position. %pdb is a line magic. Call it as %pdb on, %pdb 1, %pdb off or %pdb 0. If called without argument it works as a toggle. ...
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How to free memory in Java?

...e memory is by relying on the garbage collector. This memory management whitepaper (PDF) may help explain what's going on. You can also call System.gc() to suggest that the garbage collector run immediately. However, the Java Runtime makes the final decision, not your code. According to the Java...
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Insert a line break in mailto body

...ed on Gmail, Yahoo, Apple Mail, Outlook 2010, Outlook.com and Thunderbird with Google Chrome on Mac OSX. 6 Answers ...