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Persistent invalid graphics state error when using ggplot2

I believe my dataframe is okay and my code is okay. In fact, I have eliminated parts of the dataframe and most of the graphing code to make things as basic as possible. But still, I get: ...
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Should I index a bit field in SQL Server?

...ing (looking at every row). SQL has clustered and non-clustered indexes. My understanding of clustered indexes is that they group similar index values into the same page. This way when you ask for all the rows matching an index value, SQL can return those rows from a clustered page of memory. Th...
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Or versus OrElse

...only makes sense when I call a function after the or that has side effects my code depends on? – Ralph M. Rickenbach Jul 23 '09 at 10:09 4 ...
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npm: disable postinstall script for package

... I wanted to disable postinstall script for my project but wanted all scripts of my project's dependencies to run when I do npm install. This is what I ended up doing. Create a script ./scripts/skip.js if (process.env.SKIP_BUILD) { process.exit(0); } else { ...
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What's the best way of implementing a thread-safe Dictionary?

... My dictionary isn't too large, and I think that did the trick. What I did was make a new public method called CopyForEnum() which returns new instance of a Dictionary with copies of the private dictionary. This method was t...
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Haskell composition (.) vs F#'s pipe forward operator (|>)

...-1 for "use >> to a ridiculous degree". (Well, I didn't but you got my point). F in F# is for "functional", so function composition is legitimate. – Florian F Nov 1 '16 at 20:44 ...
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When to use NSInteger vs. int

...fiers to use in a printf or similar statement. – JeremyP Dec 15 '10 at 9:13 3 What happens if you...
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How can I be notified when an element is added to the page?

I want a function of my choosing to run when a DOM element is added to the page. This is in the context of a browser extension, so the webpage runs independently of me and I cannot modify its source. What are my options here? ...
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How do you use an identity file with rsync?

... Double quotes and using $HOME solved my problem. Can you elaborate on what the first two commands are doing? I was already familiar with setting up a config file - the only problem is when I have multiple accounts on one server. I don't expect that it would let ...
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How to Right-align flex item?

...k the way you may expect, like when there's a .c::after pseudo-element. In my experience, margin-left: auto; is the way to go. – Will Nov 5 '17 at 4:06 15 ...