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Quickly reading very large tables as dataframes

...s a dataframes in R. read.table() has a lot of convenient features, but it seems like there is a lot of logic in the implementation that would slow things down. In my case, I am assuming I know the types of the columns ahead of time, the table does not contain any column headers or row names, an...
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jQuery OR Selector?

...to have "OR" logic in jQuery selectors. For example, I know an element is either a descendant of an element with class classA or classB, and I want to do something like elem.parents('.classA or .classB') . Does jQuery provide such functionality? ...
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Removing transforms in SVG files

I have been struggling with this for a while, and can't seem to find an answer (that works) anywhere. I have an SVG file which looks like this: ...
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How should I ethically approach user password storage for later plaintext retrieval?

As I continue to build more and more websites and web applications I am often asked to store user's passwords in a way that they can be retrieved if/when the user has an issue (either to email a forgotten password link, walk them through over the phone, etc.) When I can I fight bitterly against thi...
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What is the strict aliasing rule?

... A typical situation where you encounter strict aliasing problems is when overlaying a struct (like a device/network msg) onto a buffer of the word size of your system (like a pointer to uint32_ts or uint16_ts). When you overlay a struct...
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Is it possible to make an HTML anchor tag not clickable/linkable using CSS?

...;a style="" href="page.html" class="inactiveLink">page link</a> It makes the link not clickeable and the cursor style an arrow, not a hand as the links have. or use this style in the html: <a style="pointer-events: none; cursor: default;" href="page.html">page link</a> but...
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Safely override C++ virtual functions

I have a base class with a virtual function and I want to override that function in a derived class. Is there some way to make the compiler check if the function I declared in the derived class actually overrides a function in the base class? I would like to add some macro or something that ensures ...
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How to write the Fibonacci Sequence?

...mber 1, endNumber 20 should = only those numbers between 1 & 20), I have written for the program to display all Fibonacci numbers between a range (ie. startNumber 1, endNumber 20 displays = First 20 Fibonacci numbers). I thought I had a sure-fire code. I also do not see why this is happening. ...
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Is there any algorithm in c# to singularize - pluralize a word?

Is there any algorithm in c# to singularize - pluralize a word (in english) or does exist a .net library to do this (may be also in different languages)? ...
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HTML encoding issues - “” character showing up instead of “ ”

... legacy app just starting to misbehave, for whatever reason I'm not sure. It generates a bunch of HTML that gets turned into PDF reports by ActivePDF. ...