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Overriding id on create in ActiveRecord
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worked for me. saved my life. used on rails 4.0.0 / postgres 9.3.5
– allenwlee
Nov 10 '14 at 15:44
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Inspecting standard container (std::map) contents with gdb
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I think there isn't, at least not if your source is optimized etc. However, there are some macros for gdb that can inspect STL containers for you:
http://sourceware.org/ml/gdb/2008-02/msg00064.html
However, I don't use this, so YMMV
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emacs/elisp: What is the hash (pound, number sign, octothorp) symbol used for?
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There is no difference:
(eq 'my-add #'my-add)
yields t
The # can be used in front of a lambda expression indicating to the byte-compiler that the following expression can be byte compiled, see the docs for Anonymous Functions. But th...
How do I get the name of the current executable in C#?
...n be set to anything. Also getting the assembly location may not be enough if you have an exe with several dlls. Furthermore if you use several AppDomain, Assembly.GetCallingAssembly() returns null.
– user276648
May 16 '12 at 1:19
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Telling gcc directly to link a library statically
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God if only Gnu had made this the default in the first place instead of the lib prefix madness. Oh the time and frustration we would have saved.
– Timmmm
Mar 6 '15 at 10:39
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How can I change Eclipse theme?
...ark theme for Eclipse.
See the article by Lars Vogel in "Eclipse 4 is beautiful – Create your own Eclipse 4 theme":
If you want to play with it, you only need to write a plug-in, create a CSS file and use the org.eclipse.e4.ui.css.swt.theme extension point to point to your file.
If you exp...
Use CSS to automatically add 'required field' asterisk to form inputs
... That is a good solution in many situations, however it doesn't work if absolute positioning or floats are being used to line up the forms (e.g. jsfiddle.net/erqrN/2). I am actually using absolute positioning to line up my forms. I could absolutely position the * but it would mean that I would...
C++, copy set to vector
...: it can't; it only has an iterator into the container. Because of this, if you pass an output iterator directly to std::copy, you must make sure it points to a range that is at least large enough to hold the input range.
std::back_inserter creates an output iterator that calls push_back on a con...
How can I plot separate Pandas DataFrames as subplots?
I have a few Pandas DataFrames sharing the same value scale, but having different columns and indices. When invoking df.plot() , I get separate plot images. what I really want is to have them all in the same plot as subplots, but I'm unfortunately failing to come up with a solution to how and would...
How can I force browsers to print background images in CSS?
...le control over a browser's printing methods. At most you can SUGGEST, but if the browser's print settings have "don't print background images", there's nothing you can do without rewriting your page to turn the background images into floating "foreground" images that happen to be behind other conte...