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Creation timestamp and last update timestamp with Hibernate and MySQL
For a certain Hibernate entity we have a requirement to store its creation time and the last time it was updated. How would you design this?
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Custom CSS Scrollbar for Firefox
...://bugzilla.mozilla.org/show_bug.cgi?id=77790
As far as JavaScript replacements go, you can try:
https://github.com/mdbootstrap/perfect-scrollbar
https://github.com/Grsmto/simplebar
https://github.com/vitch/jScrollPane
sh...
Mean per group in a data.frame [duplicate]
I have a data.frame and I need to calculate the mean per group (i.e. per Month , below).
8 Answers
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How to enumerate an enum with String type?
For example, how can I do something like:
42 Answers
42
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Eclipse debugger always blocks on ThreadPoolExecutor without any obvious exception, why?
...ason, I don't exploit any new feature, I just wanted to try that). Every time I debug my application, it happens that Eclipse debugger pops out like it has reached a breakpoint, but it is not the case, in fact it stops on a Java source file that is ThreadPoolExecutor . There is no stack trace on th...
What does “Content-type: application/json; charset=utf-8” really mean?
...T service I include Content-type: application/json; charset=utf-8 in the message header. Without this header, I get an error from the service. I can also successfully use Content-type: application/json without the ;charset=utf-8 portion.
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Inserting a Link to a Webpage in an IPython Notebook
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For me, certain special characters like "(" or ")" may brake the file/page path and lead to the link not working. I fixed it by replacing them with the code equivalents found here and then everything worked. theukwebdesigncompany...
Argparse optional positional arguments?
I have a script which is meant to be used like this:
usage: installer.py dir [-h] [-v]
3 Answers
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Why use double indirection? or Why use pointers to pointers?
...ol;
//fill data structure
word = malloc(4 * sizeof *word); // assume it worked
strcpy(word, "foo");
sentence = malloc(4 * sizeof *sentence); // assume it worked
sentence[0] = word;
sentence[1] = word;
sentence[2] = word;
sentence[3] = NULL;
monologue = malloc(4...
For i = 0, why is (i += i++) equal to 0?
...ppens is more involved than that - take a look at MSDN, 7.5.9 Postfix increment and decrement operators:
The run-time processing of a postfix increment or decrement operation of the form x++ or x-- consists of the following steps:
If x is classified as a variable:
x is evaluated ...