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How to see top processes sorted by actual memory usage?
I have a server with 12G of memory. A fragment of top is shown below:
12 Answers
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Bash empty array expansion with `set -u`
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The only safe idiom is ${arr[@]+"${arr[@]}"}
This is already the recommendation in ikegami's answer, but there's a lot of misinformation and guesswork in this thread. Other patterns, such as ${arr[@]-} or ${arr[@]:0}, are not safe across all ma...
Exposing database IDs - security risk?
I've heard that exposing database IDs (in URLs, for example) is a security risk, but I'm having trouble understanding why.
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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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MongoDB relationships: embed or reference?
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This is more an art than a science. The Mongo Documentation on Schemas is a good reference, but here are some things to consider:
Put as much in as possible
The joy of a Document database is that it eliminates lots of Joins. ...
Convert date to datetime in Python
Is there a built-in method for converting a date to a datetime in Python, for example getting the datetime for the midnight of the given date? The opposite conversion is easy: datetime has a .date() method.
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Threading pool similar to the multiprocessing Pool?
Is there a Pool class for worker threads , similar to the multiprocessing module's Pool class ?
9 Answers
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How do I load the contents of a text file into a javascript variable?
...I'd like to load it into a variable in javascript.. in groovy I would do this:
9 Answers
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What is the difference between jQuery: text() and html() ?
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I think the difference is nearly self-explanatory. And it's super trivial to test.
jQuery.html() treats the string as HTML, jQuery.text() treats the content as text
<html>
<head>
<title>Test Page</title>
<script ty...
Fetch the row which has the Max value for a column
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This will retrieve all rows for which the my_date column value is equal to the maximum value of my_date for that userid. This may retrieve multiple rows for the userid where the maximum date is on multiple rows.
select userid,...