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How to check if a file is empty in Bash?
... help you.
Notice incidentally that I have swapped the roles of empty.txt and full.txt, as @Matthias suggests.
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cocktail party algorithm SVD implementation … in one line of code?
... a slide within the introductory lecture on machine learning by Stanford's Andrew Ng at Coursera, he gives the following one line Octave solution to the cocktail party problem given the audio sources are recorded by two spatially separated microphones:
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Evaluate empty or null JSTL c tags
...c:choose>
Or if you don't need to conditionally render a bunch of tags and thus you could only check it inside a tag attribute, then you can use the EL conditional operator ${condition? valueIfTrue : valueIfFalse}:
<c:out value="${empty var1 ? 'var1 is empty or null' : 'var1 is NOT empty or n...
Can't open config file: /usr/local/ssl/openssl.cnf on Windows [duplicate]
...t to use a certificate for my nodejs https server. I ran the following command:
7 Answers
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JdbcTemplate queryForInt/Long is deprecated in Spring 3.2.2. What should it be replaced by?
...AccessException {
return queryForObject(sql, args, Integer.class);
}
And then the non deprecated code now must be replaced with the ugly:
queryForObject(sql, new Object { arg1, arg2, ...}, Integer.class);
or this (nicer):
queryForObject(sql, Integer.class, arg1, arg2, ...);
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How to form tuple column from two columns in Pandas
I've got a Pandas DataFrame and I want to combine the 'lat' and 'long' columns to form a tuple.
4 Answers
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A Java API to generate Java source files [closed]
... an API. It's not the easiest thing to get information on, but it's there and it works extremely well.
The easiest way to get hold of it is as part of the JAXB 2 RI - the XJC schema-to-java generator uses CodeModel to generate its java source, and it's part of the XJC jars. You can use it just fo...
Open file dialog box in JavaScript
... <input type='file' /> control itself. But a div is placed over that and css styles are applied to get that feel. Opacity of the file control is set to 0 so that it appears that the dialog window is opened when clicking on the div.
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How to write header row with csv.DictWriter?
Assume I have a csv.DictReader object and I want to write it out as a CSV file. How can I do this?
3 Answers
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What's a good Java, curses-like, library for terminal applications? [closed]
...e, too bad though that it requires native libraries. I'll give this a shot and see how far I get.
– Francisco Canedo
Jan 16 '09 at 12:03
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