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How to select rows from a DataFrame based on column values?
How to select rows from a DataFrame based on values in some column in Pandas?
10 Answers
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How do I initialize a byte array in Java?
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Alternatively you could use Google Guava:
import com.google.common.io.BaseEncoding;
private static final byte[] CDRIVES = BaseEncoding.base16().lowerCase().decode("E04FD020ea3a6910a2d808002b30309d".toLowerCase());
The Guava method is overkill, when you are using small arrays. But Guava has al...
How to fix error with xml2-config not found when installing PHP from sources?
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I had the same issue when I used a DockerFile.
My Docker is based on the php:5.5-apache image.
I got that error when executing the command "RUN docker-php-ext-install soap"
I have solved it by adding the following command to my DockerFile
"RUN apt-get update && apt-get ins...
what is difference between success and .done() method of $.ajax
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Success/error/complete are deprecated and based on AJAX state changes; done/fail/always are based on jQuery Deferred state changes. See api.jquery.com/category/deferred-object.
– mickeyreiss
Dec 29 '12 at 2:22
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How can I combine flexbox and vertical scroll in a full-height app?
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The current spec says this regarding flex: 1 1 auto:
Sizes the item based on the width/height properties, but makes
them fully flexible, so that they absorb any free space along the main
axis. If all items are either flex: auto, flex: initial, or flex:
none, any positive free space afte...
Proper use of the IDisposable interface
...ollector to eventually come along and free it? What if there's an open database connection? Surely we don't want that connection sitting open, waiting for the GC to finalize the object.
If the user has called Dispose() (meaning they no longer plan to use the object) why not get rid of those wastefu...
How to step back in Eclipse debugger?
... The UI is rather clunky, and it can have a hard time handling large code bases, but for some cases it can really save a lot of time.
Update: Chronon provides a commercial product that it describes as a "DVR for Java", which appears to do a lot of the same things as the ODB.
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PreparedStatement IN clause alternatives?
...g any(String sql, final int params) {
// Create a comma-delimited list based on the number of parameters.
final StringBuilder sb = new StringBuilder(
new String(new char[params]).replace("\0", "?,")
);
// Remove trailing comma.
sb.setLength(Math.max(sb.length() - 1, ...
LINQ query to select top five
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This seems to take as many results from the database as match the equality conditions, and only after they are taken from the database does it apply the take(5) restriction within the application. Is there a way to literally take only the first 5 rows from the database?
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How does the main() method work in C?
...ents.
The leftmost arguments are closer to the top of the stack, or to the base of the stack frame, so that spurious arguments do not invalidate the addressing.
One set of calling conventions which obeys these rules is stack-based parameter passing whereby the caller pops the arguments, and they a...