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How to write DataFrame to postgres table?
...
This is how I did it.
It may be faster because it is using execute_batch:
# df is the dataframe
if len(df) > 0:
df_columns = list(df)
# create (col1,col2,...)
columns = ",".join(df_columns)
# create VALUES('%s', '%s",...) one '%s' per column
values = "VALUES({})".for...
Copy a file in a sane, safe and efficient way
I search for a good way to copy a file (binary or text). I've written several samples, everyone works. But I want hear the opinion of seasoned programmers.
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jQuery checkbox checked state changed event
...l, ++title), 1000);
setTimeout(generateRandomArticle.bind(null, ++title), 5000);
setTimeout(generateRandomArticle.bind(null, ++title), 10000);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<section id="post-list" class="list post-list">...
Difference between HBase and Hadoop/HDFS
...ata set.
Provides flexible data model.
Hadoop is most suited for offline batch-processing kinda stuff while HBase is used when you have real-time needs.
An analogous comparison would be between MySQL and Ext4.
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How does libuv compare to Boost/ASIO?
...tform layer for Node.js. It provides an abstraction for IOCP on Windows, kqueue on macOS, and epoll on Linux. Additionally, it looks as though its scope has increased slightly to include abstractions and functionality, such as threads, threadpools, and inter-thread communication.
At their core, e...
How to wait until an element exists?
...time);
}
}
As an example, setting selector="#div1" and time=5000 will look for the HTML tag whose id="div1" every 5000 milliseconds.
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An async/await example that causes a deadlock
...thread
Fact 2: The continuation of the await (return result.ToString()) is queued to the UI thread for execution
Fact 3: The task returned by GetDataAsync() will complete when its queued continuation is run
Fact 4: The queued continuation is never run, because the UI thread is blocked (Fact 1)
Dea...
How to programmatically create and read WEP/EAP WiFi configurations in Android?
...= Toast.makeText(this, "SD CARD mounted and writable? " + root.canWrite(), 5000);
toast.show();
if (root.canWrite())
{
File gpxfile = new File(root, "ReadConfigLog.txt");
FileWriter gpxwriter = new FileWriter(gpxfile);
...
“Collection was mutated while being enumerated” on executeFetchRequest
...ad, but creating the MOC itself too, if this is a private MOC, the related queue is not yet exist ..
– János
Aug 2 '15 at 7:44
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phpunit mock method multiple calls with different arguments
...g the exception, maybe together with Chunk insert them into PostProcessing Queue
}
return false;
}
}
PhpUnit Prophecy solution
class ProcessorTest extends ChunkTestCase
{
/**
* @var Processor
*/
private $processor;
/**
* @var MutatorResolver|Object...