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What's the $unwind operator in MongoDB?
...rious operation like sorting, searcing etc.
To know more about $unwind :
https://docs.mongodb.com/manual/reference/operator/aggregation/unwind/
To know more about aggregation :
https://docs.mongodb.com/manual/reference/operator/aggregation-pipeline/
...
sbt-assembly: deduplication found error
...e.spark" %% "spark-core" % "1.1.0" % "provided"
If needed, read more at
https://github.com/sbt/sbt-assembly#excluding-jars-and-files
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How are POST and GET variables handled in Python?
...server. 1. CGI, as a protocol, defines the data transport mechanism in the HTTP protocol. 2. Python can be configured to run as a CGI-script in Apache. 3. The CGI module in Python offers some convenience functions.
Since the HTTP protocol is language-independent, and that Apache's CGI extension is ...
Name node is in safe mode. Not able to leave
... leave
I used the hdfs command instead of the hadoop command.
Check out http://ask.gopivotal.com/hc/en-us/articles/200933026-HDFS-goes-into-readonly-mode-and-errors-out-with-Name-node-is-in-safe-mode- link too
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How to get the last N records in mongodb?
...
Look under Querying: Sorting and Natural Order, http://www.mongodb.org/display/DOCS/Sorting+and+Natural+Order
as well as sort() under Cursor Methods
http://www.mongodb.org/display/DOCS/Advanced+Queries
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What are deferred objects?
...on() { alert("complete"); });
Working Example From Eric Hynds blog post: http://jsfiddle.net/ehynds/Mrqf8/
jqXHR
As of jQuery 1.5, the $.ajax() method returns the jXHR object, which is a superset of the XMLHTTPRequest object. For more information, see thejXHR section of the $.ajax entry
From JQ...
How to detect iPhone 5 (widescreen devices)?
...n .iPadProBig
}
return .unknown
}
}
See it in action
https://gist.github.com/hfossli/bc93d924649de881ee2882457f14e346
Note: If e.g. iPhone 6 is in zoomed mode the UI is a zoomed up version of iPhone 5. These functions is not determining device type, but display mode thus iPhon...
Efficiently updating database using SQLAlchemy ORM
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Skip certain tables with mysqldump
...mant.
More information of how to use the exclude option you can read here: https://dev.mysql.com/doc/refman/5.7/en/mysqlpump.html#mysqlpump-filtering
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Why declare unicode by string in python?
...character '\x81' in file C:\ex.py on line 1, but no
encoding declared; see http://www.python.org/peps/pep-0263.html for details
Output of file with # coding: cp437 added:
über '\x81ber'
über u'\xfcber'
At first, Python didn't know the encoding and complained about the non-ASCII character. On...