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How do I perform the SQL Join equivalent in MongoDB?
...t array field>
}
}
Of course Mongo is not a relational database, and the devs are being careful to recommend specific use cases for $lookup, but at least as of 3.2 doing join is now possible with MongoDB.
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How do I read image data from a URL in Python?
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In Python3 the StringIO and cStringIO modules are gone.
In Python3 you should use:
from PIL import Image
import requests
from io import BytesIO
response = requests.get(url)
img = Image.open(BytesIO(response.content))
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How could the UNIX sort command sort a very large file?
The UNIX sort command can sort a very large file like this:
7 Answers
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Reference: mod_rewrite, URL rewriting and “pretty links” explained
...plained. mod_rewrite is one way to make "pretty links", but it's complex and its syntax is very terse, hard to grok, and the documentation assumes a certain level of proficiency in HTTP. Can someone explain in simple terms how "pretty links" work and how mod_rewrite can be used to create them?
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In git, is there a simple way of introducing an unrelated branch to a repository?
...han branch, named
<new_branch>, started from
<start_point> and switch to it. The
first commit made on this new branch
will have no parents and it will be
the root of a new history totally
disconnected from all the other
branches and commits.
This doesn't do exactly what t...
how to convert binary string to decimal?
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The parseInt function converts strings to numbers, and it takes a second argument specifying the base in which the string representation is:
var digit = parseInt(binary, 2);
See it in action.
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Correct way to write loops for promise.
...ow to correctly construct a loop to make sure the following promise call and the chained logger.log(res) runs synchronously through iteration? (bluebird)
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How to get the return value from a thread in python?
...m) for param in param_list] The order will be maintained, and exiting the with will allow result collection. [f.result() for f in futures]
– jayreed1
Jun 4 at 21:29
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Can I get CONST's defined on a PHP class?
I have several CONST's defined on some classes, and want to get a list of them. For example:
12 Answers
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How can I Remove .DS_Store files from a Git repository?
...r created if it isn't there already). You can do this easily with this command in the top directory
echo .DS_Store >> .gitignore
Then
git add .gitignore
git commit -m '.DS_Store banished!'
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