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How can I use redis with Django?
...s-cache but how exactly does it work? Is it used as a layer between django and my rdbms, by caching the rdbms queries somehow?
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vim, switching between files rapidly using vanilla Vim (no plugins)
I understand that limiting myself to vanilla Vim (not using plugins) limits the power of the editor, but as I switch between different machines frequently, it is often too much trouble to move my environment around everywhere. I want to just stay in vanilla Vim.
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Viewing contents of a .jar file
... @salvob You don't need the hyphen as it takes after tar with the options mandatory.
– Tom Hawtin - tackline
Jan 12 '17 at 16:51
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How would you implement an LRU cache in Java?
...ructures would you use? I've already implemented one using LinkedHashMap and Collections#synchronizedMap , but I'm curious if any of the new concurrent collections would be better candidates.
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Is there a query language for JSON?
... work in progress, but work to some degree. They are also similar to XPath and XQuery conceptually; even though XML and JSON have different conceptual models (hierarchic vs object/struct).
EDIT Sep-2015: Actually there is now JSON Pointer standard that allows very simple and efficient traversal of ...
Why is “throws Exception” necessary when calling a function?
Why compiler reports that methods show2() , show3() , and main() have
8 Answers
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How to find whether or not a variable is empty in Bash
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In Bash at least the following command tests if $var is empty:
if [[ -z "$var" ]]; then
# Do what you want
fi
The command man test is your friend.
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How can I check if a program exists from a Bash script?
... validate that a program exists, in a way that will either return an error and exit, or continue with the script?
37 Answer...
Git Push Error: insufficient permission for adding an object to repository database
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Repair Permissions
After you have identified and fixed the underlying cause (see below), you'll want to repair the permissions:
cd /path/to/repo.git
sudo chgrp -R groupname .
sudo chmod -R g+rwX .
find . -type d -exec chmod g+s '{}' +
Note if you want everyone to be ...
Using WebAPI or MVC to return JSON in ASP.NET
...g an ASP.NET MVC application that is client-script heavy, it will use JSON and jQuery to manipulate the DOM.
6 Answers
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