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Foreign keys in mongo?
... Mongoid or MongoMapper.
http://mongoid.org/docs/relations/referenced/1-n.html
In a NoSQL database like MongoDB there are not 'tables' but collections. Documents are grouped inside Collections. You can have any kind of document – with any kind of data – in a single collection. Basically, in a ...
What's the difference between an exclusive lock and a shared lock?
...quest read locks.
More on that : http://www.gnu.org/software/libc/manual/html_node/File-Locks.html
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How to call an external command?
...use shlex.split for an easy way to do this docs.python.org/2/library/shlex.html#shlex.split
– Daniel F
Sep 20 '18 at 18:05
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How to properly add cross-site request forgery (CSRF) token using PHP
... token. The problem I'm having is that the token is only showing up in the HTML "value" some of the time. The rest of the time, the value is empty. Here is the code I am using on the AJAX form:
...
Why is setTimeout(fn, 0) sometimes useful?
...the JSFiddle illustrating these examples: http://jsfiddle.net/C2YBE/31/ :
HTML code:
<table border=1>
<tr><td><button id='do'>Do long calc - bad status!</button></td>
<td><div id='status'>Not Calculating yet.</div></td>
&l...
How does deriving work in Haskell?
...c is clearly specified at haskell.org/onlinereport/haskell2010/haskellch11.html.
– Wong Jia Hau
Feb 9 '19 at 9:02
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Given final block not properly padded
...s described here:
http://www.rsa.com/products/bsafe/documentation/cryptoj35html/doc/dev_guide/group_CJ_SYM__PAD.html
(I assume you have the issue when you try to encrypt)
You can choose your padding schema when you instantiate the Cipher object. Supported values depend on the security provider you...
Explaining Python's '__enter__' and '__exit__'
...lp others here is the link:
https://docs.python.org/2/reference/datamodel.html#with-statement-context-managers
https://docs.python.org/3/reference/datamodel.html#with-statement-context-managers
(detail is the same for both versions)
object.__enter__(self)
Enter the runtime context related to ...
How to generate gcc debug symbol outside the build target?
...b) help symbol-file
Ref:
https://sourceware.org/gdb/onlinedocs/gdb/Files.html#Files
https://sourceware.org/gdb/onlinedocs/gdb/Separate-Debug-Files.html
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How do I set cell value to Date and apply default Excel date format?
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http://poi.apache.org/spreadsheet/quick-guide.html#CreateDateCells
CellStyle cellStyle = wb.createCellStyle();
CreationHelper createHelper = wb.getCreationHelper();
cellStyle.setDataFormat(
createHelper.createDataFormat().getFormat("m/d/yy h:mm"));
cell = row.create...