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MongoDB Many-to-Many Association
... user document:
{name:"Joe"
,roles:["Admin","User","Engineer"]
}
To get all the Engineers, use:
db.things.find( { roles : "Engineer" } );
If you want to maintain the roles in separate documents then you can include the document's _id in the roles array instead of the name:
{name:"Joe"
,roles:...
Javascript - How to detect if document has loaded (IE 7/Firefox 3)
I want to call a function after a document loads, but the document may or may not have finished loading yet. If it did load, then I can just call the function. If it did NOT load, then I can attach an event listener. I can't add an eventlistener after onload has already fired since it won't get cal...
How to JSON serialize sets?
...s.
As shown in the json module docs, this conversion can be done automatically by a JSONEncoder and JSONDecoder, but then you would be giving up some other structure you might need (if you convert sets to a list, then you lose the ability to recover regular lists; if you convert sets to a dictionar...
How can I create a keystore?
...stribution and can be located at %JAVA_HOME%\bin. On Windows this would usually be C:\Program Files\Java\jre7\bin.
So on Windows, open a command window and switch to that directory and enter a command like this
keytool -genkey -v -keystore my-release-key.keystore -alias alias_name -keyalg RSA -keysi...
How to make a class JSON serializable
...t;>> magic(f)
'{"fname": "/foo/bar"}'
In that case you can merely call json.dumps(f.__dict__).
If you want more customized output then you will have to subclass JSONEncoder and implement your own custom serialization.
For a trivial example, see below.
>>> from json import JSONE...
Getting the ID of the element that fired an event
...g like this: $(event.target).eq(0). You can then use any method you'd normally use with a dom element like $(event.target).eq(0).find('li') for example.
– Rooster
Jan 23 '13 at 19:08
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Two way/reverse map [duplicate]
...
1
>>> del d['foo']
>>> d['bar']
Traceback (most recent call last):
File "<stdin>", line 7, in <module>
KeyError: 'bar'
I'm sure I didn't cover all the cases, but that should get you started.
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Access an arbitrary element in a dictionary in Python
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for a non-destructive popitem you can make a (shallow) copy: key, value = dict(d).popitem()
– Pelle
Jan 31 '18 at 10:35
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Query to list all stored procedures
What query can return the names of all the stored procedures in a SQL Server database
23 Answers
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How can “while (i == i) ;” be a non-infinite loop in a single threaded application?
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its mathematically solid, why should one unreal number equal another? 5/0 != sqrt(-4)
– Gordon Gustafson
Sep 9 '09 at 1:11
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