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Ways to implement data versioning in MongoDB
...mory space. You generally don't want a full history for a simple query. So by keeping the history out of the object you can also keep it out of the commonly accessed memory when that data is queried.
To make my life easy, I would make a history document contain a dictionary of time-stamped diffs. S...
Fragment Inside Fragment
... another fragment),
dynamically adding/replacing fragment is working fine, by pressing
button1 fragment replaced, same happens when pressing button, but if
I press the button again, got an exception:
...
Select datatype of the field in postgres
...bigint
ip_addr | inet
You might be able to get all that information by joining other information_schema views, or by querying the system tables directly. psql -E might help with that.
The function pg_typeof() correctly shows the use of test_domain, but doesn't report the details of varchar(n...
How to make a DIV visible and invisible with JavaScript
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visibility has the side effect that the space occupied by the element remains reserved. That may or may not be what the OP wants
– Pekka
Feb 26 '12 at 19:23
1
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How do I create a unique ID in Java? [duplicate]
...ote - if you only need application uniqueness, and AtomicInteger (as noted by Michael Borgwardt) is a much better option, but if you need global uniqueness, a UUID is a much better bet.
– aperkins
Sep 7 '09 at 15:19
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How to sort an array by a date property
... 1 : 0;
});
Generic, Powerful Answer
Define a custom non-enumerable sortBy function using a Schwartzian transform on all arrays :
(function(){
if (typeof Object.defineProperty === 'function'){
try{Object.defineProperty(Array.prototype,'sortBy',{value:sb}); }catch(e){}
}
if (!Array.prot...
Python json.loads shows ValueError: Extra data
... []. The original file I was using all_guests.json had 6 records separated by newline. I deleted 5 records, (which I already checked to be bookended by brackets) and saved the file under a new name. Then the loads statement worked.
Error was
raise ValueError(errmsg("Extra data", s, end, len(s))...
Use C++ with Cocoa Instead of Objective-C?
...he model layer in C++ and the GUI in Cocoa. This is a common approach used by some very large apps, including Mathematica. Your C++ code can be left unchanged (you do not need "funky" apple extensions to write or compile C++ on OS X). Your controller layer will likely make use of Objective-C++ (perh...
XDocument.ToString() drops XML Encoding Tag
... implicit encoding in StringWriter. You can influence that yourself though by creating a subclass of StringWriter, e.g. to always use UTF-8.
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Android - get children inside a View?
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What's the best way to do this recursively and thereby generate a view heirarchy JSON object?
– jimbob
Oct 25 '16 at 10:17
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