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Python JSON serialize a Decimal object

... The problem was that DecimalEncoder()._iterencode(decimal.Decimal('3.9')).next() returned the correct '3.9', but DecimalEncoder()._iterencode(3.9).next() returned a generator object which would only return '3.899...' when you piled on another .next(). Generator f...
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What's the difference between eval, exec, and compile?

... The short answer, or TL;DR Basically, eval is used to evaluate a single dynamically generated Python expression, and exec is used to execute dynamically generated Python code only for its side effects. eval and exec have these two differences: eval accep...
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How do you rename a MongoDB database?

... changes to every shard if the DB is sharded, plus the config servers have all the shard metadata in terms of namespaces with their full names. There would be absolutely no way to do this on a live system. To do it offline, it would require re-writing every single database file to accommod...
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Program only crashes as release build — how to debug?

I've got a "Schroedinger's Cat" type of problem here -- my program (actually the test suite for my program, but a program nonetheless) is crashing, but only when built in release mode, and only when launched from the command line. Through caveman debugging (ie, nasty printf() messages all over the ...
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SQL Server database backup restore on lower version

...R2 or restore the backup you have on a SQL Server 2008 R2 instance, export all the data and import it on a SQL Server 2008 database. share | improve this answer | follow ...
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Difference between fold and reduce?

... So basically instead of doing fold, you can simply add that initial value to the start of the list and do reduce? What's the point of fold then? – Pacerier Feb 7 '17 at 9:42 ...
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How do you disable the unused variable warnings coming out of gcc in 3rd party code I do not wish to

...ut the stuff you have no control over. For example, instead of -IC:\\boost_1_52_0, say -isystem C:\\boost_1_52_0. Hope it helps. Good Luck! share | improve this answer | fo...
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Why is SQL Server 2008 Management Studio Intellisense not working?

...en to insanity trying to figure out why Intellisense just fails to work at all. The server I'm using is local and is 2008, the database is set to 2008 compatibility, Intellisense is on in every menu I can find, and yet no member list will pop up even with a CTRL-J. ...
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Nested Models in Backbone.js, how to approach

...n modify the parse method to change a attributes around in the object, but all of that is actually pretty unmaintainable code IMO, and feels more of a hack than a solution. Here's what I suggest for your example: First define your Layout Model like so. var layoutModel = Backbone.Model.extend({});...
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Multiprocessing vs Threading Python [duplicate]

... There is actually a good deal of difference: eli.thegreenplace.net/2012/01/16/… – Andrew Sledge May 29 '13 at 11:36 ...