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Conventions for exceptions or error codes
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C++17 introduces the nodiscard attribute that will give a compiler warning if the return value of a function is not stored. Helps a little bit to catch forgotten error code checking. Example: godbolt.org/g/6i6E0B
– Zitrax
Mar 23 '17 at 15:24
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“User interaction is not allowed” trying to sign an OSX app using codesign
...s. Nothing helped until I tried the suggestion on http://devnet.jetbrains.com/thread/311971. Thanks ashish agrawal!
Login your build user via the GUI and open Keychain Access. Select your signing private key, right-click, choose Get Info, change to the Access Control tab and select the "Allow al...
Is std::unique_ptr required to know the full definition of T?
...mplates in the C++ standard library require that they be instantiated with complete types. However shared_ptr and unique_ptr are partial exceptions. Some, but not all of their members can be instantiated with incomplete types. The motivation for this is to support idioms such as pimpl using smart po...
How to find duplicates in 2 columns not 1
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You should set up a composite key between the two fields. This will require a unique stone_id and upcharge_title for each row.
As far as finding the existing duplicates try this:
select stone_id,
upcharge_title,
count(*)
f...
Cycles in family tree software
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It seems you (and/or your company) have a fundamental misunderstanding of what a family tree is supposed to be.
Let me clarify, I also work for a company that has (as one of its products) a family tree in its portfolio, and we have been struggling w...
Building a minimal plugin architecture in Python
...ns are active, but that's a nice-to-have.
Of course, any requirement that comes along saying "I don't need [big, complicated thing] X; I just want something lightweight" runs the risk of re-implementing X one discovered requirement at a time. But that's not to say you can't have some fun doing it a...
What's the best way to parse command line arguments? [closed]
...iest , tersest , and most flexible method or library for parsing Python command line arguments?
15 Answers
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Loading Backbone and Underscore using RequireJS
...kind of inconsistent with the other libs. This is the best main.js I could come up with that works:
6 Answers
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Django filter queryset __in for *every* item in list
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Summary:
One option is, as suggested by jpic and sgallen in the comments, to add .filter() for each category. Each additional filter adds more joins, which should not be a problem for small set of categories.
There is the aggregation approach. This query would be shorter and perhaps quic...