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mysql -> insert into tbl (select from another table) and some default values [duplicate]
As the title says, I am trying to insert into one table selecting values from another table and some default values.
5 Ans...
Event system in Python
...trying to keep an overview of the above packages, plus the techniques mentioned in the answers here.
First, some terminology...
Observer pattern
The most basic style of event system is the 'bag of handler methods', which is a
simple implementation of the Observer pattern.
Basically, the handler meth...
When to use references vs. pointers
...der to read when there's no indication of what's happening, why should add_one(a) not return the result, rather than set it by reference?
– connec
Aug 14 '11 at 18:21
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psql: FATAL: Ident authentication failed for user “postgres”
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one command restart postgresql: /etc/init.d/postgresql restart
– Tyler Long
Nov 23 '11 at 2:44
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PEP 8, why no spaces around '=' in keyword argument or a default parameter value?
...arameters tend to go in the same line whereas assignments usually are each one in their own line, so saving space is likely to be an important matter there.
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How to convert std::string to LPCSTR?
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The MultiByteToWideChar answer that Charles Bailey gave is the correct one. Because LPCWSTR is just a typedef for const WCHAR*, widestr in the example code there can be used wherever a LPWSTR is expected or where a LPCWSTR is expected.
One minor tweak would be to use std::vector<WCHAR> in...
How do I get the currently displayed fragment?
...y code to iteratively check each of my fragments, and find out the visible one ...
– Leem.fin
Feb 15 '12 at 14:23
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What is The Rule of Three?
...t does not take into account what name pointed to before the assignment,
sooner or later you will get memory leaks all over the place.
Explicit definitions
Since memberwise copying does not have the desired effect, we must define the copy constructor and the copy assignment operator explicitly to m...
Get array of object's keys
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So how did one do this before ES5?
– Andrew S
Sep 10 '18 at 13:51
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Do you put unit tests in same project or another project?
...o a separate project requires only a small amount of effort, and that is a one time cost. I am very comfortable with the conclusion that unit tests shouldn't be shipped.
– Jason Jackson
Mar 18 '10 at 23:22
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