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Difference between a theta join, equijoin and natural join
... created by various vendors such as Microsoft's SQL Server, Oracle's MySQL etc. ) don't even bother supporting this, it is just bad practice (or purposely chose not to implement it). Imagine that a developer comes and changes the name of the second column in Product from Price to Cost. Then all the ...
std::back_inserter for a std::set?
...proposal to have a "single argument inserter iterator".
https://isocpp.org/files/papers/p0471r0.html . I couldn't find if it the proposal advanced. I think it makes sense.
For now you can have this behavior defining the maker function:
template<class Container>
auto sinserter(Container& ...
how to generate migration to make references polymorphic
...lves if you need them. You can just add indexes as normal in the migration file to imageable_type and/or imageable_id as necessary.
– Michelle Tilley
Apr 20 '14 at 18:23
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Group By Multiple Columns
...ry helpful. I find the use of an aggregate function (i.e., MAX, MIN, SUM, etc.) side-by-side with grouping to be a common scenario.
– barrypicker
Jan 24 '14 at 18:44
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What is the difference between gmake and make?
...s pmake(1). This can lead to disastrous results when trying to write a Makefile that can be used by both GNU Make and pmake (contrived harmless example, imagine: gcc -o $@ $< = no input sources with gmake because $< evaluates to an empty string. Worse combinations exist that can result in gcc ...
Listing and deleting Git commits that are under no branch (dangling?)
...re is the gist:
git gcremoves unreachable objects (commits, trees, blobs (files)). An object is unreachable if it isn't part of the history of some branch. Actually it is a bit more complicated:
git gc does some other things but they are not relevant here and not dangerous.
Unreachable objects th...
Is SonarQube Replacement for Checkstyle, PMD, FindBugs?
...anything easily.
The statistics it offers are very detailed (lines of code etc).
And it even offers great support for test coverage etc :)
Here you can take a good look:
http://nemo.sonarsource.org/
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Why does writeObject throw java.io.NotSerializableException and how do I fix it?
...s- e.g (new Atom()). The problem is not only that I need them written to a file, but that the user may want to remove or edit current objects. I think I will try some XML-based serialization, but I am quite new to the concept and it's a bit hard for me yet. Thank you
– Mihai Bu...
Get day of week in SQL Server 2005/2008
... date 01/01/2009, I want to find out what day it was e.g. Monday, Tuesday, etc...
10 Answers
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load and execute order of scripts
...age until the script has been loaded and executed.
To test this fact:
// file: test.php
sleep(10);
die("alert('Done!');");
// HTML file:
<script type="text/javascript" src="test.php"></script>
Dynamically added scripts are executed as soon as they are appended to the document.
To t...