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Difference between a theta join, equijoin and natural join
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A theta join allows for arbitrary comparison relationships (such as ≥).
An equijoin is a theta join using the equality operator.
A natural join is an equijoin on attributes that have the same name in each relationship.
Additionally,...
Purpose of Unions in C and C++
...t that the structure members be placed without arbitrary padding. If code tests for structure-member placement or structure size, code should work if accesses are done directly through the union, but a strict reading of the Standard would indicate that taking the address of a union or struct member...
How do you create a static class in C++?
... GCC supports -fno-access-control, which can be used in whitebox unit tests to access otherwise private class members. That's about the only reason I can think of to justify using a class member instead of an anonymous/static global in the implementation.
– Tom
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HTTP authentication logout via PHP
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This does not work as it is explained. Tested in Chrome 40 and Firefox 35.
– funforums
Feb 26 '15 at 15:16
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Comparing date part only without comparing time in JavaScript
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Please be aware that testing by date1 === date2 does not seem to provide consistent behaviour; it's better to do date1.valueOf() === b.valueOf() or even date1.getTime() === date2.getTime(). Strangeness.
– Erwin Wessels
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Print all properties of a Python Class [duplicate]
...rint for example in order of declaration, and you do not want to do it manually, check this
– Matteo A
Aug 14 '15 at 8:41
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Which version of PostgreSQL am I running?
...It will return server version as an integer. This is how server version is tested in PostgreSQL source, e.g.:
/*
* This is a C code from pg_dump source.
* It will do something if PostgreSQL remote version (server) is lower than 9.1.0
*/
if (fout->remoteVersion < 90100)
/*
* Do som...
Keyboard shortcuts with jQuery
...text/javascript">
$(document).ready(function(){
$("#test").keypress(function(e){
if (e.which == 103)
{
alert('g');
};
});
});
</script>
<input type="text" id="test" />...
design a stack such that getMinimum( ) should be O(1)
...r equal".
EDIT: Here's an implementation of Pete's evil scheme. I haven't tested it thoroughly, but I think it's okay :)
using System.Collections.Generic;
public class FastMinStack<T>
{
private readonly Stack<T> stack = new Stack<T>();
// Could pass this in to the constr...
Sending files using POST with HttpURLConnection
...erty("User-Agent", "CodeJava Agent");
httpConn.setRequestProperty("Test", "Bonjour");
outputStream = httpConn.getOutputStream();
writer = new PrintWriter(new OutputStreamWriter(outputStream, charset),
true);
}
/**
* Adds a form field to the reque...