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Create a GUID in Java
...erate many millions of such values in your app and still sleep well. Using one of the other variants further reduces the possibility of collisions even closer to zero because of using "space and time", [1] MAC address or name, and [2] current date-time, as constraints.
– Basil ...
Creating an R dataframe row-by-row
I would like to construct a dataframe row-by-row in R. I've done some searching, and all I came up with is the suggestion to create an empty list, keep a list index scalar, then each time add to the list a single-row dataframe and advance the list index by one. Finally, do.call(rbind,) on the list...
How to deploy an ASP.NET Application with zero downtime
...t it services existing sessions for a given server, but doesn't accept new ones. That allows you to avoid dropping sessions. This technique however requires waiting for the sessions to end, and in general you'll want to script this.
– user41871
Oct 7 '09 at 4:1...
How do you test private methods with NUnit?
...testing is not about the class, it's about the code. If I had a class with one public method, and ten private ones used to create the result of the public one, I have no way of ensuring each private method works in the intended way. I could try to create test cases on the public method that hit the ...
What are some better ways to avoid the do-while(0); hack in C++?
...ot allow local function defintions, you'll have to move that function (the one you're gonna return from) somewhere else, which reduces readability. It might end up with dozens of parameters, then, because having dozens of parameters is a bad thing, you'll decide to wrap them into struct, which will ...
What exactly does a jar file contain?
...However, I got curious to what each class contained and when I try to open one of the classes in the jar file, it tells me that I need a source file.
A jar file is basically a zip file containing .class files and potentially other resources (and metadata about the jar itself). It's hard to compare...
How to convert array values to lowercase in PHP?
...);
}
return $array;
}
$arrays = array ( 1 => 'ONE', 2=> 'TWO', 3 => 'THREE',
'FOUR' => array ('a' => 'Ahmed', 'b' => 'basem',
'c' => 'Continue'),
5=> 'FIVE',
array(...
EF Code First “Invalid column name 'Discriminator'” but no inheritance
...othing special about it. I have many tables in my database similar to that one, but for some reason, this table ended up with a "Discriminator" column on the EF Proxy Class.
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How to convert an iterator to a stream?
...
One way is to create a Spliterator from the Iterator and use that as a basis for your stream:
Iterator<String> sourceIterator = Arrays.asList("A", "B", "C").iterator();
Stream<String> targetStream = StreamSupport....
Use tnsnames.ora in Oracle SQL Developer
...
everyone, Just a little update on this old (but quite helpfull) post : don't try to use a symbolic link on Windows. SQL developper doesn't seem to know how to use it. Made me lose some time. Hope it'll save yours.
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