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What does it mean for a data structure to be “intrusive”?
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An intrusive data structure is one that requires help from the elements it intends to store in order to store them.
Let me reword that. When you put something into that data structure, that "something" becomes aware of the fact that it is in that data str...
java get file size efficiently
...llowed by channel. I run this with some pause fresh about 10 times. So for one time access, using the URL is the fastest way I can think of:
LENGTH sum: 10626, per Iteration: 10626.0
CHANNEL sum: 5535, per Iteration: 5535.0
URL sum: 660, per Iteration: 660.0
For runs = 5 and iterations = 50 the...
The type or namespace name could not be found [duplicate]
I have a C# solution with several projects in Visual Studio 2010 .
One is a test project (I'll call it " PrjTest "), the other is a Windows Forms Application project (I'll call it " PrjForm "). There is also a third project referenced by PrjForm, which it is able to reference and use successfu...
Default profile in Spring 3.1
... beans annotated with @Profile("prod") and @Profile("demo") .
The first one, as you can guess :), is used on beans that connect to production DB and second one annotates beans that use some fake DB ( HashMap or whatever)- to make development faster.
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git undo all uncommitted or unsaved changes
...clean -fdx
WARNING: -x will also remove all ignored files, including ones specified by .gitignore! You may want to use -n for preview of files to be deleted.
To sum it up: executing commands below is basically equivalent to fresh git clone from original source (but it does not re-download...
How do you sign a Certificate Signing Request with your Certification Authority?
... (a.k.a server or user). Both of the two commands elide the two steps into one. And both assume you have a an OpenSSL configuration file already setup for both CAs and Server (end entity) certificates.
First, create a basic configuration file:
$ touch openssl-ca.cnf
Then, add the following to ...
How can I compare two lists in python and return matches
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Not the most efficient one, but by far the most obvious way to do it is:
>>> a = [1, 2, 3, 4, 5]
>>> b = [9, 8, 7, 6, 5]
>>> set(a) & set(b)
{5}
if order is significant you can do it with list comprehensions like t...
Good ways to manage a changelog using git?
...re searchers, it's now possible to generate gorgeous logs with:
git log --oneline --decorate
Or, if you want it even prettier (with color for terminal):
git log --oneline --decorate --color
Piping that output to ChangeLog is what I currently use in all my projects, it's simply amazing.
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What's the difference between a continuation and a callback?
...finally understood at intuition level all continuation-related concepts in one sweep! I new once it clicked, it was going to be simple and i would see i used the pattern many times before unknowingly, and it was just like that. Thanks so much for the wonderful and clear explanation.
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How do I delete a fixed number of rows with sorting in PostgreSQL?
...ort some old MySQL queries to PostgreSQL, but I'm having trouble with this one:
6 Answers
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