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Image fingerprint to compare similarity of many images
...mage - and can be implemented quite efficiently. Subtracting one histogram from another will produce a new historgram which you can process to decide how similar two images are. Histograms, because the only evaluate the distribution and occurrence of luminosity/color information handle affine transf...
Which commit has this blob?
... of the blob. A prefix, even if unique, will not work. To get the full SHA from a prefix, you can use git rev-parse --verify $theprefix
– John Douthat
Aug 2 '11 at 23:05
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Hidden Features of PHP? [closed]
...s sounds like a point-whoring question but let me explain where I'm coming from.
78 Answers
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Scala type programming resources
...l programming: "object-oriented" and "functional". Most examples linked to from here follow the object-oriented paradigm.
A good, fairly simple example of type-level programming in the object-oriented paradigm can be found in apocalisp's implementation of the lambda calculus, replicated here:
// A...
How does UTF-8 “variable-width encoding” work?
...ti-byte code point. Like this:
0xxx xxxx A single-byte US-ASCII code (from the first 127 characters)
The multi-byte code-points each start with a few bits that essentially say "hey, you need to also read the next byte (or two, or three) to figure out what I am." They are:
110x xxxx One m...
SparseArray vs HashMap
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//but can be copied from Android source code
In terms of memory, here is an example of SparseIntArray vs HashMap<Integer, Integer> for 1000 elements:
SparseIntArray:
class SparseIntArray {
int[] keys;
int[] values;
int si...
What's the difference between a 302 and a 307 redirect?
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So, from a parser/agent/browser perspective, we can simply treat 302 and 307 as identical right? (The exact same piece of code can be used to handle both cases without further distinguishment?)
– Pacerier
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How can I use tabs for indentation in IntelliJ IDEA?
...Indents > To Tabs
To convert tabs to spaces, you can chose "To Spaces" from the same place.
For all files
The paths in the other answers were changed a little:
File > Settings... > Editor > Code Style > Java > Tabs and Indents > Use tab character
File > Other Settings ...
Does Java SE 8 have Pairs or Tuples?
...eems like it can be solved without using any kind of Pair structure. [Note from OP: here is the other correct answer.]
The short answer is no. You either have to roll your own or bring in one of the several libraries that implements it.
Having a Pair class in Java SE was proposed and rejected at...
Get type of a generic parameter in Java with reflection
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I want to try to break down the answer from @DerMike to explain:
First, type erasure does not mean that the JDK eliminates type information at runtime. It's a method for allowing compile-time type checking and runtime type compatibility to coexist in the same la...