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converting Java bitmap to byte array
... to encode bitmap into byte[] and vice versa
public static String encodeTobase64(Bitmap image) {
Bitmap immagex = image;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
immagex.compress(Bitmap.CompressFormat.PNG, 90, baos);
byte[] b = baos.toByteArray();
String imageEn...
Removing packages installed with go get
...ts of standard library archive files!
A complete example, which you could base a script on if you like:
$ go get -u github.com/motemen/gore
$ which gore
/Users/ches/src/go/bin/gore
$ go clean -i -n github.com/motemen/gore...
cd /Users/ches/src/go/src/github.com/motemen/gore
rm -f gore gore.exe g...
Difference between int32, int, int32_t, int8 and int8_t
...t.h header file that essentially leverages similar typedefs.
On a windows based system, you may see entries in stdin.h header file as
typedef signed char int8_t;
typedef signed short int16_t;
typedef signed int int32_t;
typedef unsigned char uint8_t;
There is quite more...
从源代码剖析Mahout推荐引擎 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
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以UserCF的推荐算法为例，官方建议我们的开发过程：
图片摘自Mahout in Action
从上图中我们可以看到，算法是被模块化的，通过1,2,3,4的过程进行方法调用。
程序代码：
public class UserCF {
final static int NEIGHBORHOOD_NUM = 2;
...
Is the sizeof(some pointer) always equal to four?
...he code you have. Also, not all 32 bit architectures – certainly not all based on the x86 – use a flat memory model. See, e.g., tenouk.com/Bufferoverflowc/Bufferoverflow1a.html for some more discussion around this, although, as I said, it’s been a while and I cannot vouch for anything.
...
What's the difference between a single precision and double precision floating point operation?
...antissa will always be in the form
0.α1α2...αt × βp
where β is the base of representation. But since the fraction is a binary number, α1 will always be equal to 1, thus the fraction can be rewritten as 1.α2α3...αt+1 × 2p and the initial 1 can be implicitly assumed, making room for an ex...
ASP.NET MVC on IIS 7.5
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This was my problem too. I never would have guessed based on the 403 symptom that my application was missing the Global.asax
– Saul Dolgin
Jun 28 '13 at 13:09
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Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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How to JSON serialize sets?
...de disappeared
updated the call to the parents' default with super()
using base64 to serialize the bytes type into str (because it seems that bytes in python 3 can't be converted to JSON)
from decimal import Decimal
from base64 import b64encode, b64decode
from json import dumps, loads, JSONEncoder...
convert UIImage to NSData
...{
UIImage *snapshot = self.myImageView.image;
[self encodeImageToBase64String:snapshot];
}
call this method for image convert in base 64
-(NSString *)encodeImageToBase64String:(UIImage *)image
{
return [UIImagePNGRepresentation(image) base64EncodedStringWithOptions:N...