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Why does changing 0.1f to 0 slow down performance by 10x?
... (or subnormal) numbers are kind of a hack to get some extra values very close to zero out of the floating point representation. Operations on denormalized floating-point can be tens to hundreds of times slower than on normalized floating-point. This is because many processors can't handle them dire...
Python Charts库(Highcharts API的封装) - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...制xy轴的设置
在一个例子
series = [
{
'name': 'OS X',
'data': [11,2,3,4],
'type': 'line',
'y':5
}, {
'name': 'Ubuntu',
'data': [8,5,6,7],
'type': 'line',
'color':'#ff0066'
}, {
'name': 'Windows',
'data': [12,6,7,2],
'type...
Sending files using POST with HttpURLConnection
...example on how to send a bitmap "file" (actually an in-memory stream) via POST to an Apache HTTP server. I'm not interested in cookies or authentication or anything complicated, but I just want to have a reliable and logic implementation. All the examples that I've seen around here look more like "l...
Difference between sh and bash
...or the Shell Command Language) is a programming language described by the POSIX
standard.
It has many implementations (ksh88, dash, ...). bash can also be
considered an implementation of sh (see below).
Because sh is a specification, not an implementation, /bin/sh is a symlink
(or a hard link) to a...
Adding the “Clear” Button to an iPhone UITextField
...n attribute for adding this sub-control in Interface Builder in the iPhone OS 2.2 SDK.
10 Answers
...
How do you get an iPhone's device name
... Be careful: the tutorial at that link, while quite useful, is aimed at OS 2.2, and uses some methods that are deprecated in 3.0.
– Tim
Jul 8 '09 at 19:49
...
Optional Parameters with C++ Macros
Is there some way of getting optional parameters with C++ Macros? Some sort of overloading would be nice too.
14 Answers
...
Android RoundRectShape圆角矩形使用详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...;
import android.graphics.drawable.shapes.RoundRectShape;
import android.os.Bundle;
import android.view.Menu;
import android.widget.TextView;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState)...
Can local storage ever be considered secure? [closed]
...ion, local script injection, browser cache poisoning, and DNS redirects. Those attacks only work if the user uses the machine after it has been compromised. Nevertheless, physical access in such a scenario means you have bigger problems.
So keep in mind that the limited scenario where local crypto ...
How to unzip a list of tuples into individual lists? [duplicate]
... function, so zip() pairs up 1 with 3 with 8 first, then 2 with 4 and 9. Those happen to correspond nicely with the columns, or the transposition of l.
zip() produces tuples; if you must have mutable list objects, just map() the tuples to lists or use a list comprehension to produce a list of lists...