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计算统计特征（正态分布）函数及实例 - C/C++ - 清泛网 - 专注C/C++及内核技术
... <map>
int _tmain(int argc, _TCHAR* argv[])
{
std::map<int, int> map_test;
map_test[0] = 100;
map_test[5] = 80;
map_test[2] = 10;
map_test[8] = 99;
map_test[4] = 102;
StdevInfo stdev_info;
stdev_info.init();
stdev_info.caculate_stdev_info(map_test.begin(), map_test.end(),
...
Test if lists share any items in python
...
Short answer: use not set(a).isdisjoint(b), it's generally the fastest.
There are four common ways to test if two lists a and b share any items. The first option is to convert both to sets and check their intersection, as such:
bool(set(a) & set(b))
Because sets are stored using a h...
JavaScript open in a new window, not tab
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After some more testing, it seems almost any parameters―as long as there is at least one―will open a new window instead of a tab. For example just "top=0" even works in FF 31 and Chrome 36. This is on OpenBSD using the cwm window manager...
Is 'switch' faster than 'if'?
...-- note that the compiler in practice would need to insert some form of if test around the table to ensure that the input was valid in the table. Note also that it only works in the specific case that the input is a run of consecutive numbers.
If the number of branches in a switch is extremely larg...
Vertically centering a div inside another div [duplicate]
...gest that you use one of the more modern solutions.
Here is an example
Tested in:
FF3.5+
FF4+
Safari 5+
Chrome 11+
IE9+
HTML
<div class="cn"><div class="inner">your content</div></div>
CSS
.cn {
display: table-cell;
width: 500px;
height: 500px;
vertical...
How do I get a human-readable file size in bytes abbreviation using .NET?
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using Log to solve the problem....
static String BytesToString(long byteCount)
{
string[] suf = { "B", "KB", "MB", "GB", "TB", "PB", "EB" }; //Longs run out around EB
if (byteCount == 0)
return "0" + suf[0];
long bytes = Math.Abs(byteCount);
int place ...
How do you get a list of the names of all files present in a directory in Node.js?
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You can use the fs.readdir or fs.readdirSync methods.
fs.readdir
const testFolder = './tests/';
const fs = require('fs');
fs.readdir(testFolder, (err, files) => {
files.forEach(file => {
console.log(file);
});
});
fs.readdirSync
const testFolder = './tests/';
const fs = require...
Visual Studio 64 bit?
...ke-advantage-of-64-bit
Secondly, from a cost perspective, probably the shortest path to
porting Visual Studio to 64 bit is to port most of it to managed code
incrementally and then port the rest. The cost of a full port of that
much native code is going to be quite high and of course all known
exte...
How to forward declare a template class in namespace std?
...s reserved for use by the implementation, so you should use something like TEST_H instead of __TEST__. It's not going to generate a warning or an error, but if your program has a clash with an implementation-defined identifier, then it's not guaranteed to compile or run correctly: it's ill-formed. A...
Virtual Serial Port for Linux
I need to test a serial port application on Linux, however, my test machine only has one serial port.
8 Answers
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