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How to find out what type of a Mat object is with Mat::type() in OpenCV
... you can call it like so:
string ty = type2str( M.type() );
printf("Matrix: %s %dx%d \n", ty.c_str(), M.cols, M.rows );
Will output data such as:
Matrix: 8UC3 640x480
Matrix: 64FC1 3x2
Its worth noting that there are also Matrix methods Mat::depth() and Mat::channels(). This function is jus...
Passing an array by reference
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It's a syntax for array references - you need to use (&array) to clarify to the compiler that you want a reference to an array, rather than the (invalid) array of references int & array[100];.
EDIT: Some clarification.
void fo...
How to round a number to n decimal places in Java
...hod - i.e. if the decimal to be rounded is 5, it always rounds up to the next number. This is the standard method of rounding most people expect in most situations.
...
What is difference between functional and imperative programming languages?
...ese statements are said to change the state of the program as each one is executed in turn.
Examples:
Java is an imperative language. For example, a program can be created to add a series of numbers:
int total = 0;
int number1 = 5;
int number2 = 10;
int number3 = 15;
total = number1 + number2...
What's wrong with overridable method calls in constructors?
...tion performed by the subclass constructor, the method will not behave as expected.
Here's an example to illustrate:
public class ConstructorCallsOverride {
public static void main(String[] args) {
abstract class Base {
Base() {
overrideMe();
}...
C语言结构体里的成员数组和指针 - C/C++ - 清泛网 - 专注C/C++及内核技术
...你把14行的printf语句改成：
1
printf("%x\n", f.a->s);
你会看到程序不crash了。程序输出：4。 这下你知道了，访问0x4的内存地址，不crash才怪。于是，你一定会有如下的问题：
1）为什么不是 13行if语...
Why is “if not someobj:” better than “if someobj == None:” in Python?
I've seen several examples of code like this:
9 Answers
9
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How can you find the height of text on an HTML canvas?
The spec has a context.measureText(text) function that will tell you how much width it would require to print that text, but I can't find a way to find out how tall it is. I know it's based on the font, but I don't know to convert a font string to a text height.
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Do I need to convert .CER to .CRT for Apache SSL certificates? If so, how?
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File extensions for cryptographic certificates aren't really as standardized as you'd expect. Windows by default treats double-clicking a .crt file as a request to import the certificate into the Windows Root Certificate store, but...
Apache is downloading php files instead of displaying them
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The correct AddType for php is application/x-httpd-php
AddType application/x-httpd-php .php
AddType application/x-httpd-php-source .phps
Also make sure your php module is loaded
LoadModule php5_module modules/mod_php55.so
When you're configurin...