Liblas Study Notes 2-build grid indexes and liblas Study Notes
The main code file is index. hpp index. cpp.
Index. hpp defines several macros
// Maximum memory limit. The default value is 10 MB.
# Define LIBLAS_INDEX_MAXMEMDEFAULT 10000000 // 10 megs default
// Minimum Memory, 1 MB by default
# Define LIBLAS_INDEX_MINMEMDEFAULT 1000000 // 1 meg at least has to be allowed
// Maximum number of grids, up to 0.
program and will create additional threads to process logs. However, it will be slower and the memory consumption will increase. It is generally recommended that the latter be used first.
Construct parameters with keywords
Here we can see a concept: keywords. There are 27 hpp files in the boost/log/keywords/directory:
auto_flush.hpp facility.hpp ident.hpp log_source.hpp open_mode.hpp rotation_size.hpp target.hppchannel.hpp
project step by step to ensure that no error is reported. Step 1: Download the source code. Link: examples-> Frameworks-> Unrar4iOS. framework, drag them into your project and select copy, as shown in:
If ARC is enabled for your project, an error may be reported. Delete autorelease.
If you run it again, an error is returned because raros. hpp and dll. the header file of hpp is included in the framework. Th
Boost: When the bind constructor object is used, the real parameter transmission adopts the value passing method, and will be constructed several times in the middle. If the copy construction is not allowed or the copy construction has a high performance overhead, you can use boost: ref to add a wrapper layer to avoid copy construction. The following is the sample code:
# Include # Include "boost/bind. hpp"# Include "boost/ref.
deep into the C ++ standard library hd pdf Version Download:
# Include "stdcpp. hpp"
# Include
Using namespace boost;
Int main ()
{
Timer t;
Cout
Cout
Cout
Return EXIT_SUCCESS;
}
Program output:
Max timespan: 0.596523 h
Min timespan: 1e-06s
Now time elapsed: 0 s
Ubuntu compilation and installation of boost and use it in eclipse C/C ++
----------------------------------- Split line -----------------------------------
I also installed boost in
Bind-boost
Header file: boost/Bind. HPP
BindIs a set of overloaded function templates.Used to bind certain parameters to a function (or function object.The return value of BIND is a function object.
Its source file is too long. You can't see it. Here we only write down its usage:
9.1 for common functions
Assume that the function fun () is as follows:Void fun (int x, int y){Cout }Now let's look at how to bind parameters to bind them.For commo
This program reads the content from the terminal and then runs according to the Lua block. # Include Compilation error: Lua. H: No file or directoryLocate Lua. h does not have the corresponding header file under the corresponding include directory. You need to download and install liblua5.2-Dev, and then sudo updatedb; locate Lua. H will find it./Home/vonzhou/redis-2.6/deps/Lua/doc/lua.html/Home/vonzhou/redis-2.6/deps/Lua/etc/Lua. HPP/Home/vonz
Histogram equalization can enhance the contrast of an image !!!
# Include "opencv2/highgui. HPP "# include" opencv2/imgproc. HPP "# include ProgramWaitkey (0); Return 0 ;}
.
Lexical_cast is not limited to conversions between string and numeric types. It can be converted between any type that can be output to stringstream or any type that can be input from stringstream. Timer
Boost provides the Timer class for timing, and the timer Time Report class progress_timer and progress bar display class progress_display.
The timer class is included in the boost/Timer. HPP header file, and the progress_timer and progress_displ
ignored.
That's simple. If you already have a ready-made class and you have no right to modify it, how can you add it to Lua? The answer is to inherit it and add the derived class to Lua.
Conclusion
Luawrapper needs boost library support: boost/type_traits.hpp, boost/function. HPP, boost/bind. HPP, which uses the C ++ template for some specific features. Therefore, if the C ++ compiler does not support thi
checking the code, I found that I customized an inline function in Class:
inline float MIN(float a, float b, float c, float d){float t1,t2;t1 = a
The imgproc. HPP and highgui. HPP contained in Class B have the following statements:
#include "opencv2/core/core.hpp"#include "opencv2/imgproc/types_c.h"In types_c.h, I found:
#ifndef MIN# define MIN(a,b) ((a) > (b) ? (b) : (a))#endifTherefore, the cause
Webgraph is a good tool for storing and expressing web graphs. Currently, it provides Java, C ++, and other Java interfaces. In the past, I have been using the Java version, but an unknown error occurred when I recently used Java to compress a large Web Graph (over 60 GB. Therefore, I want to use the C ++ version for a try. We have also used the C ++ version of webgraph before, but it has never been built successfully. This time, after hard work, the build was successful. The detailed process is
Noncopyable
Header file:
"Boost/utility. HPP"
Generally, compilers are good friends of programmers, but they are not always. One of its advantages is that it will automatically provide us with a copy constructor and a value assignment operator, if we decide not to do it ourselves. This may also lead to unpleasant surprises if the class itself does not want to be copied (or assigned a value ). In this case, we need to explicitly tell the users of this
have made some achievements in C ++ programming and have a general understanding of classes, objects, and namespaces, you must first add the corresponding header files to use opencv functions. We add core. HPP and highgui. HPP and reference the CV namespace.1.1 open an existing image
In opencv 2 + versions, the image storage type is mat. The function for loading the image is imread, and the function for di
Use a macro to define cuda_kernel_loop.
In common. HPP.
# DefineCuda_kernel_loop (I, n )\
For(IntI = blockidx. x * blockdim. x + threadidx. X ;\
I
I + = blockdim. x * griddim. X)
First, let's look at the design of the dimensions of the threads and thread blocks obtained by caffe pipeline,
We can also see from common. HPP
Caffe_cuda_num_threads
Caffe_get_blocks(ConstIntN)
It is obviously one-dimensional.
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>_
1 # include "opencv2/imgproc. HPP "2 # include" opencv2/highgui. HPP "3 4 # include
[Opencv] 2. Edge Detection
The main function of the split function is to divide a color image into three channels to facilitate further image processing. The details are as follows:
Split divides a multi-channel array into several single-channel arrays.C ++: void split (const mat CTX, mat * mV)C ++: void split (const mat CTX, vector mv)
In fact, there is also a function merge that can implement the opposite operation, the simple description is as follows:
Merge composes a multi-channel array from several single-channel
-- without-MPI -- without-Python -- without-serialization -- without-wave -- stagedir = "E: \ SDK \ boost \ bin \ vc9 "link = static runtime-link = shared runtime-link = static threading = multiDebug releaseThe following describes the meaning of each parameter in detail:
Stage/install:Stage indicates that only the library (DLL and Lib) is generated. Install also generates the include directory containing the header file. I recommend using stage, because the include directory generated by instal
"Preface" What Is HPP?Hybirdapp for short, details see: hpp--Let all small and medium-sized enterprises have their own appsThe plain thing is to use HTML+CSS+JS to develop apps, including iOS and Android versions.HbuilderMore specific implementation methods, self-Baidu bar, not a narrative,Previously recommended Hbuilder+mui+nativejs that set, related information:How to quickly develop a high-quality app--e
is a C language file and the others are C + + files.Srcexts =. C. C. cc. cpp. CPP. C + +. Cxx. CP# header File TypeHdrexts =. H. H. HH. hpp. HPP h++. hxx. HP# pre-compiler and compiler options# users can override these variables in the command line UCFLAGS =# cxxflags=-std=c++0xcxxflags=# C Program CompilerCC = gcc# C + + program compilerCXX = g++# Uncomment the following line, C program will be compiled a
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