stl | Clean examples of STL algorithms | 3D Printing library

by zziz C++ Version: Current License: No License

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kandi X-RAY | stl Summary

stl is a C++ library typically used in Modeling, 3D Printing, Example Codes applications. stl has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Purpose of this repository is to introduce and show example usages of C++ STL algorithms. This is a work in progress. Fork, copy, edit, contribute, distribute or do whatever you want. Let's make it a useful repository for everyone!.

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stl has a low active ecosystem.

It has 20 star(s) with 2 fork(s). There are 3 watchers for this library.

It had no major release in the last 6 months.

stl has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of stl is current.

Quality

stl has no bugs reported.

Security

stl has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

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stl does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

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stl releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

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Community Discussions

Trending Discussions on stl

STL and std custom compare arguments working in c++

Does this class satisfy the Allocator requirement?

Problem in using hash tables as the solution to this problem

How to save a VTK render as a .vtk or .stl?

Specifying a concept for an object with a member function that returns a constrained value

function pointer with vector and class

How to pass Comparator to user define Templeted class?

How can I create a vector with a maximum length?

Split wchar_t on size

OpenCV for Android via Visual Studio to Unity

QUESTION

STL and std custom compare arguments working in c++

Asked 2021-Jun-15 at 10:24

I asked this question on stackoverflow STL passing object

I got to know that we pass objects which in tern call the compare operator in them and compare our values and gives us a result. All good.

Now in this piece of code:

...

ANSWER

Answered 2021-Jun-15 at 09:44

Second template parameter of std::set is a type.

You might use function pointer:

Source https://stackoverflow.com/questions/67983806

QUESTION

Does this class satisfy the Allocator requirement?

Asked 2021-Jun-14 at 18:11

I made a custom allocator, but my code didn't compile on msvc and I'm not sure if my implementation satisfies the Allocator requirement (disregarding actual behavior of function implementations here). Here is a minimal example that reproduces the error on Visual Studio (16.11 P1 and 16.10):

...

ANSWER

Answered 2021-Jun-14 at 18:11

It does not.

An allocator rebound to a different value type must be constructible from the original allocator - this is the A a(b) row in the requirements you linked.

Your type fails that requirement.

Source https://stackoverflow.com/questions/67973597

QUESTION

Problem in using hash tables as the solution to this problem

Asked 2021-Jun-14 at 17:27

Andryusha is an orderly boy and likes to keep things in their place.

Today he faced a problem to put his socks in the wardrobe. He has n distinct pairs of socks which are initially in a bag. The pairs are numbered from 1 to n. Andryusha wants to put paired socks together and put them in the wardrobe. He takes the socks one by one from the bag, and for each sock he looks whether the pair of this sock has been already took out of the bag, or not. If not (that means the pair of this sock is still in the bag), he puts the current socks on the table in front of him. Otherwise, he puts both socks from the pair to the wardrobe.

Andryusha remembers the order in which he took the socks from the bag. Can you tell him what is the maximum number of socks that were on the table at the same time? This is the problem.

https://codeforces.com/contest/782/problem/A This is the problem statement.

...

ANSWER

Answered 2021-Jun-14 at 17:10

There are 2*n numbers to read and process, but you processed only n numbers. Process 2*n numbers to fix.

Source https://stackoverflow.com/questions/67974443

QUESTION

How to save a VTK render as a .vtk or .stl?

Asked 2021-Jun-14 at 14:42

I have created a render of a 3D network initially created in Networkx, however now that I have this render I would ultimately like to export it as a single .stl file. From the code below, how would I be able to combine the glyph, tubes, ball into one file. If it is not possible to export to .stl, .vtk would be fine too as it could be converted in Paraview.

...

ANSWER

Answered 2021-Jun-14 at 14:42

VTK has Exporter classes that you can see here: https://vtk.org/doc/nightly/html/classvtkExporter.html

Of those, I'd say OBJ is the closest to STL. You could export your scene to OBJ and then use MeshLab to convert that OBJ to STL. VRML would work too.

Source https://stackoverflow.com/questions/67963814

QUESTION

Specifying a concept for an object with a member function that returns a constrained value

Asked 2021-Jun-14 at 14:21

I am trying to wrap my mind around C++ 20 concept and constraint by porting some of my old code.

...

ANSWER

Answered 2021-Jun-13 at 19:33

A concept is not a type, so it can’t appear as a container element type—neither in the type of an object (this is why you have to use std::vector to approximate std::vector) nor in the type for your concept ContainerOf. Moreover, you can’t use a concept as a template argument, so you can’t have a higher-order ContainerLike concept.

What you can do is make a Container concept that checks only for empty, add the constraint

Source https://stackoverflow.com/questions/67958748

QUESTION

function pointer with vector and class

Asked 2021-Jun-14 at 02:10

In the purpose of my homework, I learned pointer to function and lambda function.
I create a class Rectangle that contain width and length and calculate area. One of the question is to create a class MyVector that is a derived class of stl vector and contain function called func that take in parameter a Boolean function and return true if at least one of the element in the vector is answer to the function otherwise, false will be returned.(I called this boolean function cmp)
In the main, I have to check if at least one rectangle have an area more that 50, if it is the case display all rectangle. I don't know how to use this pointer function very well, so can you help me understand this through my example

Rectangle class:

...

ANSWER

Answered 2021-Jun-14 at 02:10

You'll need to make a few changes to the implementation of func():

Source https://stackoverflow.com/questions/67957135

QUESTION

How to pass Comparator to user define Templeted class?

Asked 2021-Jun-12 at 21:47

I want to create a generalized heap data structure, and facing an issue with passing template comparator.

...

ANSWER

Answered 2021-Mar-17 at 15:53

template
class Comparator{
    bool operator()(const T &a, const T &b){
        ...
        // returns logic
    }
}


template
class AnyClass{

public:
    ...
    void function(){
   //   code ...
        Comp()(obj1, obj2);
    }
    ...

}

Source https://stackoverflow.com/questions/66622754

QUESTION

How can I create a vector with a maximum length?

Asked 2021-Jun-12 at 00:23

I want to create a container that provides all of the same functionality as a std::vector but with the caveat that you cannot add anymore elements once the vector reaches a specified size.

My first thought was to inherit from std::vector and do something like

...

ANSWER

Answered 2021-Jun-12 at 00:23

How can I create a vector with a maximum length?

You cannot do that with std::vector. You can however refrain from inserting any elements after you reach some limit. For example:

Source https://stackoverflow.com/questions/67943916

QUESTION

Split wchar_t on size

Asked 2021-Jun-11 at 05:56

I want split a wchar_t string on size: e.g. wchar_t* t= L"Abcdefghijk" and I want to split on size 4 then the chunks I should get are: {"Abcd", "efgh", "ijk"}

I wrote the following code for doing this, however it has bugs:

...

ANSWER

Answered 2021-Jun-11 at 05:56

Here's a version with a single allocation:

Source https://stackoverflow.com/questions/67915691

QUESTION

OpenCV for Android via Visual Studio to Unity

Asked 2021-Jun-10 at 16:27

I tried to compile a .so library using Visual Studio 2019 along with OpenCV Android in order to use this library in Unity. There are some answers on how to configure Visual Studio to use OpenCV Android (here or here) but none of these work for me. Below you can see my configurations.

Visual Studio 2019 (running on Windows 10)

android-ndk-r21e // also tried with android-ndk-r15c android-ndk-r16b and android-ndk-r17c

OpenCV Android 4.5.2 // also tried with OpenCV Android 4.0.0, 4.0.1 and 4.1.0

My settings in Visual Studio 2019 look as follows:

Configuration Properties

- General

Platform Toolset Clang 5.0 (also tried Clang 3.8 or GCC 4.9)
Configuration Type Dynamic Library (.so)
Target API Level Nougat 7.0 (android-24) (also tried different versions)
Use STL LLVM libc++ static library (c++_static) (also tried "GNU STL static library (gnustl_static)")

C/C++

- General

Additional Include Directories "Path to OpenCV_4_5_2_Android\sdk\native\jni\include"
Code Generation Enable C++ Exceptions "Yes(-fexceptions)"
Language C++17(-std=c++1z)
Precompiled Headers Not using Precompiled Headers

Linker

- General

Additional Library Directories Path to OpenCV_4_5_2_Android\sdk\native\libs\armeabi-v7a

- Input

Additional Dependencies Path to OpenCV_4_5_2_Android\sdk\native\libs\armeabi-v7a\libopencv_java4.so

My Source.cpp I try to compile is just a single function for testing purposes

...

ANSWER

Answered 2021-Jun-10 at 16:27

I had the exact same issue as you (though I used c++ 11) with the exact same setup, and struggled for days. I believe the errors you're seeing (like me) are from arm_neon.h. Very oddly, I was able to just build (not run) the .so successfully, even with those errors (I say "errors" because if you look at arm_neon.h, others pop up), so try it. Maybe it's some kind of IntelliJ/Intellisense mistake more than anything else where it's catching false negatives from some other toolchain setup.

At the same time, I'm not 100% sure I was always able to build with that issue, so try these steps as well if you can't:

use OpenCV 4.0.1 with Android NDK 16rb. The NDK matters when it comes to OpenCV builds, and this is the only supposed match that I know of.
follow this tutorial from scratch: https://amin-ahmadi.com/2019/06/03/how-to-use-opencv-in-unity-for-android/
if the downloaded OpenCV android SDK is still giving trouble, build OpenCV from the source using his other tutorial here: https://amin-ahmadi.com/2019/02/03/how-to-build-opencv-4-x-for-native-android-development/ and then repeat step 2.

MAJOR EDIT: OpenCV 4.5.2 needs to be treated differently because it no longer uses toolchains with gnu c++. -When you build OpenCV from CMake, build with Android NDK 21e, and do not use the toolchain in OpenCV 4.5.2. Use the one inside the Android NDK's build folder (android-ndk-r21e\build\cmake). -When you build your .so from Visual Studio 2019, do not use the GNU STL, use the LLVM. GNU c++ is no longer part of Android NDKs, and you need to cut it out of the process entirely. -In the Linker Input, put the names of your library files (or file, if it's just the world one) in the Library Dependencies field, not the Additional Dependencies field. -Everything else is the same as in those common tutorials.

Source https://stackoverflow.com/questions/67777653

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