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How do I provide custom cast support for my class?
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You would need to override the conversion operator, using either implicit or explicit depending on whether you want users to have to cast it or whether you want it to happen automagically. Generally, one direction will always work, that's where you use implicit, and the other directi...
How to elegantly ignore some return values of a MATLAB function?
Is it possible to get the 'nth' return value from a function without having to create dummy variables for all n-1 return values before it?
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Is there a way to make npm install (the command) to work behind proxy?
Read about a proxy variable in a .npmrc file but it does not work. Trying to avoid manually downloading all require packages and installing.
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What is the fastest way to compute sin and cos together?
...ns simultaneously. If you need strong optimization, perhaps you should use it.
Here is a small example: http://home.broadpark.no/~alein/fsincos.html
Here is another example (for MSVC): http://www.codeguru.com/forum/showthread.php?t=328669
Here is yet another example (with gcc): http://www.allegro...
Impossible to Install PG gem on my mac with Mavericks
I'm trying to install the pg gem in order to work again with my rails projects. But I get this error:
26 Answers
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Converting from IEnumerable to List [duplicate]
...follow
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edited Sep 7 '18 at 20:14
jpaugh
5,44044 gold badges3232 silver badges7979 bronze badges
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IN clause and placeholders
I'm attempting to do the following SQL query within Android:
9 Answers
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How do you delete an ActiveRecord object?
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It's destroy and destroy_all methods, like
user.destroy
User.find(15).destroy
User.destroy(15)
User.where(age: 20).destroy_all
User.destroy_all(age: 20)
Alternatively you can use delete and delete_all which won't enforce :...
How to make an HTTP POST web request
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Available in: .NET Framework 4.5+, .NET Standard 1.1+, .NET Core 1.0+ .
It is currently the preferred approach, and is asynchronous and high performance. Use the built-in version in most cases, but for very old platforms there is a NuGet package.
using System.Net.Http;
Setup
It is recommended...
stl multimap用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...以重复的。声明multimap<int, CString>mapTest;multimap<int, CString>::itera...multimap的特点为key是可以重复的，而普通map中的key是不可以重复的。
声明
multimap<int, CString>mapTest;
multimap<int, CString>::iterator pIter;
typedef multimap<int, C...