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What is the usefulness of `enable_shared_from_this`?
...ran across enable_shared_from_this while reading the Boost.Asio examples and after reading the documentation I am still lost for how this should correctly be used. Can someone please give me an example and explanation of when using this class makes sense.
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How to compare objects by multiple fields
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You can implement a Comparator which compares two Person objects, and you can examine as many of the fields as you like. You can put in a variable in your comparator that tells it which field to compare to, although it would probably be simpler to just write multiple comparators.
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How to print struct variables in console?
...poses you have an instance of Project (in 'yourProject')
The article JSON and Go will give more details on how to retrieve the values from a JSON struct.
This Go by example page provides another technique:
type Response2 struct {
Page int `json:"page"`
Fruits []string `json:"fruits"`...
LINQ order by null column where order is ascending and nulls should be last
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This Worked to order fields with values on top and null fields on bottom i used this : orderby p.LowestPrice == null, p.LowestPrice ascending Hope helps someone.
– shaijut
Sep 27 '15 at 11:32
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error: ‘uint16_t’ does not name a type - c++1y / stl - 清泛IT社区，为创新赋能！
#include <stdint.h>   解决。/**
* @file stdint.h
* Copyright 2012, 2013 MinGW.org project
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Softw...
Why do C++ libraries and frameworks never use smart pointers?
...part from the fact that many libraries were written before the advent of standard smart pointers, the biggest reason is probably the lack of a standard C++ Application Binary Interface (ABI).
If you’re writing a header-only library, you can pass around smart pointers and standard containers to yo...
How to determine if a point is in a 2D triangle? [closed]
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In general, the simplest (and quite optimal) algorithm is checking on which side of the half-plane created by the edges the point is.
Here's some high quality info in this topic on GameDev, including performance issues.
And here's some code to get y...
C# Entity-Framework: How can I combine a .Find and .Include on a Model Object?
... .Include(i => i.Category)
.Include(i => i.Brand)
.FistOrDefault(x => x.ItemId == id);
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Efficiently replace all accented characters in a string?
...if you don't like the regex being built every time, here are two solutions and some caveats about each.
Here is one way to do this:
function makeSortString(s) {
if(!makeSortString.translate_re) makeSortString.translate_re = /[öäüÖÄÜ]/g;
var translate = {
"ä": "a", "ö": "o", "ü": "...
mysqldump data only
...sh history (you'll be prompted to enter the password after you run the command).
– Dan
Aug 6 '15 at 10:19
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