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How to install Boost on Ubuntu
...aptitude search boost
Then paste this into a C++ file called main.cpp:
#include <iostream>
#include <boost/array.hpp>
using namespace std;
int main(){
boost::array<int, 4> arr = {{1,2,3,4}};
cout << "hi" << arr[0];
return 0;
}
Compile like this:
g++ -o s ma...
Bootstrap 3 breakpoints and media queries
...th: 1200px) { ... }
Bootstrap 4 provides source CSS in Sass that you can include via Sass Mixins:
@include media-breakpoint-up(xs) { ... }
@include media-breakpoint-up(sm) { ... }
@include media-breakpoint-up(md) { ... }
@include media-breakpoint-up(lg) { ... }
@include media-breakpoint-up(xl) { ...
When to use valueChangeListener or f:ajax listener?
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In C++, is it still bad practice to return a vector from a function?
...closed, I had ~15GB available when running the test).
Here is the code:
#include <chrono>
#include <iomanip>
#include <iostream>
#include <numeric>
#include <vector>
class Timer {
using clock = std::chrono::steady_clock;
using seconds = std::chrono::duration&...
Why is the Android emulator so slow? How can we speed up the Android emulator? [closed]
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Good write-up. If you're looking for docs from Google (includes a few differences for Mac), they can be found here: developer.android.com/tools/devices/emulator.html#accel-vm
– Todd Price
Feb 7 '13 at 3:11
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Java Delegates?
...Java Language
Specification and amended by the Inner Classes Specification included
in the documentation for the JDKTM 1.1 software.
It is unlikely that the Java programming language will ever include
this construct. Sun already carefully considered adopting it in 1996,
to the extent of building and...
C++实现句柄多版本过期置old的思路 - C/C++ - 清泛网 - 专注C/C++及内核技术
C++实现句柄多版本过期置old的思路使用MVCC可以解决。轻量级的不使用MVCC的话，思路如下：核心ObjPtrmap<id, ObjPtr> map_;Get的时候返回最新的ObjPtr；当ObjPtr有新版本要更新的时候，将map中对应id的ObjPtr中is 使用MVCC可以解决。
轻量...
Django migration strategy for renaming a model and relationship fields
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For Django 1.10, I managed to change two model class names (including a ForeignKey, and with data) by simply running Makemigrations, and then Migrate for the app. For the Makemigrations step, I had to confirm that I wanted to change the table names. Migrate changed the names of the ...