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How to find if a given key exists in a C++ std::map
I'm trying to check if a given key is in a map and somewhat can't do it:
14 Answers
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Looping in a spiral
A friend was in need of an algorithm that would let him loop through the elements of an NxM matrix (N and M are odd). I came up with a solution, but I wanted to see if my fellow SO'ers could come up with a better solution.
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Add line break to 'git commit -m' from the command line
I am using Git from the command line and am trying to add a line break to the commit message (using git commit -m "" ) without going into Vim.
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线程访问窗口资源的问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
...CWnd::AssertValid()检查，就会遇到断言失败。具体原因在于MFC管理窗口的机制。MFC有个窗口句柄和窗口类对象的映射表，就是Windows对象(句柄)和C++对象的一个映射，它是在窗口调用CWnd::Create()，CWnd::CreateEx()时，就添加到映射表里的...
What does the M stand for in C# Decimal literal notation?
In order to work with decimal data types, I have to do this with variable initialization:
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Converting unix timestamp string to readable date
I have a string representing a unix timestamp (i.e. "1284101485") in Python, and I'd like to convert it to a readable date. When I use time.strftime , I get a TypeError :
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Converting Epoch time into the datetime
I am getting a response from the rest is an Epoch time format like
8 Answers
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Multiple “order by” in LINQ
I have two tables, movies and m>cat m>egories , and I get an ordered list by m>cat m>egoryID first and then by Name .
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Convert one date format into another in PHP
Is there a simple way to convert one date format into another date format in PHP?
15 Answers
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How to sort in-place using the merge sort algorithm?
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Knuth left this as an exercise (Vol 3, 5.2.5). There do exist in-place merge sorts. They must be implemented carefully.
First, naive in-place merge such as described here isn't the right solution. It downgrades the performance to O(N2).
The idea is to sort part of the array while using the res...