object-c-foundation-Array Sorting

system type sorting;Nsarray *goodsnames [Email protected][@ "Computer" @ "iphone" @ "ipad"];Nsarray *sortedarray=[goodsnames sortedarrayusingselector: @selector (compare:)];Custom sortingPerson *p1=[[person alloc]initwithname:@ "Tom" Andage:12

Simple implementation of "C + +" smart pointer auto_ptr

Simple implementation of the "C + +" smart pointer auto_ptr # include using namespace std;template class auto_ptr{public : auto_ptr (_ty *_p = 0): _owns (_ptr! = 0), _ptr (_p) {}auto_ptr (const auto_ptr &p): _owns (p._owns ),

Python mixed programming with C + +

Python calls each other with A/C + + modulePython calls c dynamic-link libraryPython's call to C library is simple, packaged into so without any encapsulation, and then using Python's ctypes call. #include extern "C" { void display

C # talk about dictionary<tkey,tvalue>,sorteddictionary<tkey,tvalue> sort

People who have used dictionary know that when the values in each add do not change their order, they need to be sorted to use SortedDictionary, but SortedDictionary is not ideal, and its default way is only to support positive ordering. , you have

Finding and sorting vector<t*> arrays in C + +

//---------------------------------------------------------------------------#include#pragmaHdrstop#include"Unit1.h"#include#includeusing namespacestd;//---------------------------------------------------------------------------#pragmaPackage (Smart_

C + + Return object value

First look at a question as follows:a Test () { A A1 (2); std::endl; return A1;}A a2 = Test ();For the above code, the next procedure is probably explained.The A1 object is constructed in the test () function, and when returned,

C + + Memory error pooling

1. A heap corruption detected error occurred in the memory of the free application.Heap corruption. When the input exceeds the amount of pre-allocated space, it overwrites a storage area after that space, which is called the heap corruption. This is

C # implements serialization and deserialization of JSON

usingSystem;usingSystem.Collections.Generic;usingSystem.Web.Script.Serialization;usingSystem.Configuration;usingSystem.Runtime.Serialization.Json;usingSystem.Runtime.Serialization;usingSystem.IO;usingSystem.Text;namespacewebapplication1{//method One:

C # encounters which has a higher version than referenced assembly

When C # encounters this hint: which has a higher version than referenced assembly,Indicates that there are different versions of DLLs that have two or more project references.Such as:A project reference log4net version is 2.0;B Project Reference

Use of C # process

private static string Executecmd (String wrokdirectory, String doscommand){string output = string. Empty;if (string. IsNullOrEmpty (wrokdirectory) | | String. IsNullOrEmpty (Doscommand)){return output;}Process process = new process

Subtotal C/C ++ (1), subtotal c

Subtotal C/C ++ (1), subtotal c This article mainly records the following two problems: Here is a brief introduction to my environment: Win7 32-bit, Qt creator 5.4.1 compiler MinGW4.9.2 32bit Debugger: gnu gdb 7.8On the Internet, it is misleading

UILable usage in xcode

UILable usage in xcodeInitialization UILabel * lable = [[UILabel alloc] init]; // initialize lable. frame = CGRectMake (30, 30,200, 50); // you can specify the lable position and size. backgroundColor = [UIColor orangeColor]; // set the lable

C ++ returns the referenced function.

C ++ returns the referenced function. To return a function value by reference, the format of the function definition is as follows:   Type identifier & type name (parameter list and type description) {Function body}   The const statement is as

Poj 2480 Longge & amp; #39; s problem product function property + Euler's Function

Poj 2480 Longge & #39; s problem product function property + Euler's Function Question: Evaluate f (n) = Σ gcd (I, N) 1 Analysis: F (n) is the product number theory proof (f (n) = sigma {1 Code: //poj 2480//sep9/*f(pi^ai) = Φ(pi^ai)+pi*Φ(pi^(ai-1

Poj2594 (minimum path overwrite + floyd)

Poj2594 (minimum path overwrite + floyd)   Question:In a directed graph, there are several connection routes. Ask how many robots can be placed at least to walk through the points on the entire graph. Minimum path coverage. Analysis:At this time,

Principle of hdu3388Coprime binary + rejection

Principle of hdu3388Coprime binary + rejection// Find the numbers of k and n, m// Available based on the Exclusion Principle// The number of numbers in the range of [1, x] that are not in the same quality as n is:// For all prime numbers of n: the

POJ1125 Stockbroker Grapevine multi-Source Shortest Path

POJ1125 Stockbroker Grapevine multi-Source Shortest PathTheme Given a graph, I would like to ask which vertex is used when the shortest distance from a vertex to the shortest of the shortest distance from another vertex? How long does it take?(If

Leetcode 218: The Skyline Problem

Leetcode 218: The Skyline ProblemThe Skyline ProblemTotal Accepted:1071Total Submissions:6525 A city's skyline is the outer contour of the silhouette formed by all the buildings in that city when viewed from a distance. Now suppose you areGiven the

Returns the number of times a number appears in an ordered array using the binary method.

Returns the number of times a number appears in an ordered array using the binary method.1. Problem Description In a given sorted array, find the number of occurrences of the specified number. For example, in the array [1, 2, 3, 4, 4, 4, 4, 6, 8, 9],

Principle of hdu2841Visible Trees rejection

Principle of hdu2841Visible Trees rejection// Given an n * m square, the farmer can only see it from (0, 0 ).// The first grid in a straight line. Ask the farmer to see several grids.// For any coordinate (x, y), the coordinates on the same line are

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