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0001 # Hash Set
0002 
0003 [![Build Status](https://travis-ci.org/bbondy/hashset-cpp.svg?branch=master)](https://travis-ci.org/bbondy/hashset-cpp)
0004 
0005 Implements a simple HashSet for strings in environments where you don't have the std lib available.
0006 You should probably not be using this. Instead consider using `hash_set` which is a more generic implementation with templates.
0007 This is only useful for very specific use cases having specific memory layout requirements.
0008 
0009 ## Setup
0010 
0011 ```
0012 npm install --save hashset-cpp
0013 ```
0014 
0015 ## Sample
0016 
0017 ```c++
0018 #include <iostream>
0019 #include "hash_set.h"
0020 #include "test/example_data.h"
0021 
0022 using std::cout;
0023 using std::endl;
0024 
0025 int main(int argc, char **argv) {
0026   // Bucket size is 256 and don't allow multiple items per item hash.
0027   HashSet<ExampleData> set(256, false);
0028   set.Add(ExampleData("test"));
0029 
0030   // Prints true
0031   cout << "test exists: " << (set.Exists(ExampleData("test"))
0032       ? "true" : "false") << endl;
0033   // Prints false
0034   cout << "test2 exists: " << (set.Exists(ExampleData("test2"))
0035       ? "true" : "false") << endl;
0036 
0037   uint32_t len;
0038   char * buffer = set.Serialize(&len);
0039   HashSet<ExampleData> set2(0, false);
0040   set2.Deserialize(buffer, len);
0041   // Prints true
0042   cout << "test exists: " << (set2.Exists(ExampleData("test"))
0043       ? "true" : "false") << endl;
0044   // Prints false
0045   cout << "test2 exists: " << (set2.Exists(ExampleData("test2"))
0046       ? "true" : "false") << endl;
0047 
0048   delete[] buffer;
0049   return 0;
0050 }
0051 ```
0052 
0053 ## Build everything in release
0054 
0055 ```
0056 make
0057 ```
0058 
0059 ## Running sample
0060 
0061 ```
0062 make sample
0063 ```
0064 
0065 ## Running tests
0066 
0067 ```
0068 make test
0069 ```
0070 
0071 ## Clearing build files
0072 ```
0073 make clean
0074 ```
0075 
0076 ## Linting
0077 ```
0078 npm run lint
0079 ```