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Design patterns For Flow diagrams use Gliffy
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############## CMake
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unordered hashmap and ordered hashmap. list vectors queue deque stack set
Mutex Conditional variables Threads Atomic variable
Shared ptr unique ptr
String streams File streams
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Unit Test. > Basic. > Negative. Integration Test. HA Test like process restart, reload, switchover, upgrade/downgrade. Scale and performance test longeivity test Memleak test FDleak test