Each weekday leading up to devcon2, Nexus will highlight a dapp, library, or package (something with a dappfile ) as a promotion of our toolchain and as case studies for other developers. Yesterday's Post.

Today's dapp is a "mixin" contract which contains the definitions of a saner and safer alternative to .call and .send , called exec and tryExec . Don't be mislead, they don't form an analogy - read the definitions.

https://github.com/nexusdev/ds-actor

The contract and function names are largely an artifact of how these were used before isolated as its own package.