dapp.md

To use the specific version of solidity compiler, add this in the truffle-config.js inside module.exports

compilers: {
  solc: {
    version: "0.4.2"
  }
},

• In solidity, there is no way to determine the size of the mapping, and no way to iterate over it either.
• You can access any default key in the mapping and it won't throw and error. It will return the default value.

Ref commands:

> truffle console
con> Election.deployed().then(function(instance){app=instance}) # this will get you the instance of the smart contract. from here you can also call the functions of the smart contract manually

> truffle migrate # will put the compiled code on the local blockchain (this will depend on the local env specified)

• how to install geth on Mac:

brew update
brew tap ethererum/ethererum
brew install ethereum
brew updgrade ethererum

To have ganache attach to development network

geth attach http://0.0.0.0:7545

• geth and mine ether too

• mist is the browser for decentralized apps.

• to start mist on macos

/Applications/Mist.app/Contents/MacOS/Mist --rpc 0.0.0.0:7545