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To simplify each example, while sill allowing to copy paste we can abstract the kill() function into a Mortal contract.

Some .sol files have no compiler version specified

hello guys, if I stored some data in struct array, how can I read and return this struct array data. hope your answer.

https://github.com/fivedogit/solidity-baby-steps/blob/master/contracts/30_endowment_retriever.sol#L6

since the contractor is using msg.value it has to be payable.

To simplify each example, while sill allowing to copy paste we can abstract the kill() function into a Mortal contract.

Currently contracts are either missing a compiler version or are referencing different ones.
We can harmonise all the contracts to reference the same version (^4.25.0 ?).
For educational purposes it may be useful to keep examples of previous implementations. In order to facilitate maintenance we can even create a corresponding tag or branch each time we update the version.

File: MsgValueToBytes.sol
statement: import "mortal"

but i can't find location of "mortal".
please help me, thanks.

change

The constant function modifier, as used in e.g. contracts/05_greeter.sol, is deprecated and should be replaced with view

Like MIT/BSD