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The place to discuss design and usage of and changes to the Solidity programming language.
For multiple inheritance, the most derived base contracts that define the same function must be specified explicitly after the override keyword. Functions with the private visibility cannot be virtual. Functions without implementation have to be marked virtual outside of interfaces. In interfaces, all functions are automatically considered virtual. pragma solidity >=0.5.0 <0.7.0; contract Base ...
I'm trying to concatenate two strings in solidity. I tried with + or . but neither option works. There is not much documentation on string concatenation yet. Is it even possible? If not, can I in...
Apart from the public modifier Ethereum introduces the external one. Both may be called outside of the contract and inside (the later one by this.f() pattern). Moreover, according to the docs:
I have seen people use both memory and calldata keywords when writing Solidity. Specifically, they are used when declaring function parameters that take dynamic types like 'structs' or 'arrays'.
What's the best way to calculate with dates in solidity, in particular, getting the total number of days between the start date and end date? Also What's the best way to get the current date/time...
You need to use an array in storage because . Otherwise you need to define the size of the array during initialization:
I've been looking through the code of Etherdice and noticed that some variables are declared like ParserResult memory result; and I haven't found the keyword "memory" in any documentation.
I am trying to pass a struct as an argument while calling the function of another contract: pragma solidity ^0.4.24; pragma experimental ABIEncoderV2; library Test { struct TStruct { int x...
Solidity 0.6.0 and Greater (Updated 2020) As of Solidity 0.6.0, there is array slice functionality built into Solidity. The syntax is similar to existing languages in that the array takes the following parameters x[start:end]. Here, start and end are int s that represent the starting and ending index to be sliced.
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