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Chris Ward 2019-01-16 14:50:50 +02:00
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docs/frequently-asked-questions.rst
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@ -108,36 +108,6 @@ In this example::
}
}
Can a contract pass an array (static size) or string or ``bytes`` (dynamic size) to another contract?
=====================================================================================================
Sure. Take care that if you cross the memory / storage boundary,
independent copies will be created::
pragma solidity >=0.4.16 <0.6.0;
contract C {
uint[20] x;
function f() public {
g(x);
h(x);
}
function g(uint[20] memory y) internal pure {
y[2] = 3;
}
function h(uint[20] storage y) internal {
y[3] = 4;
}
}
The call to ``g(x)`` will not have an effect on ``x`` because it needs
to create an independent copy of the storage value in memory.
On the other hand, ``h(x)`` successfully modifies ``x`` because only
a reference and not a copy is passed.
What does the following strange check do in the Custom Token contract?
======================================================================