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Diffstat (limited to 'docs/frequently-asked-questions.rst')
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diff --git a/docs/frequently-asked-questions.rst b/docs/frequently-asked-questions.rst index ff2f1fac..11db780c 100644 --- a/docs/frequently-asked-questions.rst +++ b/docs/frequently-asked-questions.rst @@ -96,36 +96,6 @@ 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? ====================================================================== |