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| author | Alex Beregszaszi <alex@rtfs.hu> | 2016-10-16 05:34:35 +0800 |
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| committer | Alex Beregszaszi <alex@rtfs.hu> | 2016-10-19 21:02:50 +0800 |
| commit | 1b3713742f10a4749e6f15b9344d8ffaef19790e (patch) | |
| tree | 97e978d750a2305d2cb8d4086c78c434a2af29fa /docs/frequently-asked-questions.rst | |
| parent | f0f2d5a612e0f646c7d6cec0092d2713ba9d686b (diff) | |
| download | dexon-solidity-1b3713742f10a4749e6f15b9344d8ffaef19790e.tar.gz dexon-solidity-1b3713742f10a4749e6f15b9344d8ffaef19790e.tar.zst dexon-solidity-1b3713742f10a4749e6f15b9344d8ffaef19790e.zip | |
Document constant functions
Diffstat (limited to 'docs/frequently-asked-questions.rst')
| -rw-r--r-- | docs/frequently-asked-questions.rst | 14 |
1 files changed, 0 insertions, 14 deletions
diff --git a/docs/frequently-asked-questions.rst b/docs/frequently-asked-questions.rst index e0bdcfb4..6d47e4a7 100644 --- a/docs/frequently-asked-questions.rst +++ b/docs/frequently-asked-questions.rst @@ -97,20 +97,6 @@ Its type is the type of the contract. Since any contract type basically inherits ``address`` type, ``this`` is always convertible to ``address`` and in this case contains its own address. -What is the difference between a function marked ``constant`` and one that is not? -================================================================================== - -``constant`` functions can perform some action and return a value, but cannot -change state (this is not yet enforced by the compiler). In other words, a -constant function cannot save or update any variables within the contract or wider -blockchain. These functions are called using ``c.someFunction(...)`` from -geth or any other web3.js environment. - -"non-constant" functions (those lacking the ``constant`` specifier) must be called -with ``c.someMethod.sendTransaction({from:eth.accounts[x], gas: 1000000});`` -That is, because they can change state, they have to have a gas -payment sent along to get the work done. - Get a contract to return its funds to you (not using ``selfdestruct(...)``). ============================================================================ |