/
MemoryArrayBuildingGasExample.sol
141 lines (109 loc) · 5.29 KB
/
MemoryArrayBuildingGasExample.sol
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pragma solidity ^0.4.20;
contract MemoryArrayBuildingCheap {
struct Item {
string name;
string category;
address owner;
uint32 zipcode;
uint32 price;
}
Item[] public items;
mapping(address => uint) public ownerItemCount;
function getItemsbyOwner(address _owner) public view returns (uint[]) {
uint[] memory result = new uint[](ownerItemCount[_owner]);
uint counter = 0;
for (uint i = 0; i < items.length; i++) {
if (items[i].owner == _owner) {
result[counter] = i;
counter++;
}
}
return result;
}
function initialize() public {
Item memory tempItem = Item("test1", "house", 0xca35b7d915458ef540ade6068dfe2f44e8fa733c, 80331, 212);
items.push(tempItem);
ownerItemCount[0xca35b7d915458ef540ade6068dfe2f44e8fa733c]++;
tempItem = Item("test2", "house", 0x0ad04da547702b9ca134f929e3c3009424b7da70, 80331, 212);
items.push(tempItem);
ownerItemCount[0x0ad04da547702b9ca134f929e3c3009424b7da70]++;
tempItem = Item("test3", "house", 0xca35b7d915458ef540ade6068dfe2f44e8fa733c, 80331, 212);
items.push(tempItem);
ownerItemCount[0xca35b7d915458ef540ade6068dfe2f44e8fa733c]++;
tempItem = Item("test4", "house", 0x0ad04da547702b9ca134f929e3c3009424b7da70, 80331, 212);
items.push(tempItem);
ownerItemCount[0x0ad04da547702b9ca134f929e3c3009424b7da70]++;
tempItem = Item("test5", "house", 0x0ad04da547702b9ca134f929e3c3009424b7da70, 80331, 212);
items.push(tempItem);
ownerItemCount[0x0ad04da547702b9ca134f929e3c3009424b7da70]++;
tempItem = Item("test6", "house", 0x0ad04da547702b9ca134f929e3c3009424b7da70, 80331, 212);
items.push(tempItem);
ownerItemCount[0x0ad04da547702b9ca134f929e3c3009424b7da70]++;
tempItem = Item("test7", "house", 0x0ad04da547702b9ca134f929e3c3009424b7da70, 80331, 212);
items.push(tempItem);
ownerItemCount[0x0ad04da547702b9ca134f929e3c3009424b7da70]++;
tempItem = Item("test8", "house", 0x0ad04da547702b9ca134f929e3c3009424b7da70, 80331, 212);
items.push(tempItem);
ownerItemCount[0x0ad04da547702b9ca134f929e3c3009424b7da70]++;
tempItem = Item("test9", "house", 0x0ad04da547702b9ca134f929e3c3009424b7da70, 80331, 212);
items.push(tempItem);
ownerItemCount[0x0ad04da547702b9ca134f929e3c3009424b7da70]++;
tempItem = Item("test10", "house", 0x0ad04da547702b9ca134f929e3c3009424b7da70, 80331, 212);
items.push(tempItem);
ownerItemCount[0x0ad04da547702b9ca134f929e3c3009424b7da70]++;
}
}
contract MemoryArrayBuildingExpensive {
struct Item {
string name;
string category;
address owner;
uint32 zipcode;
uint32 price;
}
Item[] public items;
mapping(address => uint) public ownerItemCount;
function getItemsbyOwner(address _owner) public returns (uint[]) {
uint[] memory result = new uint[](ownerItemCount[_owner]);
uint counter = 0;
for (uint i = 0; i < items.length; i++) {
if (items[i].owner == _owner) {
result[counter] = i;
counter++;
}
}
return result;
}
function initialize() public {
Item memory tempItem = Item("test1", "house", 0xca35b7d915458ef540ade6068dfe2f44e8fa733c, 80331, 212);
items.push(tempItem);
ownerItemCount[0xca35b7d915458ef540ade6068dfe2f44e8fa733c]++;
tempItem = Item("test2", "house", 0x0ad04da547702b9ca134f929e3c3009424b7da70, 80331, 212);
items.push(tempItem);
ownerItemCount[0x0ad04da547702b9ca134f929e3c3009424b7da70]++;
tempItem = Item("test3", "house", 0xca35b7d915458ef540ade6068dfe2f44e8fa733c, 80331, 212);
items.push(tempItem);
ownerItemCount[0xca35b7d915458ef540ade6068dfe2f44e8fa733c]++;
tempItem = Item("test4", "house", 0x0ad04da547702b9ca134f929e3c3009424b7da70, 80331, 212);
items.push(tempItem);
ownerItemCount[0x0ad04da547702b9ca134f929e3c3009424b7da70]++;
tempItem = Item("test5", "house", 0x0ad04da547702b9ca134f929e3c3009424b7da70, 80331, 212);
items.push(tempItem);
ownerItemCount[0x0ad04da547702b9ca134f929e3c3009424b7da70]++;
tempItem = Item("test6", "house", 0x0ad04da547702b9ca134f929e3c3009424b7da70, 80331, 212);
items.push(tempItem);
ownerItemCount[0x0ad04da547702b9ca134f929e3c3009424b7da70]++;
tempItem = Item("test7", "house", 0x0ad04da547702b9ca134f929e3c3009424b7da70, 80331, 212);
items.push(tempItem);
ownerItemCount[0x0ad04da547702b9ca134f929e3c3009424b7da70]++;
tempItem = Item("test8", "house", 0x0ad04da547702b9ca134f929e3c3009424b7da70, 80331, 212);
items.push(tempItem);
ownerItemCount[0x0ad04da547702b9ca134f929e3c3009424b7da70]++;
tempItem = Item("test9", "house", 0x0ad04da547702b9ca134f929e3c3009424b7da70, 80331, 212);
items.push(tempItem);
ownerItemCount[0x0ad04da547702b9ca134f929e3c3009424b7da70]++;
tempItem = Item("test10", "house", 0x0ad04da547702b9ca134f929e3c3009424b7da70, 80331, 212);
items.push(tempItem);
ownerItemCount[0x0ad04da547702b9ca134f929e3c3009424b7da70]++;
}
}