add Solidity/nonkung51.sol

narze · Oct 3, 2021 · e59708b · e59708b
1 parent 514c3b1
commit e59708b
Showing 1 changed file with 30 additions and 0 deletions.
diff --git a/Solidity/nonkung51.sol b/Solidity/nonkung51.sol
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+pragma solidity >=0.7.0 <0.9.0;
+
+contract Coffee2Code {
+
+    string coffee = "coffee";
+
+    function code() public view returns (string memory) {
+        bytes memory _str = bytes(coffee);
+
+        // coffee -> code : 6 -> 4
+        string memory tmp = new string(_str.length - 2);
+        bytes memory _code = bytes(tmp);
+
+        uint filled = 0;
+        for(uint i = 0; filled < _str.length - 2; i++) {
+            if (keccak256(abi.encodePacked(_str[i])) == keccak256(abi.encodePacked("f"))) {
+                _code[filled] = "d";
+                i+=1;
+            } else if (keccak256(abi.encodePacked(_str[i])) == keccak256(abi.encodePacked("e"))) {
+                _code[filled] = "e";
+                i+=1;
+            } else {
+                _code[filled] = _str[i];
+            }
+            filled += 1;
+        }
+
+        return string(_code);
+    }
+}