ThuanNP

git config --global diff.tool bbdiff
git config --global difftool.bbdiff.cmd 'bbdiff --wait --resume "$LOCAL" "$REMOTE"'
git config --global difftool.prompt false

git config --global merge.tool bbdiff
git config --global mergetool.bbdiff.cmd 'bbdiff --wait --resume "$LOCAL" "$REMOTE"'

Double check ~/.gitconfig 

ThuanNP

git config --global diff.tool bbdiff
git config --global difftool.bbdiff.cmd 'bbdiff --wait --resume "$LOCAL" "$REMOTE"'
git config --global difftool.prompt false

git config --global merge.tool bbdiff
git config --global mergetool.bbdiff.cmd 'bbdiff --wait --resume "$LOCAL" "$REMOTE"'

Double check ~/.gitconfig 

ThuanNP

// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.7.0 <0.9.0;

contract TestGasUsage {
    
    function displayGasUage() public view returns(uint) {
        uint256 startGas = gasleft();
        
        //int number = 5;
        uint256 usedGas = startGas - gasleft();

ThuanNP

// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.7.0 <0.9.0;

contract SimpleBank {
    
    uint public balance;
    
    constructor() {
        balance = 20000;
    }