ArrayPops.sol

// fun with arrays
pragma solidity ^0.4.10;

contract ArrayPops {
    // create some arrays to check out
    uint[] public uint_arr;
    string[] public string_arr;
    bytes32[] public bytes32_arr;
    
    function ArrayPops() {
        // fill our arrays with arbitrary data
        uint_arr = [1,2,3,4,5];
        string_arr = ['one', 'two', 'three', 'four', 'five'];
        bytes32_arr = [bytes32(0), bytes32(1), bytes32(2), bytes32(3), bytes32(4)];
    }
    
    
    // returns an empty value
    function broken_pop_string () returns (string) {
        string member = string_arr[string_arr.length-1];
        string_arr.length--;
        return member;
    }
    
    function pop_string () returns (string member) {
        member = string_arr[string_arr.length-1];
        string_arr.length--;
        return member;
    }
    
    function pop_uint () returns (uint member) {
        member = uint_arr[uint_arr.length-1];
        uint_arr.length = uint_arr.length-1;
        return member;
    }
    
    // not actually broken
    function broken_pop_uint () returns (uint) {
        uint member = uint_arr[uint_arr.length-1];
        uint_arr.length = uint_arr.length-1;
        return member;
    }

    function pop_bytes32 () returns (bytes32 member) {
        member = bytes32_arr[bytes32_arr.length-1];
        bytes32_arr.length = bytes32_arr.length-1;
        return member;
    }

    // not actually broken    
    function broken_pop_bytes32 () returns (bytes32) {
        bytes32 member = bytes32_arr[bytes32_arr.length-1];
        bytes32_arr.length = bytes32_arr.length-1;
        return member;
    }
    
}