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Efficient way of writing same process with different variable


Efficient way of writing same process with different variable

By : Grzegorz Burzyński
Date : November 21 2020, 07:35 AM
seems to work fine I am writing a program; is there any efficient way of writing this? I want to improve my knowledge. , You can certainly reduce duplication, e.g. for strength:
code :
strength_difference = fighter_strength - enemy_strength
strength_modifier = math.trunc(abs(strength_difference) / 12) # note abs
print "You are {0} than the enemy by {1}".format("weaker" if strength_difference < 0 else "stronger",
                                                 strength_modifier)
def RandomFighter(object):

    def __init__(self):
        self.strength = random.randint(1, 1000)
        self.skill = random.randint(1, 1000)

player = RandomFighter()
enemy = RandomFighter()

strength_difference = player.strength - enemy.strength
...


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which text writing classes are the most efficient for writing lots of small files?

which text writing classes are the most efficient for writing lots of small files?


By : Callimedia
Date : March 29 2020, 07:55 AM
I wish this help you I would recommend File.WriteAllText Method.Lesson is, let C# do it in its own way because implementers must have cared about the performance.
I tried benchmarking two functions with following code(Please feel free to suggest if you have better code):-
code :
class Program
    {       
        static void Main(string[] args)
        {
            const int _max = 1000000;
            string data = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
            string path="First\\" + "txt";
            string path2 = "Second\\" + "txt";
            var s1 = Stopwatch.StartNew();
            for (int i = 0; i < 336; i++)
            {
                File.WriteAllText(path+i, data);
            }
            s1.Stop();

            var s2 = Stopwatch.StartNew();
            for (int i = 0; i < 336; i++)
            {
                using (StreamWriter sw = new StreamWriter(path2+i))
                {                   
                        sw.WriteLine(data);                    
                }
            }
            s2.Stop();

            Console.WriteLine("Loop1 {0}\n",((double)(s1.Elapsed.TotalMilliseconds * 1000000) / _max).ToString("0.00 ns"));
            Console.WriteLine("Loop2 {0}\n", ((double)(s2.Elapsed.TotalMilliseconds * 1000000) / _max).ToString("0.00 ns"));
            Console.ReadKey();
        }
    }
Loop1 16880.90 

Loop2 17285.55 
On Windows, how to open for writing a file already opened for writing by another process?

On Windows, how to open for writing a file already opened for writing by another process?


By : roywei
Date : March 29 2020, 07:55 AM
I wish this help you
Even if the application opens the file as a shared object Python can't so they can't get along by the looks of it.
Is put-ing to a ByteBuffer then writing it to a file more efficient than writing the individual field

Is put-ing to a ByteBuffer then writing it to a file more efficient than writing the individual field


By : Bruno Strogono
Date : March 29 2020, 07:55 AM
This might help you As you are doing file I/O, you should bear in mind that the I/O operations are likely to be very much slower than any work done by the CPU in your output code. To a first approximation, the cost of I/O is an amount proportional to the amount of data you are writing, plus a fixed cost for each operating system call made to do the I/O.
So in your case you want to minimise the number of operating system calls to do the writing. This is done by buffering data in the application, so the application performs few put larger operating system calls.
code :
 OutputStream bo = new BufferedOutputStream(new FileOutputStream(checking));
I wanna read data from my binary file after the writing process complete and also read data without the writing process

I wanna read data from my binary file after the writing process complete and also read data without the writing process


By : Durga Prasad
Date : March 29 2020, 07:55 AM
To fix this issue Here is my part of the code from binary file writing. here I'm passing a 2d vector table that contains text format data or binary data. if the main table contains binary data I wanna read and load that data into one vector table. I already done that if the data is text file I can load that data from that file, but it's a binary data I don't know how can I load. I am also using index table. That means that table contains size of the each field in main table. , You made a mistake in your writing code
code :
fs.write(reinterpret_cast<char*> (&len),len);
fs.write(reinterpret_cast<char*>(&len), sizeof len);
vector<char> temp;
fs.read(reinterpret_cast<char*>(&len), sizeof len);
if (len > 0)
{
    temp.resize(len);
    fs.read(&temp[0], len);
}
mainTbl[i].at(j) = string(temp.begin(), temp.end());
Is it safe/efficient to cancel a c++ thread by writing to an outside variable?

Is it safe/efficient to cancel a c++ thread by writing to an outside variable?


By : Carlitos Way
Date : March 29 2020, 07:55 AM
like below fixes the issue No, there's no guarantee that this will do anything sensible. The code has one thread reading the value of ii and another thread writing to it, without any synchronization. The result is that the behavior of the program is undefined.
I'd just add a flag to the class:
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