The Weird and The Wonderful

Marco Bertschi wrote:

It is Qt code, where objects can be initialized by just writing "ObjectType variablename;".

Marco Bertschi wrote:

Not initialized variables are bad!

class  MutexLocker {
    QMutex &m;
public:
    MutexLocker(QMutex &qm) : m(qm) { m.lock(); }
    ~MutexLocker() { m.unlock(); }
}; // class

int GetStatus(){
   MutexLocker tmp(statusMutex);
   return status;
   // destructor unlocks 
}

Manfred R. Bihy wrote:

The compiler should issue a warning or unreachable code. Did it?

GuyThiebaut wrote:

I should have coded:

C#

if (item.Substring(0, 3).ToLower() != "PF_".ToLower())

if (string.Compare(item, 0, "PF_", 0, 3, StringComparison.OrdinalIgnoreCase) != 0)

if(item.StartsWith("PF_", StringComparison.OrdinalIgnoreCase)) ...

if(1600548864 == (*(int*)&item.ToLower()) << 8) ...

if (((BitConverter.ToInt32(Encoding.ASCII.GetBytes(item), 0) & 6250335) ^ 6243920) == 0)

((xum 567 487) (map item (lambda x (find (xor x (and y z)) (encode pi 49)))

CDP1802 wrote:

((xum 567 487) (map item (lambda x (find (xor x (and y z)) (encode pi 49)))

The language is JavaScript. that of Mordor, which I will not utter here

if(String.Equals(string1, string2, StringComparison.OrdinalIgnoreCase))
{
    ...
}

string string1 = File.ReadAllText(@"D:\Temp\MyText.txt");
string string2 = File.ReadAllText(@"D:\Temp\MyText.txt");
int x = 0;
Stopwatch sw1 = new Stopwatch();
sw1.Start();
for (int i = 0; i < 1000; i++)
    {
    if (String.Equals(string1, string2, StringComparison.OrdinalIgnoreCase))
        {
        x++;
        }
    }
sw1.Stop();
Console.WriteLine(x);
x = 0;
Stopwatch sw2 = new Stopwatch();
sw2.Start();
for (int i = 0; i < 1000; i++)
    {
    if (String.Compare(string1, string2, true) == 0)
        {
        x++;
        }
    }
sw2.Stop();
Console.WriteLine(x);
Console.WriteLine("{0}:{1}", sw1.ElapsedMilliseconds, sw2.ElapsedMilliseconds);

1000
1000
1716:4071

1000
1000
13997:3431

string string1 = File.ReadAllText(@"D:\Temp\MyText.txt");
string string2 = File.ReadAllText(@"D:\Temp\MyText.txt");
int x = 0;
Stopwatch sw1 = new Stopwatch();
sw1.Start();
for (int i = 0; i < 1000; i++)
    {
    if (String.Equals(string1, string2, StringComparison.OrdinalIgnoreCase))
        {
        x++;
        }
    }
sw1.Stop();
Console.WriteLine(x);
x = 0;
Stopwatch sw2 = new Stopwatch();
sw2.Start();
for (int i = 0; i < 1000; i++)
    {
    if (String.Compare(string1, string2, true) == 0)
        {
        x++;
        }
    }
sw2.Stop();
Console.WriteLine(x);
x = 0;
Stopwatch sw3 = new Stopwatch();
sw3.Start();
for (int i = 0; i < 1000; i++)
    {
    if (String.Compare(string1, string2, StringComparison.OrdinalIgnoreCase) == 0)
        {
        x++;
        }
    }
sw3.Stop();
Console.WriteLine(x);
Console.WriteLine("{0}:{1}:{2}", sw1.ElapsedMilliseconds, sw2.ElapsedMilliseconds,sw3.ElapsedMilliseconds);

1000
1000
1000
1694:4087:1684

1000
1000
1000
4359:2216:4383

1000
1000
1000
5363:2199:5338

1000
1000
1000
4530:2305:4519