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Why do we use volatile keyword? [duplicate]
...
Consider this code,
int some_int = 100;
while(some_int == 100)
{
//your code
}
When this program gets compiled, the compiler may optimize this code, if it finds that the program never ever makes any attempt to change the value of some_int,...
Why does the C# compiler go mad on this nested LINQ query?
...void Main()
{
var x = Enumerable.Range(0, 1).Sum(a);
}
private static int a(int a)
{
return Enumerable.Range(0, 1).Sum(b);
}
private static int b(int b)
{
return Enumerable.Range(0, 1).Sum(c);
}
private static int c(int c)
{
return Enumerable.Range(0, 1).Sum(d);
}
private static int...
How do you implement a class in C? [closed]
...verloading and/or virtual methods, you probably need to include function pointers in structures:
typedef struct {
float (*computeArea)(const ShapeClass *shape);
} ShapeClass;
float shape_computeArea(const ShapeClass *shape)
{
return shape->computeArea(shape);
}
This would let you implemen...
Best way to format integer as string with leading zeros? [duplicate]
I need to add leading zeros to integer to make a string with defined quantity of digits ($cnt).
What the best way to translate this simple function from PHP to Python:
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How to grep and replace
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This touches every file so file times are modified; and converts line endings from CRLF to LF on Windows.
– jww
Oct 25 '17 at 0:21
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Set NOW() as Default Value for datetime datatype?
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it should work for updates too
Answers by Johan & Leonardo involve converting to a timestamp field. Although this is probably ok for the use case presented in the question (storing RegisterDate and LastVisitDate), it is not a universal solution. See datetime vs timestamp question.
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How to compare binary files to check if they are the same?
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I ended up using hexdump to convert the binary files to there hex representation and then opened them in meld / kompare / any other diff tool. Unlike you I was after the differences in the files.
hexdump tmp/Circle_24.png > tmp/hex1.txt
hexdump /tmp...
Android - Set max length of logcat messages
...size for both binary and non-binary logs is ~4076 bytes.
The kernel logger interface imposes this LOGGER_ENTRY_MAX_PAYLOAD limit.
The liblog sources (used by logcat) also say:
The message may have been truncated by the kernel log driver.
I would recommend you the nxlog tool which does n...
How to set timer in android?
... long millis = System.currentTimeMillis() - starttime;
int seconds = (int) (millis / 1000);
int minutes = seconds / 60;
seconds = seconds % 60;
text.setText(String.format("%d:%02d", minutes, seconds));
return false;
}
...
When to use std::forward to forward arguments?
...need forward to turn the lvalue-turned x (because it has a name now!) back into an rvalue reference if it was one initially.
You should not forward something more than once however, because that usually does not make sense: Forwarding means that you're potentially moving the argument all the way th...