大约有 43,000 项符合查询结果（耗时：0.0382秒） [XML]
Avoid trailing zeroes in printf()
...ll remove all but the first N decimals, then strip off the trailing zeros (and decimal point if they were all zeros).
char str[50];
sprintf (str,"%.20g",num); // Make the number.
morphNumericString (str, 3);
: :
void morphNumericString (char *s, int n) {
char *p;
int count;
p = str...
Why is “int i = 2147483647 + 1;” OK, but “byte b = 127 + 1;” is not compilable?
...
Constants are evaluated as ints, so 2147483647 + 1 overflows and gives you a new int, which is assignable to int, while 127 + 1 also evaluated as int equals to 128, and it is not assignable to byte.
share
...
In Ruby on Rails, what's the difference between DateTime, Timestamp, Time and Date?
... @n13 Good point, but not really an issue in Rails, since it converts to UTC before inserting datetimes into the database.
– vonconrad
Apr 12 '12 at 3:18
13
...
Android: Generate random color on click?
I have an ImageView , in which I am programmaticly creating drawables and presenting them to the user. My goal is to click on said ImageView and change the drawable's color.
...
The most efficient way to implement an integer based power function pow(int, int)
... break;
base *= base;
}
return result;
}
This is the standard method for doing modular exponentiation for huge numbers in asymmetric cryptography.
share
|
improve this answer
...
C++: Rounding up to the nearest multiple of a number
OK - I'm almost embarrassed posting this here (and I will delete if anyone votes to close) as it seems like a basic question.
...
Getting only Month and Year from SQL DATE
...e, so using the first moment of each month is the standard practice. When converting this DATETIME value to a string (Aaplication Layer, Presentation Layer, Reporting Layer, etc), you can always choose to format it with just the year and month parts. But in terms of "in database" data manipulation...
How to download an entire directory and subdirectories using wget?
...
you can also use this command :
wget --mirror -pc --convert-links -P ./your-local-dir/ http://www.your-website.com
so that you get the exact mirror of the website you want to download
share
...
What is the strict aliasing rule?
... ability to give aliasing warnings, sometimes giving us a friendly warning and sometimes not.)
To see why this behavior is undefined, we have to think about what the strict aliasing rule buys the compiler. Basically, with this rule, it doesn't have to think about inserting instructions to refresh th...
Modulo operation with negative numbers
...
Should the compiler be smart enough and detect that an unsigned modulo another unsigned is always positive? Currently (well, GCC 5.2) the compiler seems to think that "%" returns an "int" in this case, rather than "unsigned" even when both operands are uint32_...