Hi,
Is it better to have a field status enum('active', 'hidden', 'deleted') OR status tinyint(3) with a lookup table. Assume that status can take only one value at a time.
In particular, I am interested in knowing, are operations on enum significantly slower than or as fast as operations on int ?
There is a related question on SO Mysql: enum confusion but
i) It does not discuss performance at all
ii) There is very little explanation on WHY one approach is better than the other.
regards,
JP
This is a very very basic question and I know one way is to do the following:
char buffer[33];
itoa(aq_width, buffer,10);
where aq_width is the int, but then I can't guarantee what size of buffer I would need in order to do this... I can always allocate a very large buffer size, but that wouldn't be very nice... any other pretty and simple way to do this?
I have a long int variable that I need to convert to a signed 32bit hexadecimal string (8 characters) (char array) without the "0x" at the start?
How would I go about doing this?
Thanks.
I'm getting some errors with the following methods:
1) How do I return screenHeight / cellCount as a CGFLoat for the first method?
2) How do I use the equivalent of ObjC's MIN() and MAX() in the second method?
func tableView(tableView: UITableView!, heightForRowAtIndexPath indexPath: NSIndexPath!) -> CGFloat {
var cellCount = Int(self.tableView.numberOfRowsInSection(indexPath.section))
return screenHeight / cellCount as CGFloat
}
// #pragma mark - UIScrollViewDelegate
func scrollViewDidScroll(scrollView: UIScrollView) {
let height = CGFloat(scrollView.bounds.size.height)
let position = CGFloat(MAX(scrollView.contentOffset.y, 0.0))
let percent = CGFloat(MIN(position / height, 1.0))
blurredImageView.alpha = percent
}
I'm getting strange error "'int' object has no attribute 'startswith'"
I haven't used the word "startswith" in my python program. ?
Does any one how to fix this -- or what it refers to ?
I use sql server 2005 and asp.net C#.
Is there any two-way encryption method for int column of a table?
It can be user-defined-function in sql server 2005 or C# method.
At first I want to apologize for my poor english.I want to know how to announce int to make sure it's 4 bytes or short in 2 bytes no matter on what platform. Does C99 have rules about this?Thanks:)
I have a MySQL database on my server and I"m pretty sure it's an int over flow on one table with an auto_increment field that's crashing it.
I can delete the table, it's not very important, but I can't get into the server.
Is there anyway to delete that database from the file system or without logging into MySQL?
HELP! THE WORLD IS ENDING!
How does one convert an empty string to an int using Struts2. When the application encounters this parameter with no value, like from an empty text field, it throws the following exception.
java.lang.NoSuchMethodException:
com.XXXXXXXXXXXX.setID([Ljava.lang.String;)
Where ID is an integer, and the URL is:
Something.action?ID=&other=rawr
Is there a way to do this without using an Integer (class)? Do I have to write a type converter?
I am calculating the int equivalent of a given set of bits and storing that in memory. From there, I would like to determine all 1 value bits from the original bitmask. Example:
33 -- [1,6]
97 -- [1,6,7]
Ideas for an implementation in Java?
Does setWidth(int pixels) use device independent pixel or physical pixel as unit?
For example, does setWidth(100) set the a view's width to 100 dips or 100 pxs?
Thanks.
What is the best way to get individual digits from an int with n number of digits for use in a radix sort algorithm? I'm wondering if there is a particularly good way to do it in C/C++, if not what is the general best solution?
I have an int* of rgb data,width, height, and scanlinestride where i would like to create an NSImage.
i have looked around and found that i need to use NSData?
what is the ideal way of doing this?
for(int i = 1;i<100;i++)
string strI = i.tostirng();
in here, if i is 1 then strI is '1'
But I want to get '01'
or '001'
it looks quite easy. but there's only article about datetime.tostring("yyyy-MM-dd") :(
we have a large table (5608782 rows and growing) that has 3 columns Zip1,Zip2, distance
all columns are currently int, we would like to convert this table to use varchars for international usage but need to do a mass import into the new table convert zip < 5 digits to 0 padded varchars 123 becomes 00123 etc. is there a way to do this short of looping over each row and doing the translation programmaticly?
I want to convert an int to a string but if it is a single digit I want to add a leading 0
Is that one of the built in format options? or do I have to do it manually?
Hi Experts,
I have a list of int values some thing like below (upper bound and lower bounds are dynamic)
1, 2, 3
4, 6, 0
5, 7, 1
I want to calculate the column values in vertical wise like
1 + 4 + 5 = 10
2 + 6 + 7 = 15
3 + 0 + 1 = 4
Expected Result = 10,15,4
Any help would be appreciated
Thanks
Deepu
g++ compiler complains about conversions between related types (from int to enum, from void* to class*, from const char* to unsigned char*, etc.). Compiler handles such convertions as errors and won't compile furthermore. It occurs only when I compile using Dev-C++ IDE, but when I compile the same code (using the compiler which Dev-C++ uses) such errors (even warnings) do not appears.
How to mute errors of such types?
Would (1) int a; new Object[] {a} be the same as (2) new Object[] {new Integer(a)} ?
If I do the 1st one, will (new Object[]{a})[0] give me an Integer?
thank you