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Modulo operation with negative numbers
...n modulo, not %.
I was expecting a positive result every time.
To perform a Euclidean modulo that is well defined whenever a/b is defined, a,b are of any sign and the result is never negative:
int modulo_Euclidean(int a, int b) {
int m = a % b;
if (m < 0) {
// m += (b < 0) ? -b ...
Objective-C parse hex string to integer
...al when scanning hexadecimal integers. If you have a string in the format #01FFFFAB, you can still use NSScanner, but you can skip the first character.
unsigned result = 0;
NSScanner *scanner = [NSScanner scannerWithString:@"#01FFFFAB"];
[scanner setScanLocation:1]; // bypass '#' character
[scann...
Avoid trailing zeroes in printf()
...ormat specifiers. The closest you could get would be:
printf("%.6g", 359.013); // 359.013
printf("%.6g", 359.01); // 359.01
but the ".6" is the total numeric width so
printf("%.6g", 3.01357); // 3.01357
breaks it.
What you can do is to sprintf("%.20g") the number to a string buffer then man...
Why does a return in `finally` override `try`?
...in the behaviour of statements (break, continue, return and throw) that perform nonlocal transfers of control. Values of the Completion type are triples of the form (type, value, target), where type is one of normal, break, continue, return, or throw, value is any ECMAScript language value or empty,...
Get the new record primary key ID from MySQL insert query?
...se the LAST_INSERT_ID() function: http://dev.mysql.com/doc/refman/5.0/en/information-functions.html#function_last-insert-id
Eg:
INSERT INTO table_name (col1, col2,...) VALUES ('val1', 'val2'...);
SELECT LAST_INSERT_ID();
This will get you back the PRIMARY KEY value of the last row that you inser...
What is an ORM, how does it work, and how should I use one? [closed]
... an ORM for a project that I'm designing, but I'm having trouble finding information on what it is or how it works.
5 Answ...
Serializing class instance to JSON
...ters and now calling the json.dumps(t.__dict__) returns proper data in the format of: {"value2": "345", "value1": "123"} I had seen posts like this before, wasn't sure whether I needed a custom serializer for members, needing init wasn't mentioned explicitly or I missed it. Thank you.
...
How can I force users to access my page over HTTPS instead of HTTP?
...this without making the whole directory require HTTPS? Or, if you submit a form to an HTTPS page from an HTTP page, does it send it by HTTPS instead of HTTP?
...
POST JSON fails with 415 Unsupported media type, Spring 3 mvc
...});
};
The Content-Type header is used by @RequestBody to determine what format the data being sent from the client in the request is. The accept header is used by @ResponseBody to determine what format to sent the data back to the client in the response. That's why you need both headers.
...
How to become an OpenCart guru? [closed]
...duct listing page, are in catalog/product_list.tpl and the product editing form is in catalog/product_form.tpl. Again, these aren't set, but a standard for the default cart.
The template file is in fact just another php file, but with a .tpl extension and is actually run in the controller file, the...