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What is a “callback” in C and how are they implemented?
...dlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include "../../common_typedef.h"
typedef void (*call_back) (S32, S32);
void test_call_back(S32 a, S32 b)
{
printf("In call back function, a:%d \t b:%d \n", a, b);
}
void call_callback_func(call_back back)...
Is an empty href valid?
... of the existing answers references the relevant specifications.
An empty string can’t be a URI. However, the href attribute doesn’t only take URIs as value, but also URI references. An empty string may be a URI reference.
HTML 4.01
HTML 4.01 uses RFC 2396, where it says in section 4.2. Same-...
How to control the line spacing in UILabel
...Style = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = 40
let attrString = NSMutableAttributedString(string: "Swift Answer")
attrString.addAttribute(.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attrString.length))
var tableViewCell = NSTableCellView()
tableViewCell.textField...
Add custom messages in assert?
...==b is false, the and-expression should also be false, and, therefore, the string should not be evaluated.
– ragnarius
Nov 7 '14 at 17:31
1
...
Creating an API for mobile applications - Authentication and Authorization
...he initial/primary purpose will be for consumption by mobile apps (iPhone, Android, Symbian, etc). I've been looking into different mechanisms for authentication and authorization for web-based APIs (by studying other implementations). I've got my head wrapped around most of the fundamental concep...
WCF ServiceHost access rights
...URL is being blocked from being created by Windows.
Steps to fix:
Run command prompt as an administrator.
Add the URL to the ACL
netsh http add urlacl url=http://+:8000/ServiceModelSamples/Service user=mylocaluser
share
...
Using XPATH to search text containing
... <td>&nbsp;</td>
</tr>
To locate the node with the string &nbsp; you can use either of the following xpath based solutions:
Using text():
"//td[text()='\u00A0']"
Using contains():
"//td[contains(., '\u00A0')]"
However, ideally you may like to avoid the NO-BRE...
Append a dictionary to a dictionary [duplicate]
...
You can do
orig.update(extra)
or, if you don't want orig to be modified, make a copy first:
dest = dict(orig) # or orig.copy()
dest.update(extra)
Note that if extra and orig have overlapping keys, the final value will be taken from extra. For...
Uses for Optional
...de to work, but it's rather clumsy. Suppose you have a method that takes a string followed by an optional second string. Accepting an Optional as the second arg would result in code like this:
foo("bar", Optional.of("baz"));
foo("bar", Optional.empty());
Even accepting null is nicer:
foo("bar", ...
(413) Request Entity Too Large | uploadReadAheadSize
...rge messages. Also if you don't use MTOM it sends byte[] to base64 encoded string (33% increase in size) => 48KB * 1,33 = 64KB
To solve this issue you must reconfigure your service to accept larger messages. This issue previously fired 400 Bad Request error but in newer version WCF started to us...