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How do I set a conditional breakpoint in gdb, when char* x points to a string whose value equals “he
Can I specify that I want gdb to break at line x when char* x points to a string whose value equals "hello" ? If yes, how?
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Math - mapping numbers
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If your number X falls between A and B, and you would like Y to fall between C and D, you can apply the following linear transform:
Y = (X-A)/(B-A) * (D-C) + C
That should give you what you want, although your question is a little ambigu...
How can I convert my device token (NSData) into an NSString?
...iceToken: Data) {
let token = deviceToken.map { String(format: "%02.2hhx", $0) }.joined()
print(token)
}
Old answer using NSData:
func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) {
let tokenChars = UnsafePointer<CChar&...
JavaScript property access: dot notation vs. brackets?
...n't be used with dot notation:
var foo = myForm.foo[]; // incorrect syntax
var foo = myForm["foo[]"]; // correct syntax
including non-ASCII (UTF-8) characters, as in myForm["ダ"] (more examples).
Secondly, square bracket notation is useful when dealing with
property names which vary in a pre...
Find mouse position relative to element
...ition, and then subtract it from the parent element's offset position.
var x = evt.pageX - $('#element').offset().left;
var y = evt.pageY - $('#element').offset().top;
If you're trying to get the mouse position on a page inside a scrolling pane:
var x = (evt.pageX - $('#element').offset().left) + s...
Hidden features of WPF and XAML?
...d for variety of languages. Now I am curious about some hidden features of XAML and WPF?
25 Answers
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How to check if type of a variable is string?
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In Python 2.x, you would do
isinstance(s, basestring)
basestring is the abstract superclass of str and unicode. It can be used to test whether an object is an instance of str or unicode.
In Python 3.x, the correct test is
isinstan...
Unpacking, extended unpacking and nested extended unpacking
Consider the following expressions. Note that some expressions are repeated to present the "context".
3 Answers
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Matplotlib scatter plot with different text at each data point
...plot and annotate data points with different numbers from a list.
So, for example, I want to plot y vs x and annotate with corresponding numbers from n .
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What is C# analog of C++ std::pair?
...s belonging to the generic class cannot be inferred in an object creation expression (constructor call), the authors of BCL made a non-generic helper class called Tuple. Therefore you can say Tuple.Create("Hello", 4) which is a bit easier than new Tuple<string, int>("Hello", 4). (By the way, ....