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Capture HTML Canvas as gif/jpg/png/pdf?
...rovides Canvas.toDataURL(mimetype) which is implemented in Opera, Firefox, and Safari 4 beta. There are a number of security restrictions, however (mostly to do with drawing content from another origin onto the canvas).
So you don't need an additional library.
e.g.
<canvas id=canvas width=200...
What is the Swift equivalent of respondsToSelector?
...ional unwrapper operator. This allows you to call a method on an object if and only if the object exists (not nil) and the method is implemented.
In the case where you still need respondsToSelector:, it is still there as part of the NSObject protocol.
If you are calling respondsToSelector: on an O...
What is the difference between tree depth and height?
...
The difference between them is that in one case you count number of nodes and in other number of edges on the shortest path between root and concrete node.
Which is which?
...
String literals: Where do they go?
...e string literals changeable (it will be highly dependent on your platform and could change over time), just use arrays:
char foo[] = "...";
The compiler will arrange for the array to get initialized from the literal and you can modify the array.
...
Modify tick label text
...()
# We need to draw the canvas, otherwise the labels won't be positioned and
# won't have values yet.
fig.canvas.draw()
labels = [item.get_text() for item in ax.get_xticklabels()]
labels[1] = 'Testing'
ax.set_xticklabels(labels)
plt.show()
To understand the reason why you need to jump thro...
Xcode stuck at “Your application is being uploaded”
... from Xcode to the App Store. I have done everything regarding my project, and its running fine on my iPhone and iPad. But when I submit my project I am facing a huge problem.
...
How do you create a Swift Date object?
...
Swift has its own Date type. No need to use NSDate.
Creating a Date and Time in Swift
In Swift, dates and times are stored in a 64-bit floating point number measuring the number of seconds since the reference date of January 1, 2001 at 00:00:00 UTC. This is expressed in the Date structure. Th...
Replace multiple strings with multiple other strings
...in a string with multiple other words. The string is "I have a cat, a dog, and a goat."
18 Answers
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Fastest way to check if a string matches a regexp in ruby?
... avoids object allocations performed by other methods such as Regexp#match and =~:
Regexp#match?
Added Regexp#match?, which executes a regexp match without creating a back reference object and changing $~ to reduce object allocation.
...
Using jquery to get element's position relative to viewport
...
The easiest way to determine the size and position of an element is to call its
getBoundingClientRect() method. This method returns element positions in viewport coordinates. It expects no arguments and returns an object with
properties left, right, top, and bott...