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Creating an array of objects in Java
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This is correct.
A[] a = new A[4];
...creates 4 A references, similar to doing this:
A a1;
A a2;
A a3;
A a4;
Now you couldn't do a1.someMethod() without allocating a1 like this:
a1 = new A();
Similarly, with the array you need to do this:
a[0] = n...
Selectors in Objective-C?
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answered Apr 10 '09 at 19:42
Adam RosenfieldAdam Rosenfield
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How to make a flat list out of list of lists?
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42 Answers
42
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Are Swift variables atomic?
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answered Jun 11 '14 at 9:00
Sash ZatsSash Zats
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String.format() to format double in java
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answered Feb 3 '11 at 11:04
David TangDavid Tang
84.3k2828 gold badges156156 silver badges144144 bronze badges
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Why are these constructs using pre and post-increment undefined behavior?
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14 Answers
14
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Get a pixel from HTML Canvas?
...pixel and invert the color.
for (var i = 0, n = pix.length; i < n; i += 4) {
pix[i ] = 255 - pix[i ]; // red
pix[i+1] = 255 - pix[i+1]; // green
pix[i+2] = 255 - pix[i+2]; // blue
// i+3 is alpha (the fourth element)
}
// Draw the ImageData at the given (x,y) coordinates.
conte...
Avoid modal dismiss on enter keypress
...side
– Luke Morgan
May 2 '12 at 10:54
I didn't see the button on the upper right hand corner, that was the problem. No...
Maximum single-sell profit
... it's helpful to see the algorithm evolve:
5 10 4 6 7
min 5 5 4 4 4
best (5,5) (5,10) (5,10) (5,10) (5,10)
Answer: (5, 10)
5 10 4 6 12
min 5 ...
Looping through the content of a file in Bash
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rogerdpack
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answered Oct 5 '09 at 18:00
Bruno De Fr...