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Maximum single-sell profit

Suppose we are given an array of n integers representing stock prices on a single day. We want to find a pair (buyDay, sellDay) , with buyDay ≤ sellDay , such that if we bought the stock on buyDay and sold it on sellDay , we would maximize our profit. ...
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Check if an element's content is overflowing?

What's the easiest way to detect if an element has been overflowed? 14 Answers 14 ...
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How do I get my Python program to sleep for 50 milliseconds?

How do I get my Python program to sleep for 50 milliseconds? 6 Answers 6 ...
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Full Page

I have the example code below. This works fine with all browsers except for browsers on mobile devices. 5 Answers ...
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What is the difference between & and && in Java?

I always thought that && operator in Java is used for verifying whether both its boolean operands are true , and the & operator is used to do Bit-wise operations on two integer types. ...
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How to Rotate a UIImage 90 degrees?

I have a UIImage that is UIImageOrientationUp (portrait) that I would like to rotate counter-clockwise by 90 degrees (to landscape). I don't want to use a CGAffineTransform . I want the pixels of the UIImage to actually shift position. I am using a block of code (shown below) originally inten...
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Clearing a string buffer/builder after loop

How do you clear the string buffer in Java after a loop so the next iteration uses a clear string buffer? 8 Answers ...
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Fade Effect on Link Hover?

on many sites, such as http://www.clearleft.com , you'll notice that when the links are hovered over, they will fade into a different color as opposed to immediately switching, the default action. ...
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Looping through array and removing items, without breaking for loop

I have the following for loop, and when I use splice() to remove an item, I then get that 'seconds' is undefined. I could check if it's undefined, but I feel there's probably a more elegant way to do this. The desire is to simply delete an item and keep on going. ...
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Why is null an object and what's the difference between null and undefined?

Why is null considered an object in JavaScript? 21 Answers 21 ...