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Write a function that returns the longest palindrome in a given string

... When someone goes on Stack Overflow, the question "answer" should actually contain an answer. Not just a bunch of directions towards the answer.. – Erik Philips Oct 22 '18 at 17:16 ...
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Are there disadvantages to using a generic varchar(255) for all text-based fields?

...stcode , first name , last name , town , country , phone number etc, all of which are defined as VARCHAR(255) even though none of these fields will ever come close to having 255 characters. (If you're wondering, it's this way because Ruby on Rails migrations map String fields to VARCHAR(25...
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Why does 1==1==1 return true, “1”==“1”==“1” return true, and “a...

... @KonradGadzina: Strict equals will make all three functions return false. – Jon May 9 '14 at 10:18 1 ...
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Are NSLayoutConstraints animatable? [duplicate]

...g now (I was using this pattern before but still with no success)...I was calling setNeedsLayout instead of layoutIfNeeded Surely a DOH moment! Actually just changing a constraint automatically calls setNeedsLayout so I guess layoutIfNeeded overrides it somehow. – borrrden ...
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What is the fastest way to compare two sets in Java?

... firstSet.equals(secondSet) It really depends on what you want to do in the comparison logic... ie what happens if you find an element in one set not in the other? Your method has a void return type so I assume you'll do the necessary work in this method. M...
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Why is there huge performance hit in 2048x2048 versus 2047x2047 array multiplication?

...he misses on matice1 are not the problem because they are accessed sequentially. However for matice2 if a full column fits in L2 (i.e when you access matice2[0, 0], matice2[1, 0], matice2[2, 0] ... etc, nothing gets evicted) than there is no problem with cache misses with matice2 either. Now to go ...
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Prevent Caching in ASP.NET MVC for specific actions using an attribute

...C 3 application. This application requests records through jQuery. jQuery calls back to a controller action that returns results in JSON format. I have not been able to prove this, but I'm concerned that my data may be getting cached. ...
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How do I install an old version of Django on virtualenv?

...d question, since the very purpose of virtualenv is to this exactly: Installing some specific version of a package (in this case Django) inside the virtual environment. But it's exactly what I want to do, and I can't figure it out. ...
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How to exit if a command failed?

...on-zero). Using ( ) makes the command inside them run in a sub-shell and calling a exit from there causes you to exit the sub-shell and not your original shell, hence execution continues in your original shell. To overcome this use { } The last two changes are required by bash. ...
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XPath to find elements that does not have an id or class

How can I get all tr elements without id attribute? 4 Answers 4 ...