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Difference between TCP and UDP?
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TCP is a connection oriented stream over an IP network. It guarantees that all sent packets will reach the destination in the correct order. This imply the use of acknowledgement packets sent back to the sender, and automatic retransmission, causing additional delays and a general...
Regular expression to allow spaces between words
...bols and only allows letters and numbers. The regex below works great, but it doesn't allow for spaces between words.
15 An...
How to remove an HTML element using Javascript?
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What's happening is that the form is getting submitted, and so the page is being refreshed (with its original content). You're handling the click event on a submit button.
If you want to remove the element and not submit the form, handle the submit event on the form instea...
In Python, how can you load YAML mappings as OrderedDicts?
...7+ OrderedDict type, instead of the vanilla dict and the list of pairs it currently uses.
8 Answers
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Better way to check if a Path is a File or a Directory?
I am processing a TreeView of directories and files. A user can select either a file or a directory and then do something with it. This requires me to have a method which performs different actions based on the user's selection.
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Get the closest number out of an array
I have a number from minus 1000 to plus 1000 and I have an array with numbers in it. Like this:
20 Answers
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targetContentOffsetForProposedContentOffset:withScrollingVelocity without subclassing UICollectionVi
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OK, answer is no, there is no way to do this without subclassing UICollectionViewFlowLayout.
However, subclassing it is incredibly easy for anyone who is reading this in the future.
First I set up the subclass call MyCollectionViewFlowLayout and then in interface build...
Implementing two interfaces in a class with same method. Which interface method is overridden?
Two interfaces with same method names and signatures. But implemented by a single class then how the compiler will identify the which method is for which interface?
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Why are my basic Heroku apps taking two seconds to load?
I created two very simple Heroku apps to test out the service, but it's often taking several seconds to load the page when I first visit them:
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JPA getSingleResult() or null
I have an insertOrUpdate method which inserts an Entity when it doesn't exist or update it if it does. To enable this, I have to findByIdAndForeignKey , if it returned null insert if not then update. The problem is how do I check if it exists? So I tried getSingleResult . But it throws an ex...